ios8中的UIScreen

let orientation: UIInterfaceOrientation = UIApplication.sharedApplication().statusBarOrientation
     println("Currently landscape: " + ((orientation == UIInterfaceOrientation.LandscapeLeft||orientation == UIInterfaceOrientation.LandscapeRight) ?"YES":"NO"))
     println("UIScreen.mainScreen().bounds: \(UIScreen.mainScreen().bounds)")
     println("UIScreen.mainScreen().applicationFrame: \(UIScreen.mainScreen().applicationFrame)")

 在ios7中輸出：

Currently landscape: NO

UIScreen.mainScreen().bounds: (0.0,0.0,320.0,568.0)

UIScreen.mainScreen().applicationFrame: (0.0,20.0,320.0,548.0)

Currently landscape: YES

UIScreen.mainScreen().bounds: (0.0,0.0,320.0,568.0)

 

UIScreen.mainScreen().applicationFrame: (20.0,0.0,300.0,568.0)

 

在ios8中輸出：

Currently landscape: NO

UIScreen.mainScreen().bounds: (0.0,0.0,320.0,568.0)

UIScreen.mainScreen().applicationFrame: (0.0,20.0,320.0,548.0)

Currently landscape: YES

UIScreen.mainScreen().bounds: (0.0,0.0,568.0,320.0)

UIScreen.mainScreen().applicationFrame: (0.0,0.0,568.0,320.0)

 

結論：

一、在ios7中UIScreen.mainScreen().bounds是固定不變的值，在ios8中他的值是隨橫豎屏改變的！

爲了在ios8中獲得原來的效果能夠：

+ (CGSize)screenSize {
    CGSize screenSize = [UIScreen mainScreen].bounds.size;
    return CGSizeMake(MIN(screenSize.width, screenSize.height), MAX(screenSize.width, screenSize.height));
}

 

二、

在ios8中增長了2個屬性：

nativeBounds :  屏幕像素，不隨橫豎平改變的！

nativeScale   ：1(non retina)/2(retina)/3(retina hd)

https://developer.apple.com/library/ios/documentation/UIKit/Reference/UIScreen_Class/index.html#//apple_ref/occ/instp/UIScreen/nativeBounds

ios8輸出：

Currently landscape: YES

UIScreen.mainScreen().bounds: (0.0,0.0,568.0,320.0)

UIScreen.mainScreen().applicationFrame: (0.0,20.0,568.0,300.0)

UIScreen.mainScreen().nativeBounds: (0.0,0.0,640.0,1136.0)

UIScreen.mainScreen().nativeScale: 2.0

Currently landscape: NO

UIScreen.mainScreen().bounds: (0.0,0.0,320.0,568.0)

UIScreen.mainScreen().applicationFrame: (0.0,20.0,320.0,548.0)

UIScreen.mainScreen().nativeBounds: (0.0,0.0,640.0,1136.0)

 

UIScreen.mainScreen().nativeScale: 2.0

 

三、從UIScreen.mainScreen().applicationFrame輸出值看出，ios8默認橫屏statusbar是隱藏掉了。你能夠根據plist中

View controller-based status bar appearance的值的不一樣來用        

 

UIApplication.sharedApplication().setStatusBarHidden(false, withAnimation: UIStatusBarAnimation.None)

 

或

override func prefersStatusBarHidden() -> Bool {
      return false

  }

顯示橫屏statusbar