ios - 'supportedInterfaceOrientations' : - Warning 实现中的返回类型冲突

Question

升级到 Xcode 7.0 后，我在 UIViewControllerRotation 方法中收到警告:- (NSUInteger)supportedInterfaceOrientations:

Conflicting return type in implementation of 'supportedInterfaceOrientations': 'UIInterfaceOrientationMask' (aka 'enum UIInterfaceOrientationMask') vs 'NSUInteger' (aka 'unsigned int')

为什么会这样，我该如何解决？

编辑: 如果你去定义你会看到返回类型实际上已经改变了: - (UIInterfaceOrientationMask)supportedInterfaceOrientations NS_AVAILABLE_IOS(6_0); 但更改代码中的返回类型不会使警告静音。

Answer 1

试试这个调整:

#if __IPHONE_OS_VERSION_MAX_ALLOWED < 90000  
- (NSUInteger)supportedInterfaceOrientations  
#else  
- (UIInterfaceOrientationMask)supportedInterfaceOrientations  
#endif  
{
   return UIInterfaceOrientationMaskPortrait;
}