iOS横竖屏开发(监听)

项目涉及横屏竖屏都要开发的时候，并要设计两个UI； 所以监听横竖屏的变化的是必须的

- (void)viewWillAppear:(BOOL)animated{

[super viewWillAppear:animated];[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientChange:) name:UIDeviceOrientationDidChangeNotification object:nil];

}

- (void)dealloc{

[[NSNotificationCenter defaultCenter] removeObserver:self];

}

- (void)orientChange:(NSNotification *)notification{

CGFloat height = [UIScreen mainScreen].bounds.size.height;

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

CGFloat  index = 0 ;

UIDeviceOrientation  orient = [UIDevice currentDevice].orientation;

if (orient == UIDeviceOrientationPortrait) {

NSLog(@"竖屏");

//        index = width;

//        width = height;

//        height = index;

}else  if (orient == UIDeviceOrientationLandscapeLeft){

NSLog(@"横屏");

index = width;

width = height;

height = index;

}

[self.view.subviews makeObjectsPerformSelector:@selector(removeFromSuperview)];

}