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 .Cancel
presentViewController(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 = .popover
let ppc = alert.popoverPresentationController
ppc?.barButtonItem = XXButton

Alerts

var alert = UIAlertController(title:"", message:"", preferredStyle: UIAlertControllerStyle.Alert)
alert.addAction(UIAlertAction(title:String, style:UIAlertActionStyle) { (action:UIAlertAction) -> Void in
let tf = self.alert.textFields?.first as? UITextField
if 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.invalidate
timer.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