UIViewController插入UINavigationController堆棧失去UIAppearance設置

Question

我有一個UIAppearance設置爲我的導航欄。

[[UINavigationBar appearance] setTitleTextAttributes: [self navigationBarTitleTextAttributes]]; 



-(NSDictionary *)navigationBarTitleTextAttributes 
{ 
    // UINavigationBar title 
    NSNumber *navBarTitleShadowOpacity = [self.personalityDictionary objectForKey:kNavBarTitleShadowOpacity]; 
    UIColor *navBarTitleColor = [UIColor colorWithHexString: [self.personalityDictionary objectForKey:kNavBarTitleColor] alpha:1.0f]; 
    UIColor *navBarTitleShadowColor = [UIColor colorWithHexString:[self.personalityDictionary objectForKey:kNavBarTitleShadowColor] alpha: [navBarTitleShadowOpacity floatValue]]; 

    return [NSDictionary dictionaryWithObjectsAndKeys: 
    navBarTitleColor, UITextAttributeTextColor, 
    navBarTitleShadowColor, UITextAttributeTextShadowColor, 
    [NSValue valueWithUIOffset:UIOffsetMake(0, 1)], UITextAttributeTextShadowOffset, 
    nil]; 
} 

所有的作品完美。在我的應用程序中，我需要將視圖控制器插入堆棧並彈出。

ChatsViewController* chatsViewController = [[ChatsViewController alloc] init]; 

NSMutableArray *mutableViewControllers = [self.navigationController.viewControllers mutableCopy]; 

[mutableViewControllers insertObject: chatsViewController atIndex: [mutableViewControllers count] - 1]; 

[self.navigationController setViewControllers: mutableViewControllers animated: NO]; 

[self.navigationController popToViewController: chatsViewController animated: YES]; 

此時，標題欄會丟失外觀設置並返回到默認白色。任何推入堆棧的新視圖控制器也會失去其外觀。

有什麼問題？

Answer 1

如果你在appDelegate類中定製這個，那麼這個問題將永遠不會發生。

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions: (NSDictionary *)launchOptions 
    { 
    // Code......... 

    [[UINavigationBar appearance] setTitleTextAttributes: [self navigationBarTitleTextAttributes]] 
    } 

-(NSDictionary *)navigationBarTitleTextAttributes 
{ 

// NSNumber *navBarTitleShadowOpacity = [self.personalityDictionary objectForKey:kNavBarTitleShadowOpacity]; 
UIColor *navBarTitleColor = [UIColor redColor];//: [self.personalityDictionary objectForKey:kNavBarTitleColor] alpha:1.0f]; 
UIColor *navBarTitleShadowColor = [UIColor greenColor];//colorWithHexString:[self.personalityDictionary objectForKey:kNavBarTitleShadowColor] alpha: [navBarTitleShadowOpacity floatValue]]; 

return [NSDictionary dictionaryWithObjectsAndKeys: 
     navBarTitleColor, UITextAttributeTextColor, 
     navBarTitleShadowColor, UITextAttributeTextShadowColor, 
     [NSValue valueWithUIOffset:UIOffsetMake(0, 1)], UITextAttributeTextShadowOffset, 
     nil]; 
    } 

希望它會幫助你。