如果我有一个指向UIViewController的指针,当更改interfaceOrientation而不修改控制器的代码时,我可以收到通知吗？
检测设备方向的变化是最好的选择,然后查看UIViewController是否会旋转(d)？
解决方法
您可以使用NSNotificationCenter：
[[NSNotificationCenter defaultCenter] addobserver:self // put here the view controller which has to be notified
selector:@selector(orientationChanged:)
name:@"UIDeviceOrientationDidChangeNotification"
object:nil];
- (void)orientationChanged:(NSNotification *)notification{
UIDeviceOrientation orientation = [[UIDevice currentDevice] orientation];
//do stuff
NSLog(@"Orientation changed");
}