Question

这是我更改应用标签栏和导航栏颜色的代码：

UIColor* color = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blue.jpeg"]];

//set colors
[[UINavigationBar appearance] setTintColor:color];
[[UITabBar appearance] setTintColor:color];

然而只有标签栏的色调变化;导航栏保持黑色。为什么setTintColor:适用于标签栏但不适用于导航栏？

编辑：有趣的是，当在真实设备（运行iOS 5.0.1的iPhone 4）上进行测试时，标签栏和导航栏的颜色都没有改变;都保持黑色。在模拟器上至少标签栏改变了...对这种行为的任何解释？谢谢！

编辑2：这是我applicationDidFinishLaunching:

中代码的一部分

UIColor* color = [UIColor colorWithPatternImage:[UIImage imageNamed:@"blue.jpeg"]];

//create navigation controllers
firstNavigationController = [[UINavigationController alloc] 
    initWithRootViewController:viewController1];
[[firstNavigationController navigationBar] setTintColor:color];
//[[firstNavigationController navigationBar] setBarStyle:UIBarStyleBlack];

secondNavigationController = [[UINavigationController alloc] 
    initWithRootViewController:viewController2];
[[secondNavigationController navigationBar] setTintColor:color];
//[[secondNavigationController navigationBar] setBarStyle:UIBarStyleBlack];

thirdNavigationController = [[UINavigationController alloc] 
    initWithRootViewController:viewController3];
[[thirdNavigationController navigationBar] setTintColor:color];
//[[thirdNavigationController navigationBar] setBarStyle:UIBarStyleBlack];

fourthNavigationController = [[UINavigationController alloc] 
    initWithRootViewController:viewController4];
[[fourthNavigationController navigationBar] setTintColor:color];
//[[fourthNavigationController navigationBar] setBarStyle:UIBarStyleBlack];

//create tab bar controller
self.tabBarController = [[UITabBarController new] autorelease];
self.tabBarController.delegate = self;

//set controllers
self.tabBarController.viewControllers = [NSArray 
    arrayWithObjects:firstNavigationController, secondNavigationController, 
    thirdNavigationController, fourthNavigationController, nil];

Answer 1

从“blue.jpeg”中查找RGB并将其设置为浅色...

self.navigationController.navigationBar.tintColor = [UIColor colorWithRed:213.0/255.0 green:166.0/255.0 blue:39.0/255.0 alpha:1];

或者当您将图像设置为背景颜色时，您可以使用以下代码...

self.navigationController.navigationBar.layer.contents = (id)[UIImage imageNamed:@"blue.jpeg"].CGImage;

Answer 2

从更多挖掘中，我了解到将tintColor属性设置为由图像制作的颜色被视为“黑客”。仅支持RGB颜色，并且期望该颜色适用于此属性。所以你有它。由于NDA我无法提供更多细节，但一旦iOS 6公开，我将尝试更新。

setTintColor：对UINavigationBar外观无效

2 个答案: