CGRect screenBounds = [ [UIScreen mainScreen]bounds];//返回的是带有状态栏的Rect     NSLog(@"%@", NSStringFromCGRect(screenBounds));    CGRect viewBounds = [ [UIScreen mainScreen]applicationFrame];//不包含状态栏的Rect     NSLog(@"%@", NSStringFromCGRect(viewBounds));    CGRect statusBarRect = [[UIApplication sharedApplication]statusBarFrame];     NSLog(@"%@", NSStringFromCGRect(statusBarRect));