iphone开发之横屏与竖屏在不同视图之间的切换

iphoneioshierarchy

有两个视图，横屏视图和纵屏视图，当iphone的方位变化的时候，这两个视图相互切换。

1。两个视图：PortraitView和LandscapeView ，分别标示纵屏和横屏。

2。一个控制器，RootViewController，根控制器。

3。在RootViewController.m中有以下代码

-(void)willAnimateRotationToInterfaceOrientation:(UIInterfaceOrientatio n)toInterfaceOrientation duration:(NSTimeInterval)duration

{

if (UIInterfaceOrientationIsPortrait(toInterfaceOrientation)) {

[landscape removeFromSuperview];

[self.view addSubview:portrait];

}

if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {

[portrait removeFromSuperview];

[self.view addSubview:landscape];

}

}

// Implement loadView to create a view hierarchy programmatically, without using a nib.

- (void)loadView {

UIControl *back = [[UIControl alloc] initWithFrame:[[UIScreen mainScreen]bounds]];

back.backgroundColor = [UIColor grayColor];

self.view = back;

[back release];

}

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.

- (void)viewDidLoad {

[super viewDidLoad];

portrait = [[PortraitView alloc] initWithFrame:CGRectMake(10, 10, 300, 440)];

portrait.backgroundColor = [UIColor yellowColor];

[portrait addButton];

landscape = [[LandscapeView alloc] initWithFrame:CGRectMake(10, 10, 460, 280)];

landscape.backgroundColor = [UIColor greenColor];

[self.view addSubview:portrait];

}

// Override to allow orientations other than the default portrait orientation. -

(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)in terfaceOrientation {

// Return YES for supported orientations.

return YES;

}