iOS 如何获取屏幕大小

 1
 2     UIScreen *currentScreen = [UIScreen  mainScreen];
 3
 4     NSLog(@"applicationFrame.size.height = %f",currentScreen.applicationFrame.size.height);
 5
 6     NSLog(@"applicationFrame.size.width = %f",currentScreen.applicationFrame.size.width);
 7
 8     NSLog(@"applicationFrame.origin.x = %f",currentScreen.applicationFrame.origin.x);
 9
10     NSLog(@"applicationFrame.origin.y = %f",currentScreen.applicationFrame.origin.y);
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12     NSLog(@"bounds.x = %f",currentScreen.bounds.origin.x);
13
14     NSLog(@"bounds.y = %f",currentScreen.bounds.origin.y);
15
16     NSLog(@"bounds.height = %f",currentScreen.bounds.size.height);
17
18     NSLog(@"bounds.width = %f",currentScreen.bounds.size.width);
19
20     NSLog(@"brightness = %f",currentScreen.brightness);

更新：

iOS 9 之后：使用 [UIScreen  mainScreen].bounds代替 [UIScreen  mainScreen].applicationFrame