UIAppearance setTranslucent错误：非法属性类型，c表示外观设置器，_installAppearanceSwizzleForSetter

试用iOS 7做了：

[[UINavigationBar appearance] setTranslucent:NO]; 

遇到了崩溃和错误：

 *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** Illegal property type, c for appearance setter, _installAppearanceSwizzleForSetter:' *** First throw call stack: (0x16ad9b8 0x142e8b6 0x16ad7ab 0x72163d 0x724c34 0x169daca 0x169d8de 0x6c09 0x228ea9 0x2296e9 0x22ab5e 0x240a6c 0x240fd9 0x22c7d5 0x35a4906 0x35a4411 0x16293e5 0x162911b 0x1653b30 0x165310d 0x1652f3b 0x22a2b1 0x22c4eb 0x6f3d 0x1d0d725) libc++abi.dylib: terminating with uncaught exception of type NSException 

其他调用工作正常：例如。

 [[UINavigationBar appearance] setBarStyle: UIBarStyleBlack]; 

当我在本地设置半透明时，它不会崩溃：

 [self.navigationController.navigationBar setTranslucent:NO]; 

我假设这是特定于iOS 7，但还没有在iOS 6中尝试相同的东西。

Answer 1

 [[UINavigationBar appearance] setTranslucent:NO] 

它不适用于iOS 6.它仅适用于iOS 7以上版本。

Answer 2

这是解决它的代码。 问题是UIAppearance不适用于BOOL类型。 这不应成为拒绝应用的理由，因为它使用标准（尽管是hacky）程序。 玩的开心。

 @protocol _UITranslucentThingHack @property (nonatomic) BOOL translucent; @end @interface UIView (_UITranslucentAppearanceProxyHack) @property (nonatomic) NSNumber * translucentPropertyAsObject; @end @implementation UIView (_UITranslucentAppearanceProxyHack) -(void)setTranslucentPropertyAsObject:(NSNumber *)translucentPropertyAsObject { if([self respondsToSelector:@selector(setTranslucent:)]) { id<_uitranslucentthinghack> trans = (id)self; trans.translucent = [translucentPropertyAsObject boolValue]; } } -(NSNumber*)translucentPropertyAsObject { if([self respondsToSelector:@selector(setTranslucent:)]) { id<_uitranslucentthinghack> trans = (id)self; return @(trans.translucent); } return nil; } @end 

Answer 3

我用自己的类别解决了这个问题，这样我仍然可以像普通方式一样使用UIAppearance。

 @interface UINavigationBar (MMTranlucenceUIAppearance) @property(nonatomic,assign,getter=isMMTranslucent) NSInteger LYTranslucent NS_AVAILABLE_IOS(3_0) UI_APPEARANCE_SELECTOR; // Default is NO on iOS 6 and earlier. Always YES if barStyle is set to UIBarStyleBlackTranslucent @end @implementation UINavigationBar (MMTranlucenceUIAppearance) // it appears that UIAppearance fails with BOOL -(NSInteger)isMMTranslucent { return self.translucent ? 0 : 1; } -(void)setMMTranslucent:(NSInteger)translucent { self.translucent = (translucent == 0) ? NO : YES; } @end 

Answer 4

不知道iOS 7的内容。但在iOS6中，根据文档，您无法将半透明属性设置为UINavigationBar的UIAppearance对象。 有时候它会显示自动完成的所有可能性，也有不受支持的可能性