iOS屏幕旋转总结

 1 /**
 2  *  当手机屏幕发生左右横屏变化时，我们需根据此时的设备方向做出相应的调整
 3  *  例如，在ViewController中，我们需要监控手机屏幕是否转动了，需要在通知中心中注册通知
 4  */
 5 - (void)viewWillAppear:(BOOL)animated{
 6     [super viewWillAppear:animated];
 7     
 8     //注册通知，监测手机屏幕变化
 9     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(statusBarOrientationChange:) name:UIApplicationDidChangeStatusBarOrientationNotification object:nil];
10 }
11 
12 /**
13  *  当手机屏幕发生变化时，会回调下面方法
14  */
15 - (void)statusBarOrientationChange:(NSNotification *)notification{
16     UIInterfaceOrientation orientation = [[UIApplication sharedApplication] statusBarOrientation];
17     
18     if (orientation == UIInterfaceOrientationLandscapeRight)//home键向右
19     {
20         NSLog(@"home键向右");
21     }
22     if (
23         orientation ==UIInterfaceOrientationLandscapeLeft) // home键靠左
24     {
25         NSLog(@"home键向左");
26     }
27     
28     if (orientation == UIInterfaceOrientationPortrait)// home键靠下
29     {
30         NSLog(@"home键靠下");
31     }
32     
33     if (orientation == UIInterfaceOrientationPortraitUpsideDown)// home键颠倒
34     {
35         NSLog(@"home键靠颠倒");
36     }
37 }

1 if (orientation == UIInterfaceOrientationPortraitUpsideDown)// home键颠倒
2     {
3         NSLog(@"home键靠颠倒");
4     }

 1 - (void)viewWillAppear:(BOOL)animated{
 2     [super viewWillAppear:animated];
 3     
 4     //注册通知 监测设备方向的变化
 5     [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(orientChange:) name:UIDeviceOrientationDidChangeNotification object:nil];
 6     
 7 }
 8 
 9 //当设备的物理方向发生变化时会调
10 - (void)orientChange:(NSNotification *)noti{
11     
12     NSDictionary* ntfDict = [noti userInfo];
13     
14     UIDeviceOrientation  orient = [UIDevice currentDevice].orientation;
15     
16     switch (orient)
17     {
18         case UIDeviceOrientationPortrait:
19             NSLog(@"home靠下");
20             break;
21         case UIDeviceOrientationLandscapeLeft:
22             NSLog(@"home靠右边");
23             
24             break;
25         case UIDeviceOrientationPortraitUpsideDown:
26             NSLog(@"home靠上");
27             break;
28         case UIDeviceOrientationLandscapeRight:
29             NSLog(@"home靠左边");
30             break;
31             
32         default:
33             break;
34     }
35 }