必赢的网址登录 > 必赢 > 友好设计的DataSource代理必赢的网址登录,因为前

原标题:友好设计的DataSource代理必赢的网址登录,因为前

浏览次数:157 时间:2019-10-02

来源于raywenderlich

下个周又要投入到合营社项目标开垦中去了,今日抽空写三个看似于桌面悬停的菜单.当移到底层的时候效果看起来有一点点像二个小乌龟哦!OO友好设计的DataSource代理必赢的网址登录,因为前日的作者开采使用swift的时日相当多了。~.仍旧"花瓣"菜单好听些.

在iOS开垦中, 上下拉加载的基础代谢动画大多数的APP都会动用基本相似的体制和动画片, 当然还是有无数理想的加载动画, 不过那个动画片在境内的应用程式中的确是比非常少看见使用(以为相比较流行的东西都相当少是同胞自身首先完成的...), 在使用oc的时候, 相信广大的开荒者都会采取MJRefresh来集成上下拉刷新, 那么些绝妙的加载框架很便利的落到实处了广阔的加载须求, 同一时间, 因为其是使用系统的UIImageView来贯彻gif图片的播音, 那么就足以很有益于的向来使用安插给的gif动画图片来促成内外拉加载动画. 因为今日的撰稿人开辟应用swift的年月非常多了, 非常多的事物照旧相比期待采纳swift达成的. 像刷新控件, 也盼望利用个swift的, 于是和睦入手也促成了叁个, 在选用上尽心是周边了MJRefresh的, 可是, 假令你去比较的话, 和MJRefresh的意义,灵活度等平时, 但是代码量差别, 小编这几个首要文件二个代码量不到400行, 固然你要以史为鉴的话, 相当方便. 然后要求申明的是, 在oc中倡导使用持续来完成无数事物, 可是swift提倡面向公约编制程序, 所以本次笔者也是用公约来贯彻的.德姆o地址(那个是在草野游历的中途坐车写的, 草原的景致近年来的确不错)

  • 前言在滑行视图上加多下拉刷新是很普遍的,未来超越1/2人都以应用MJRefresh,明日自己回顾讲下如若你要团结写个刷新控件怎么写。先看看效果:

    必赢的网址登录 1自定义刷新控件.gif

  • 第一本身创办一个承继UIView的控件在自定义贰个控件的时候大家先是思考的是她要贯彻的法子,以及品质,然后再是那么些情势的兑现。

先来看一下功力

利用效果:

必赢的网址登录 2必赢的网址登录,refreshView.gif必赢的网址登录 3refreshView1.gif必赢的网址登录 4refreshView2.gif必赢的网址登录 5refreshView3.gif必赢的网址登录 6refreshView4.gif

必赢的网址登录 7XLCircleMenu.gif

金玉锦绣原理:

其实留心揣摩, 上下拉刷新的规律依旧很简短的 ------>>> 首先把刷新控件增添到scrollView的尾部或许底部, 然后监督检查到scrollView的滚动进程(底部刷新控件还须求监察和控制scrollView的剧情的转移, 每一趟退换后再也将控件调度到scrollView的最底层), 依据不一致的速度来设置刷新控件的应和的文字和图纸动画等...

  • 属性有4个

是否以为挺有趣的呀.

贯彻进程:
  • 先是写多少个scrollView的归类, 在分拣中给scrollView增多两本性格zj_refreshHeaderzj_refreshFooter用来存取header和footer刷新控件, 这里有三种方法可以实现1, 使用运转时
private var ZJHeaderKey: UInt8 = 0private var ZJFooterKey: UInt8 = 0extension UIScrollView { private var zj_refreshHeader: RefreshView? { set { objc_setAssociatedObject(self, &ZJHeaderKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) } get { return objc_getAssociatedObject(self, &ZJHeaderKey) as? RefreshView } } private var zj_refreshFooter: RefreshView? { set { objc_setAssociatedObject(self, &ZJFooterKey, newValue, .OBJC_ASSOCIATION_RETAIN_NONATOMIC) } get { return objc_getAssociatedObject(self, &ZJFooterKey) as? RefreshView } }}

2, 使用tag来存取

private var ZJHeaderTag = 1994private var ZJFooterTag = 1995extension UIScrollView { private var zj_refreshHeader: RefreshView? { set { if let header = newValue { header.tag = ZJHeaderTag addSubview } } get { return viewWithTag(ZJHeaderTag) as? RefreshView } } private var zj_refreshFooter: RefreshView? { set { if let footer = newValue { footer.tag = ZJFooterTag addSubview } } get { return viewWithTag(ZJFooterTag) as? RefreshView } } }
  • 然后在分拣中提交使用header和footer的秘诀, 注意看, 这里作者使用了某个swift中强有力的泛型和类别约束, <Animator where Animator: UIView, Animator: RefreshViewDelegate> 那些便是约束Animator必须是UIView并且遵从RefreshViewDelegate商讨的项目
 public func zj_addRefreshHeader<Animator where Animator: UIView, Animator: RefreshViewDelegate>(headerAnimator: Animator, refreshHandler: RefreshHandler ) {} public func zj_addRefreshFooter<Animator where Animator: UIView, Animator: RefreshViewDelegate>(footerAnimator: Animator, refreshHandler: RefreshHandler ) {}
  • 紧接着提供开启和终结刷新动画的办法
 /// 开启header刷新 public func zj_startHeaderAnimation() { zj_refreshHeader?.canBegin = true } /// 结束header刷新 public func zj_stopHeaderAnimation() { zj_refreshHeader?.canBegin = false } /// 开启footer刷新 public func zj_startFooterAnimation() { zj_refreshFooter?.canBegin = true } /// 结束footer刷新 public func zj_stopFooterAnimation() { zj_refreshFooter?.canBegin = false }
  • 然后是RefreshView的完毕, 在小编的兑现中, RefreshView是丰裕到scrollView的顶端大概后面部分来作为真正的基础代谢控件的器皿
  • 刷新控件的场馆: 实际上控件有七种景况
public enum RefreshViewState { /// 正在加载状态 case loading /// 正常状态 case normal /// 下拉状态 case pullToRefresh /// 松开手即进入刷新状态 case releaseToFresh}
  • 1, 平常境况, 即未开端和早已结束的状态.
  • 2, 拖拽状态, 这一年拖拽的进程小于1, 假使继续拖拽直到拖拽进度非凡1的时候, 步向下一种状态.
  • 3, 松开即进入刷新的场所, 那年放手手才干步入下三个情景, 假诺不松开手, 向反方向拖拽, 则拖拽进度会减小, 假如进程<1, 则会进来上三个动静 ...
  • 4, 加载动画状态, 这一年步入加载状态, 知道收到 停止动画的钦赐, 才甘休刷新动画走入寻常情形等待

透过那篇小说你能够学到:

下拉刷新
  • 先是将刷新控件增添到scrollView的顶端(在scrollView的分类方法中增加)
 /// public func zj_addRefreshHeader<Animator where Animator: UIView, Animator: RefreshViewDelegate>(headerAnimator: Animator, refreshHandler: RefreshHandler ) { if let header = zj_refreshHeader { header.removeFromSuperview() } /// let frame = CGRect(x: 0.0, y: -headerAnimator.bounds.height, width: bounds.width, height: headerAnimator.bounds.height) zj_refreshHeader = RefreshView(frame: frame, refreshType: .header, refreshAnimator: headerAnimator, refreshHandler: refreshHandler) addSubview(zj_refreshHeader!) }
  • 接下来必要监控scrollView的轮转(利用Cocoa强大的kvo机制)
 private func addObserverOf(scrollView: UIScrollView?) { scrollView?.addObserver(self, forKeyPath: ConstantValue.ScrollViewContentOffsetPath, options: .Initial, context: &ConstantValue.RefreshViewContext) }

必赢的网址登录 8Snip20160728_1.png

  • 在scrollView的轮转进度中, 根据滚动的偏移量来计量出拖拽的快慢, 然后总括出相应的header的景况, 依据差别的情景来对号入座的调动不相同的UI可能动画片
 if scrollView.contentOffset.y > -scrollViewOriginalValue.contentInset.top {/**头部视图并且还没到显示的临界点*/ return } // 已经进入拖拽状态, 进行相关操作 let progress = (-scrollViewOriginalValue.contentInset.top - scrollView.contentOffset.y) / self.bounds.height if scrollView.tracking { if progress >= 1.0 { refreshViewState = .releaseToFresh } else if progress <= 0.0 { refreshViewState = .normal } else { refreshViewState = .pullToRefresh } } else if refreshViewState == .releaseToFresh {// releaseToFreah 2 refresh canBegin = true// begin refresh } else {// release if progress <= 0.0 { refreshViewState = .normal } } var actualProgress = min(1.0, progress) actualProgress = max(0.0, actualProgress) refreshAnimator.refreshDidChangeProgress(self, progress: actualProgress, refreshViewType: refreshViewType)
  • 初阶和终止动画的管理, 这年供给调治scrollView的contentInset ----> 注意这里要求领悟scrollView的三大属性 contentInset, contentOffset, contentSize

千帆竞发动画的时候, 因为刷新控件是拉长到scrollView的尾部大概底部的, 在滚动的时候因为scrollView的bounces的缘故, 放手手之后, 刷新控件是会回到原先的任务的, 那个时候, 大家希望加载动画的时候, 刷新控件停在我们的兑现之内, 所以必要调解scrollView的contentInset(会自行调解contentOffset), 例如下拉刷新须求将contentInset的top加上刷新控件的冲天, 上拉刷新的时候需求将contentInset的bottom加上刷新控件的万丈

 private func startAnimation() { guard let validScrollView = scrollView else { return } validScrollView.bounces = false /// may update UI dispatch_async(dispatch_get_main_queue(), {[weak self] in guard let validSelf = self else { return } UIView.animateWithDuration(0.25, animations: { if validSelf.refreshViewType == .header { validScrollView.contentInset.top = validSelf.scrollViewOriginalValue.contentInset.top + validSelf.bounds.height } else { let offPartHeight = validScrollView.contentSize.height - validSelf.heightOfContentOnScreenOfScrollView(validScrollView) /// contentSize改变的时候设置的self.y不同导致不同的结果 /// 所有内容高度>屏幕上显示的内容高度 let notSureBottom = validSelf.scrollViewOriginalValue.contentInset.bottom + validSelf.bounds.height validScrollView.contentInset.bottom = offPartHeight>=0 ? notSureBottom : notSureBottom - offPartHeight // 加上 } }, completion: {  in /// 这个时候才正式刷新 validScrollView.bounces = true validSelf.refreshViewState = .loading validSelf.refreshHandler }

终止动画的时候, 须求将scrollView的contentInset复原为卡通早先在此以前, 以便于不影响页面包车型客车任何布局

  • 对此上拉刷新来说, 只是要多一个监督scrollView的contentSize, 在其变动的时候重新将刷新控件调解到scrollView的contentSize的最底层

  • RefreshViewDelegate的定义

public protocol RefreshViewDelegate { /// 你应该为每一个header或者footer设置一个不同的key来保存时间, 否则将公用同一个key使用相同的时间 var lastRefreshTimeKey: String? { get } /// 是否刷新完成后自动隐藏 默认为false var isAutomaticlyHidden: Bool { get } /// 上次刷新时间, 有默认赋值和返回 var lastRefreshTime: NSDate? { get set } /// repuired 三个必须实现的代理方法 /// 开始进入刷新状态, 这个时候应该开启自定义的刷新 func refreshDidBegin(refreshView: RefreshView, refreshViewType: RefreshViewType) /// 刷新结束状态, 这个时候应该关闭自定义的刷新 func refreshDidEnd(refreshView: RefreshView, refreshViewType: RefreshViewType) /// 刷新状态变为新的状态, 这个时候可以自定义设置各个状态对应的属性 func refreshDidChangeState(refreshView: RefreshView, fromState: RefreshViewState, toState: RefreshViewState, refreshViewType: RefreshViewType) /// optional 两个可选的实现方法 /// 允许在控件添加到scrollView之前的准备 func refreshViewDidPrepare(refreshView: RefreshView, refreshType: RefreshViewType) /// 拖拽的进度, 可用于自定义实现拖拽过程中的动画 func refreshDidChangeProgress(refreshView: RefreshView, progress: CGFloat, refreshViewType: RefreshViewType) }
  • 末尾是温馨三番五次 RefreshViewDelegate完毕自定义的加载, 这里, 小编提供了二种选用实例, 这两种能够成功MJRefresh提供的行使效果, 当然, 更加灵活的自定义情势, 你能够自己随意完毕, 具体的你可以参见demo中的示例, 这里只贴一点代码出来
public class NormalAnimator: UIView { /// 设置imageView @IBOutlet private weak var imageView: UIImageView! @IBOutlet private weak var indicatorView: UIActivityIndicatorView! /// 设置state描述 @IBOutlet private weak var descriptionLabel: UILabel! /// 上次刷新时间label footer 默认为hidden, 可设置hidden=false开启 @IBOutlet private weak var lastTimelabel: UILabel! public typealias SetDescriptionClosure = (refreshState: RefreshViewState, refreshType: RefreshViewType) -> String public typealias SetLastTimeClosure = (date: NSDate) -> String /// 是否刷新完成后自动隐藏 默认为false /// 这个属性是协议定义的, 当写在class里面可以供外界修改, 如果写在extension里面只能是可读的 public var isAutomaticlyHidden: Bool = false private var setupDesctiptionClosure: SetDescriptionClosure? private var setupLastTimeClosure: SetLastTimeClosure? /// 耗时 private lazy var formatter: NSDateFormatter = { let formatter = NSDateFormatter() formatter.dateStyle = .ShortStyle return formatter }() /// 耗时 private lazy var calendar: NSCalendar = NSCalendar.currentCalendar() public class func normalAnimator() -> NormalAnimator { return NSBundle.mainBundle().loadNibNamed(String(NormalAnimator), owner: nil, options: nil).first as! NormalAnimator } public func setupDescriptionForState(closure: SetDescriptionClosure) { setupDesctiptionClosure = closure } public func setupLastFreshTime(closure: SetLastTimeClosure) { setupLastTimeClosure = closure } override public func awakeFromNib() { super.awakeFromNib() indicatorView.hidden = true indicatorView.hidesWhenStopped = true } // public override func layoutSubviews() {// super.layoutSubviews()// print("layout--------------------------------------------")// }}extension NormalAnimator: RefreshViewDelegate { public func refreshViewDidPrepare(refreshView: RefreshView, refreshType: RefreshViewType) { if refreshType == .header { } else { lastTimelabel.hidden = true rotateArrowToUpAnimated } setupLastTime() } public func refreshDidBegin(refreshView: RefreshView, refreshViewType: RefreshViewType) { indicatorView.hidden = false indicatorView.startAnimating() } public func refreshDidEnd(refreshView: RefreshView, refreshViewType: RefreshViewType) { indicatorView.stopAnimating() } public func refreshDidChangeProgress(refreshView: RefreshView, progress: CGFloat, refreshViewType: RefreshViewType) { // print } public func refreshDidChangeState(refreshView: RefreshView, fromState: RefreshViewState, toState: RefreshViewState, refreshViewType: RefreshViewType) { print setupDescriptionForState(toState, type: refreshViewType) switch toState { case .loading: imageView.hidden = true case .normal: setupLastTime() imageView.hidden = false ///恢复 if refreshViewType == .header { rotateArrowToDownAnimated } else { rotateArrowToUpAnimated } case .pullToRefresh: if refreshViewType == .header { if fromState == .releaseToFresh { rotateArrowToDownAnimated } } else { if fromState == .releaseToFresh { rotateArrowToUpAnimated } } imageView.hidden = false case .releaseToFresh: imageView.hidden = false if refreshViewType == .header { rotateArrowToUpAnimated } else { rotateArrowToDownAnimated } } } private func setupDescriptionForState(state: RefreshViewState, type: RefreshViewType) { if descriptionLabel.hidden { descriptionLabel.text = "" } else { if let closure = setupDesctiptionClosure { descriptionLabel.text = closure(refreshState: state, refreshType: type) } else { switch state { case .normal: descriptionLabel.text = "正常状态" case .loading: descriptionLabel.text = "加载数据中..." case .pullToRefresh: if type == .header { descriptionLabel.text = "继续下拉刷新" } else { descriptionLabel.text = "继续上拉刷新" } case .releaseToFresh: descriptionLabel.text = "松开手刷新" } } } } }
  • 运用方式NormalAnimator
 let normal = NormalAnimator.normalAnimator() /// 指定存储刷新时间的key, 如果不指定或设置为nil, 那么将会和其他未指定的使用相同的key(记录的时间相同, MJRefresh是所有的控件使用相同的时间的) normal.lastRefreshTimeKey = "DemoKey1" /// 隐藏时间显示// normal.lastTimelabel.hidden = true /// 自定义提示文字// normal.setupDescriptionForState { (refreshState,refreshType) -> String in// switch refreshState {// case .loading:// return "努力加载中"// case .normal:// return "休息中"// case .pullToRefresh:// if refreshType == .header {// return "继续下下下下"//// } else {// return "继续上上上上"// }// case .releaseToFresh:// return "放开我"// };// } /// 自定义时间显示// normal.setupLastFreshTime {  -> String in// return ...// } tableView.zj_addRefreshHeader(normal, refreshHandler: {[weak self] in /// 多线程中不要使用 [unowned self] /// 注意这里的gcd是为了模拟网络加载的过程, 在实际的使用中, 不需要这段gcd代码, 直接在这里进行网络请求, 在请求完毕后, 调用分类方法, 结束刷新 dispatch_async(dispatch_get_global_queue, { for i in 0...50000 { if i <= 10 { self?.data.append } /// 延时 print } dispatch_async(dispatch_get_main_queue(), { self?.tableView.reloadData() /// 刷新完毕, 停止动画 self?.tableView.zj_stopHeaderAnimation })
  • GifAnimator的使用
/// 设置高度let gifAnimatorHeader = GifAnimator.gifAnimatorWithHeight gifAnimatorHeader.lastRefreshTimeKey = "exampleHeader4" /// 为不同的state设置不同的图片 /// 闭包需要返回一个元组: 图片数组和gif动画每一帧的执行时间 /// 一般需要设置loading状态的图片, 作为加载的gif /// 和pullToRefresh状态的图片数组, 作为拖拽时的加载动画 gifAnimatorHeader.setupImagesForRefreshstate { (refreshState) -> (images: [UIImage], duration: Double)? in if refreshState == .loading { var images = [UIImage]() for index in 1...47 { let image = UIImage(named: "loading\! images.append } return (images, 1.0) } else if refreshState == .pullToRefresh { var images = [UIImage]() for index in 1...47 { let image = UIImage(named: "loading\! images.append } return (images, 0.25) } return nil } tableView.zj_addRefreshHeader(gif, refreshHandler: {[weak self] in /// 多线程中不要使用 [unowned self] /// 注意这里的gcd是为了模拟网络加载的过程, 在实际的使用中, 不需要这段gcd代码, 直接在这里进行网络请求, 在请求完毕后, 调用分类方法, 结束刷新 dispatch_async(dispatch_get_global_queue, { for i in 0...50000 { if i <= 10 { self?.data.append } /// 延时 print } dispatch_async(dispatch_get_main_queue(), { self?.tableView.reloadData() /// 刷新完毕, 停止动画 self?.tableView.zj_stopHeaderAnimation })
  • 要么您能够将那个自定义的安装移到另外新建的class中, 举例
class TestNormal { class func normal() -> NormalAnimator { let normal = NormalAnimator.normalAnimator() /// 隐藏时间显示// normal.lastTimelabel.hidden = true /// 指定存储刷新时间的key, 如果不指定或设置为nil, 那么将会和其他未指定的使用相同的key(记录的时间相同, MJRefresh是所有的控件使用相同的时间的) normal.lastRefreshTimeKey = "DemoKey1" normal.setupDescriptionForState({ (refreshState ,refreshType) -> String in switch refreshState { case .loading: return "努力加载中" case .normal: return "休息中" case .pullToRefresh: if refreshType == .header { return "继续下下下下" } else { return "继续上上上上" } case .releaseToFresh: return "放开我" } }) return normal }}/// 使用方法 let footer = TestNormal.normal() tableView.zj_addRefreshFooter {[weak self] in dispatch_async(dispatch_get_global_queue, { for i in 0...50000 { if i <= 10 { self?.data.append } /// 延时 print } dispatch_async(dispatch_get_main_queue(), { self?.tableView.reloadData() self?.tableView.zj_stopFooterAnimation }

如上所述, 轻易写二个刷新控件照旧很轻巧的, 然而在落到实处的进度中有成都百货上千的内部原因供给调解, 譬喻刷新的时候要拍卖sectionHeader的停下难点... (这里直接借鉴了MJRefresh中的处理了), Demo地址

/** 代理*/@property(nonatomic,weak)id<AIRefreshViewDelegate> delegate;/** 填加的滑动视图*/@property(nonatomic,strong)UIScrollView *scrollView;/** 是否正在被刷新*/@property(nonatomic, assign,getter=isRefreshing)BOOL refreshing;/** 进度*/@property(nonatomic, assign)CGFloat progress;
  • 1.系统UITableView的一部分统筹观念
  • 2.自定义控件常用设计思路
  • 3.动画的求实运用
  • 4.手势的具体行使
  • 4.装X或多或少,非凡的代码风格
  • 5......
  • 格局大家必要达成5个
  • 私行颜色为了飞快区分视图,这里用了放肆颜色来差距,生成随机颜色的法子比较多.常见的拿走形式为如下:
/** 初始化方法 @param frame 初始frame @param scrollView 所要添加的滑动视图 @return 实体 */- (instancetype)initWithFrame:frame scrollView:(UIScrollView*)scrollView;/** 结束刷新 */- endRefreshing;/** 开始刷新 */- beginRefreshing;

再有多少个是管理Scrollview的拖拽手势和就要甘休拖拽代总管件(AIRefreshView这里作者并从未落到实处Scrollview的代理,只是写了法子名一样的函数,希望把外界的UIScrollview的代理在AIRefreshView控件中处理)

#define RandomColor [UIColor colorWithRed:arc4random_uniform/255.0 green:arc4random_uniform/255.0 blue:arc4random_uniform/255.0 alpha:1]
  • .m.h的点子讲完了,看看.m的性情,我们供给一个圆、飞机、背景图(这里飞机用的layer是想尽量使用轻量级的控件)

通过类方法实现:

+ (UIColor *)randomColor{ static BOOL seed = NO; if  { seed = YES; srandomtime; } CGFloat red = random()/RAND_MAX; CGFloat green = random()/RAND_MAX; CGFloat blue = random()/RAND_MAX; return [UIColor colorWithRed:red green:green blue:blue alpha:1.0f];//alpha为1.0,颜色完全不透明}
/** 圆CAShapeLayer */@property(nonatomic,strong)CAShapeLayer *ovalShapeLayer;/** 飞机layer*/@property(nonatomic,strong)CALayer *airplaneLayer;/** 背景图*/@property(nonatomic,weak)UIImageView *bgImageView;

大家在做公共控件的时候,可以把要做的某个捋一捋.其实我们在访谈户端开采能够类比网页的开拓.做的作业只是正是得到服务端给的数目,通过分裂的点子显示出来.个中就提到到:

先是是起始化方法开端化方法增多圆、飞机、背景

  • 1.多少:从客商端来看通常正是服务端给的json格式的数据
  • 2.样式:从顾客端支付来看正是安装各样控件的各类品质
  • 3.交互:笔者临时把那三样映射到UITableView上多少对应着DataSource代理,样式对应着大家得到多少今后自定义的cell差异体系(其实便是安装不一致属性为差异值),交互对应着Delegate代理.接下来大家也效仿则TabelView的代理写
- (instancetype)initWithFrame:frame scrollView:(UIScrollView*)scrollView{ self = [super initWithFrame:frame]; if  { self.scrollView = scrollView; _refreshing = NO; _progress = 0.; //add the background Image UIImageView *imageView = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"refresh-view-bg"]]; imageView.contentMode = UIViewContentModeScaleAspectFill; imageView.clipsToBounds = YES; self.bgImageView = imageView; [self addSubview:imageView]; //shapeLayer self.ovalShapeLayer = [CAShapeLayer layer]; self.ovalShapeLayer.strokeColor = [UIColor whiteColor].CGColor; self.ovalShapeLayer.fillColor = [UIColor clearColor].CGColor; self.ovalShapeLayer.lineWidth = 4.; self.ovalShapeLayer.lineDashPattern = @[@2,@3]; CGFloat refreshRadius = frame.size.height/2 *.8; self.ovalShapeLayer.path = [UIBezierPath bezierPathWithOvalInRect: CGRectMake(frame.size.width *.5 - refreshRadius, frame.size.height *.5 - refreshRadius, 2 * refreshRadius, 2 * refreshRadius)].CGPath; [self.layer addSublayer:self.ovalShapeLayer]; self.airplaneLayer = [CALayer layer]; UIImageView *airplaneImage = [[UIImageView alloc]initWithImage:[UIImage imageNamed:@"airplane"]]; self.airplaneLayer.contents = (__bridge id _Nullable)(airplaneImage.image.CGImage); self.airplaneLayer.bounds = CGRectMake(0, 0, airplaneImage.frame.size.width, airplaneImage.frame.size.height); self.airplaneLayer.position = CGPointMake(frame.size.width * .5 + frame.size.height *.5 *.8, frame.size.height * .5); [self.layer addSublayer:self.airplaneLayer]; } return self;}

系统TableView的DataSource代理

  • 接下去重点就在那多个代总管件在拖拽的代理函数中总括,内容顶上部分的偏移量,以及拖拽的快慢(因为大家的卡通片展现须求以此速度)
@protocol UITableViewDataSource<NSObject>@required- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section;// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath;@optional- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView; // Default is 1 if not implemented- (nullable NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section; // fixed font style. use custom view  if you want something different- (nullable NSString *)tableView:(UITableView *)tableView titleForFooterInSection:(NSInteger)section;// Editing// Individual rows can opt out of having the -editing property set for them. If not implemented, all rows are assumed to be editable.- tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath;// Moving/reordering// Allows the reorder accessory view to optionally be shown for a particular row. By default, the reorder control will be shown only if the datasource implements -tableView:moveRowAtIndexPath:toIndexPath:- tableView:(UITableView *)tableView canMoveRowAtIndexPath:(NSIndexPath *)indexPath;// Index- (nullable NSArray<NSString *> *)sectionIndexTitlesForTableView:(UITableView *)tableView __TVOS_PROHIBITED; // return list of section titles to display in section index view (e.g. "ABCD...Z#")- (NSInteger)tableView:(UITableView *)tableView sectionForSectionIndexTitle:(NSString *)title atIndex:(NSInteger)index __TVOS_PROHIBITED; // tell table which section corresponds to section title/index (e.g. "B",1))// Data manipulation - insert and delete support// After a row has the minus or plus button invoked (based on the UITableViewCellEditingStyle for the cell), the dataSource must commit the change// Not called for edit actions using UITableViewRowAction - the action's handler will be invoked instead- tableView:(UITableView *)tableView commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath;// Data manipulation - reorder / moving support- tableView:(UITableView *)tableView moveRowAtIndexPath:(NSIndexPath *)sourceIndexPath toIndexPath:(NSIndexPath *)destinationIndexPath;@end

理所必然大家也没须要把系统的代办三个二个模仿则写完,只要本身力所能致清楚到何等依据系统API的宏图观念来统一计划和谐写的代码就行了.

-scrollViewDidScroll:(UIScrollView *)scrollView { CGFloat offsetY = MAX(-(scrollView.contentOffset.y+scrollView.contentInset.top), 0.); _progress = MIN(MAX(offsetY / self.frame.size.height, 0.), 1.); if (!self.isRefreshing) { [self redrawFromProgress:self.progress]; }}

/** 通过进度画圆,和飞机 @param progress 进度 */- redrawFromProgress:progress { self.airplaneLayer.opacity = _progress; self.ovalShapeLayer.strokeEnd = _progress;}

本身规划的DataSource代理

在拖拽停止的时等候法庭判果断是还是不是须要开展刷新动作,以及调用刷新动画、实现,刷新控件代理。

@protocol XLCircleMenuDataSource <NSObject>@required- (NSInteger)numberOfCircleViewForCircleMenu:(XLCircleMenu *)circleMenu;- (UIButton *)circleMenu:(XLCircleMenu *)circleMenu circleViewAtIndex:(NSInteger)index;@optional- lengthForCircleMenu:(XLCircleMenu *)circleMenu;- centerViewForCircleMenu:(XLCircleMenu *)circleMenu;@end@protocol XLCircleMenuDelegate <NSObject>@optional- circleMenu:(XLCircleMenu *)circleMenu didClickCircleView:(UIButton *)circleView;@end
-scrollViewWillEndDragging:(UIScrollView *)scrollView withVelocity:velocity targetContentOffset:(inout CGPoint *)targetContentOffset { if (!self.isRefreshing && self.progress >= 1.) { if (self.delegate && [self.delegate respondsToSelector:@selector(refreshViewDidRefresh:)]) { [self.delegate refreshViewDidRefresh:self]; [self beginRefreshing]; } }}

注明小编就一直不加了,因为OC最棒的就是见名知意.

骨干的起来终结方法

咱俩在设计类的时候,做得相比好的,要求思考属性的读写情形,常常只把供给揭破给外界知道的才爆出出去.

- beginRefreshing { self.refreshing = YES; [UIView animateWithDuration:.3 animations:^{ UIEdgeInsets newInsets = self.scrollView.contentInset; newInsets.top += self.frame.size.height; self.scrollView.contentInset = newInsets; }];}- endRefreshing { self.refreshing = NO; [UIView animateWithDuration:.3 delay:0. options:(UIViewAnimationOptionCurveEaseOut) animations:^{ UIEdgeInsets newInsets = self.scrollView.contentInset; newInsets.top -= self.frame.size.height; self.scrollView.contentInset = newInsets; } completion:^(BOOL finished) { }];}

然后在为类增多属性的时候,供给思考分界面和功用,分界面和成效供给在写代码在此以前就应该知道的.比方:

  • 动画上面已经完毕了中央的基础代谢,不过以后缺乏动画。你应当将起来动画放在获取数据的时候,代码增添在beginRefreshing终极首先是圈子
  • 1.具体有微微个可点的小圆,应该通过代办来传递的,并且小圆的个数应该任何时间任何地方在三个地点选拔,所以能够定义为属性,何况个中有贰个大圆也是经过代理传递的,也亟需定义多个属性来接收.于是能够定义出五个属性.

有哪些属性我们还是能够一向从效果与利益和分界面上一直去思虑.

 CABasicAnimation *strokeStartAnimation = [CABasicAnimation animationWithKeyPath:@"strokeStart"]; strokeStartAnimation.fromValue = @-.5; strokeStartAnimation.toValue = @1.; CABasicAnimation *strokeEndAnimation = [CABasicAnimation animationWithKeyPath:@"strokeEnd"]; strokeEndAnimation.fromValue = @0.; strokeEndAnimation.toValue = @1.; CAAnimationGroup *strokeAniamtionGroup = [CAAnimationGroup animation]; strokeAniamtionGroup.duration = 1.5; strokeAniamtionGroup.repeatDuration = 5.; strokeAniamtionGroup.animations = @[strokeStartAnimation,strokeEndAnimation]; [self.ovalShapeLayer addAnimation:strokeAniamtionGroup forKey:nil];
  • 2.基于位置的解析各样思念我们界面上的因素和大家要求调控的属性.大致定义出了之类属性(落到实处的思绪相当多,不自然非要那样定义)

这段代码创立了多个卡通:第贰个strokeStart从-0.5到1.0那是一种囤积居奇的章程,当动画在-0.5到0.0的大运不会做任何事。因为那一个值只是表示不可知部分的样子。飞机动画

 //飞机动画 CAKeyframeAnimation *flightAnimation = [CAKeyframeAnimation animationWithKeyPath:@"position"]; flightAnimation.path = self.ovalShapeLayer.path; flightAnimation.calculationMode = kCAAnimationPaced; //旋转 CABasicAnimation *airplanOrientationAnimation = [CABasicAnimation animationWithKeyPath:@"transform.rotation"]; airplanOrientationAnimation.fromValue = @0.; airplanOrientationAnimation.toValue = @; CAAnimationGroup *flightAnimationGroup = [CAAnimationGroup animation]; flightAnimationGroup.duration = 1.5; flightAnimationGroup.repeatDuration = 5.; flightAnimationGroup.animations = @[flightAnimation,airplanOrientationAnimation]; [self.airplaneLayer addAnimation:flightAnimationGroup forKey:nil];
@property (nonatomic, weak) id<XLCircleMenuDataSource> dataSource;@property (nonatomic, weak) id<XLCircleMenuDelegate> delegate;@property (nonatomic, assign, readonly) CGPoint centerPoint;@property (nonatomic, assign, readonly) CGFloat menuLength;@property (nonatomic, assign, readonly) NSInteger numberOfCircleView;@property (nonatomic, strong, readonly) UIView *centerCircleView;@property (nonatomic, strong, readonly) UIView *circleMenuView;

飞机动画首要运用CAKeyframeAnimation动画使飞机依照圆的门径走,设置calculationMode属性为kCAAnimationPaced使动画以二个定点的速度何况保障沿着那一个门路走。当然也要安装他的团团转角度通过airplanOrientationAnimation动画

  • 2.来看一下内需展开什么操作吧首先明确是显示和隐形了,倘使虚构得多一些,大家得以在彰显可能遮盖之后做二个回调给使用则者.然后就是点击的种种管理,在概念代理的时候,大家曾经仿照系统的TableView的Delegate写了几个代理了.所以点击操作能够一贯通过代理去管理

末尾的功力应该是那般:

简轻便单一点的话初步化的话,我们就让使用者把必要的参数都传开进来吧.最后设计出的措施如下:

必赢的网址登录 9最终效果.png点击这里能够查阅源码第22个cell,喜欢的给个star必赢的网址登录 10源码地方.png

- (instancetype)initFromPoint:centerPoint withDataSource:(id<XLCircleMenuDataSource>)dataSource andDelegate:(id<XLCircleMenuDelegate>)delegate;- showMenu;- showMenuWithCompletion:) completion;- closeMenu;- closeMenuWithCompletion:) completion;

到近期甘休整套类的作风基本就打好了.

先天该去具体落成大家的设计了第一步定义属于的民用属性第二步开端写方法吧

  • 初阶化方法
  • 子视图的创造
  • 手势增添
  • 完成动画

接下去把用到的关键技能和章程

视图的拖拽是因而UITapGestureRecognizer达成的这一章有关iOS手势相关的牵线能够参照一下那篇文章:iOS手势识别

  1. 拉长手势到钦赐视图,设置手势代理,依据供给独特管理
UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(closeCircelMenu:)]; [self addGestureRecognizer:tapGesture]; tapGesture.delegate = self;

此处剖断要是点击的是button,则毫不接收了

#pragma mark - UIGestureRecognizerDelegate- gestureRecognizer:(UIGestureRecognizer *)gestureRecognizer shouldReceiveTouch:(UITouch *)touch{ BOOL should = YES; if([touch.view isKindOfClass:[UIButton class]]){ should = NO; } return should;}

上面是正是拖拽部分的代码,用到的是transform一旦移动,就改变视图的frame

 if ((panGesture.state == UIGestureRecognizerStateChanged) || (panGesture.state == UIGestureRecognizerStateEnded)) { CGPoint translation = [panGesture translationInView:self]; CGRect radialMenuRect = self.circleMenuView.frame; radialMenuRect.origin.x += translation.x; radialMenuRect.origin.y += translation.y; self.circleMenuView.frame = radialMenuRect; [self placeRadialMenuElementsAnimated:NO]; [panGesture setTranslation:CGPointZero inView:self]; }

必赢的网址登录 11移动.gif

相似在规划代理重回参数的时候都会计统计一希图三个个性用来保存代理重返的参数,比如:

 _menuLength = 50; if(self.dataSource && [self.dataSource respondsToSelector:@selector(lengthForCircleMenu:)]){ _menuLength = [self.dataSource lengthForCircleMenu:self]; } _numberOfCircleView = [self.dataSource numberOfCircleViewForCircleMenu:self];

此处就由此是不是有代理来规定属性的值,当然假设代理是必需的就没须求去看清了(respondsToSelector),相当于通过代办来给属性赋值.当大家想传递事件给代理的时候,能够因此抬高事变给子视图,然后代理出去,如下:

 UIButton *element = [self.dataSource circleMenu:self circleViewAtIndex:i]; if(self.maxW < element.frame.size.width) { self.maxW = element.frame.size.width; }else { } element.userInteractionEnabled = YES; element.alpha = 0; element.tag = i; [element addTarget:self action:@selector(didTapButton:) forControlEvents:UIControlEventTouchUpInside]; [self.elementsArray addObject:element];

在处总管件的时候调用代理

-didTapButton:(UIButton *)sender { [self.delegate circleMenu:self didClickCircleView:sender];}

由于视图的布局和拖动的意义是辅车相依,所以布局和创办应该单独出来.其实咱们实际开销中也应该那样做.在用frame布局的时候,笔者日常习于旧贯把布局的操作放在layoutSubview里面,是的始建要不在早先化的时候创立实现,要不要懒加载额方式成立.

先来寻访倘使不把布局和手势关联是何许的效果.

必赢的网址登录 12固执的认为.gif

看起来是或不是非常的执着,上面就详细讲一讲使用到的布局和卡通片

这种草瓣形的布局是即时可比脑瓜疼的,牵涉到了角度总结(asinf:逆正弦函数,acosf:逆余弦函数),长度百分比换来角度百分比先看图:

必赢的网址登录 13逆正弦函数必赢的网址登录 14逆余弦函数.png

即刻搞这一个的时候,反正自身是骨干把那么些东西归还了初级中学年古稀之年师.

为了促成能够当菜单靠边的时候,小圆能够适应机关旋转角度,大家供给思索当上面缘是哪个方向.类似于:

必赢的网址登录 15

具体思路:

  • 依据当下美食指南的x,y的正,负决定是在哪些方向上的边缘.
  • 依照x,y负数的断然值能够知情当前偏移了荧屏多少
  • 根据x,y偏移的品位改造整个可知的弧度,得到可变的弧度范围
  • 遍历小圆,更改各类小圆的宗旨点

上代码吧:

 // 顶部边缘 if(self.circleMenuView.frame.origin.y < 0 && self.circleMenuView.frame.origin.x > 0 && CGRectGetMaxX(self.circleMenuView.frame) < self.frame.size.width){ // 部分显示 fullCircle = NO; // 得到顶部偏移多少 CGFloat d = -(self.circleMenuView.frame.origin.y + self.menuLength); // 获得起始角度的位置 startingAngle = asinf((d + (self.maxW / 2.0) + 5) / (self.menuLength+radiusToAdd)); // 获取总共显示的晚饭 usableAngle = M_PI - (2 * startingAngle); } // 左边 if(self.circleMenuView.frame.origin.x < 0){ fullCircle = NO; // 开始的角度 if(self.circleMenuView.frame.origin.y > 0){ CGFloat d = -(self.circleMenuView.frame.origin.x + self.menuLength); startingAngle = -acosf / (self.menuLength + radiusToAdd)); } else { CGFloat d = -(self.circleMenuView.frame.origin.y + self.menuLength); startingAngle = asinf((d + self.maxW / 2.0+ 5) / (self.menuLength + radiusToAdd)); } // 结束角度 if(CGRectGetMaxY(self.circleMenuView.frame) <= self.frame.size.height){ if(self.circleMenuView.frame.origin.y > 0){ usableAngle = -2 * startingAngle; } else { CGFloat d = -(self.circleMenuView.frame.origin.x + self.menuLength); CGFloat virtualAngle = acosf / (self.menuLength + radiusToAdd)); usableAngle = 2 * virtualAngle -(virtualAngle+startingAngle); } } else { CGFloat d = (CGRectGetMaxY(self.circleMenuView.frame) - self.frame.size.height -self.menuLength); CGFloat virtualAngle = -asinf / (self.menuLength + radiusToAdd)); usableAngle = -startingAngle+virtualAngle; } }

底层和侧边的完成格局同顶端和左边手的思路是同样的

末段起初布局各样小圆

for(int i = 0; i < [self.elementsArray count]; i++){ UIButton *element = [self.elementsArray objectAtIndex:i]; element.center = CGPointMake(self.circleMenuView.frame.size.width / 2.0, self.circleMenuView.frame.size.height / 2.0); double delayInSeconds = 0.025*i; void (^elementPositionBlock) = ^{ element.alpha = 1; [self.circleMenuView bringSubviewToFront:element]; // 这一段比较复杂,参考的了别人写的 CGPoint endPoint = CGPointMake(self.circleMenuView.frame.size.width/2.0+(_menuLength+radiusToAdd)*(cos(startingAngle+usableAngle/(self.numberOfCircleView-(fullCircle ? 0 :1))*, self.circleMenuView.frame.size.height/2.0+(_menuLength+radiusToAdd)*(sin(startingAngle+usableAngle/(self.numberOfCircleView-(fullCircle ? 0 :1))*); element.center = endPoint; }; if { dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (delayInSeconds * NSEC_PER_SEC)); dispatch_after(popTime, dispatch_get_main_queue(), ^{// 延迟一下做动画的时间 [UIView animateWithDuration:0.25 animations:elementPositionBlock]; }); } else { elementPositionBlock(); }; }

音讯动画相比轻便,正是退换各类子视图的center.和折射率,然后渐变消失.动画做完事后再里面移除视图就能够了

for(int i = 0; i < [self.elementsArray count]; i++){ UIButton *element = [self.elementsArray objectAtIndex:i]; double delayInSeconds = 0.025*i; dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (delayInSeconds * NSEC_PER_SEC)); dispatch_after(popTime, dispatch_get_main_queue(), ^{ [UIView animateWithDuration:0.25 animations:^{ element.alpha = 0; element.center = CGPointMake(self.centerCircleView.frame.size.width/2.0, self.centerCircleView.frame.size.height/2.0); }]; }); } double delayInSeconds = 0.25+0.025*[self.elementsArray count]; dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (delayInSeconds * NSEC_PER_SEC)); dispatch_after(popTime, dispatch_get_main_queue(), ^{ [UIView animateWithDuration:0.25 animations:^{ self.centerCircleView.alpha = 0; self.alpha = 0; } completion:^(BOOL finished) { [self.centerCircleView removeFromSuperview]; [self removeFromSuperview]; if(completion) completion;

参照他事他说加以考察项目:AwesomeMenu

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