ios 程序窗口适应设备方向改变

//在初始化里注册窗口改变通知，设备窗口改变会发送此通知
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil {

self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];

if (self) {

　　　　[[NSNotificationCenterdefaultCenter]addObserver:selfselector:@selector(change:) name:UIDeviceOrientationDidChangeNotification object:nil];

}

returnself;

}

-(void) change:(NSNotification*)nt

{

CGFloat width = [[UIScreen mainScreen]bounds].size.width * [[UIScreen mainScreen]scale];

CGFloat height = [[UIScreen mainScreen]bounds].size.height * [[UIScreen mainScreen]scale]; //乘以缩放系数

UIDeviceOrientation orientation = [UIApplication sharedApplication].statusBarOrientation;

switch (orientation) {

　　case UIDeviceOrientationPortrait:

　　case UIDeviceOrientationPortraitUpsideDown:

　　　　self.view.frame = CGRectMake(0, 0, width, height);

　　　　break;

　　case UIDeviceOrientationLandscapeLeft:

　　case UIDeviceOrientationLandscapeRight:

　　　　self.view.frame = CGRectMake(0, 0, height, width);

　　　　break;

　　default:

break;

}