为什么UISupportedInterfaceOrientations设置不会影响UIViewController的行为？
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Xcode（4）突出显示了UISupportedInterfaceOrientations设置，但是无论我如何设置，它似乎都不会影响基本应用程序的功能。 Xcode模板插入注释掉的实现，用于以编程方式报告对以下内容的支持：
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
// Return YES for supported orientations.
return (interfaceOrientation == UIInterfaceOrientationPortrait);
}
/**
* This implementation coordinates the app\'s orientation support with the app
* bundle settings, simplifying the configuration of the app\'s support for its
* different orientations.
*/
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
static NSString *_orientationFlagNames[] = {
Nil, // UIDeviceOrientationUnknown
@\"UIInterfaceOrientationPortrait\", // UIDeviceOrientationPortrait,
@\"UIInterfaceOrientationPortraitUpsideDown\",// UIDeviceOrientationPortraitUpsideDown,
@\"UIInterfaceOrientationLandscapeRight\", // UIDeviceOrientationLandscapeLeft [sic]
@\"UIInterfaceOrientationLandscapeLeft\" // UIDeviceOrientationLandscapeRight [sic]
// UIDeviceOrientationFaceUp
// UIDeviceOrientationFaceDown
};
NSArray *supportedOrientation = [[[NSBundle mainBundle] infoDictionary] objectForKey:@\"UISupportedInterfaceOrientations\"];
BOOL shouldRotate = (interfaceOrientation < sizeof(_orientationFlagNames)/sizeof(NSString*)
&& [supportedOrientation containsObject:_orientationFlagNames[interfaceOrientation]]);
return shouldRotate;
}
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屡倒雷图
值指示应用程序支持的方向，而值指示特定视图可用的方向。 如果您看到，显然会提到mentioned2ѭ值可帮助iOS选择启动应用程序的初始方向。