斯坦福Developing iOS 8 Apps学习笔记（七）

Unwinded segue

@IBAction fund XX(segue: UIStoryboardSegue) {

}
然后在storyboard中viewController的exit选择退出到哪个unwounded segue

Alerts & ActionSheets

ActionSheet

var alert = UIAlertController(title:"", message:"", preferredStyle: UIAlertControllerStyle.ActionSheet)alert.addAction(UIAlertAction(title:String, style:UIAlertActionStyle, handler: (action:UIAlertAction) -> Void))//UIAlertActionStyle .Defualt蓝字 .Destructive红字 .CancelpresentViewController(alert, animated:true, completion:nil)

在iPad上需要指定Popover来源，iPhone上写了这些也没关系，不会有影响

alert.modalPresentationStyle = .popoverlet ppc = alert.popoverPresentationControllerppc?.barButtonItem = XXButton

Alerts

var alert = UIAlertController(title:"", message:"", preferredStyle: UIAlertControllerStyle.Alert)alert.addAction(UIAlertAction(title:String, style:UIAlertActionStyle) { (action:UIAlertAction) -> Void inlet tf = self.alert.textFields?.first as? UITextFieldif tf!= nil {}}alert.addTextFieldWithConfigurationHandler { (textField) in    textField.placeholder = ""}//此方法可以多次调用

NSTimer

NSTimer.scheduledTimerWithTimeInterval(_ seconds:NSTimeInterval, target:AnyObject, selector:":", userInfo:AnyObject, repeats:Bool)timer.invalidatetimer.tolerance =10 //一般设置成1/10的timeInterval

View Animation

动画的分类

• Animating UIView properties
• Animation of View Controller transitions
• Core Animation
• Dynamic Animation

UIView Animation

改变属性时属性会立即生效而不是跟随动画变化
可以进行动画的是
- frame
- transform(translation, rotation, scale)
- alpha(opacity)

class fun animateWithDuration(duration:NSTimeInterval, delay:NSTimeInterval, options:UIViewAnimationOptions, animations:()->Void, completion:((finished:Bool)->Void)?)

UIViewAnimationOptions有
- BeginFromCurrentState（打断其他相同属性的动画）
- AllowUserInteraction（允许手势识别）
- LayoutSubview（在父视图动画中子视图重新排列）
- Repeat
- Autoreverse（先动画再动画回来）
- OverrideInheritedDuration
- OverrideInheritedCurve
- AllowAnimatedContent
- CurveEaseInEaseOut
- CurveEaseIn
- CurveLinear
- UIViewAnimationOptionFlipFrom
另有
- UIViewAnimationOptionFlipFrom{Left,Right,Top,Bottom} 翻转
- UIViewAnimationOptionTransitionCroosDissolve 溶解
- UIViewAnimationOptionTransitionCurl{Up, Down} 卷曲
可以用于

UIView.transitionWithView(view:UIView,duration:NSTimeInterval, options:UIViewAnimationOptions, animations: ()->Void, completion:((finished:Bool)->Void)?)UIView.transitionFromView(fromView:UIView, toView:UIView,duration, options, completion)

使用UIViewAnimationOptionShowHideTransitionViews来隐藏view，否则fromView会removeFromSuperView，toView会添加进来