问题描述
在iPad的iOS7上，首先，我设置了一个模态视图控制器，大小为320 * 460，然后，在此模态视图控制器中，我展示了另一个导航视图控制器，其后是导航栏和工具的色调所显示的导航控制器的条变为灰色.我试图设置导航栏和工具栏的颜色，但这是行不通的.
On iOS7 of iPad, first, I setup an modal view controller, the size is 320 * 460, then, in this modal view controller, I presented another navigation view controller, after this, the tint color of navigation bar and tool bar of the presented navigation controller turns gray. I have tried to set tint color of navigation bar and tool bar, but it just doesn't work.
然后我尝试直接显示导航控制器，然后所有色调都可以在导航栏和工具栏上使用.
Then I tried to present the navigation controller directly, then all tint color works both on navigation bar and tool bar.
我尝试使用导航栏和工具栏的barTintColor属性，它可以正常工作.
I have tried with the barTintColor property of navigation bar and tool bar, it works.
我不知道会发生什么.
更新
首先，我定义一个视图控制器:modalViewController当前的模态视图控制器是这样的:
first, I define a view controller: modalViewControllerThe present the modal view controller like this:
if (DeviceIsPad()) // DeviceIsPad is a method defined somewhere to tell that the device is an iPad.
modaViewController.modalPresentationStyle = UIModalPresentationFormSheet;
//here self is a normal view controller
[self presentViewController:modalViewController animated:YES completion:NULL];
第二，定义一个导航视图控制器:navigationController像这样显示导航控制器:
Second, define a navigation view controller: navigationControllerPresent the navigation controller like this:
if (DeviceIsPad())
navigationController.modalPresentationStyle = UIModalPresentationCurrentContext;
// here self means the modalViewController mentioned above
[self presentViewController:navigationController animated:YES completion:nil];
我在navigationController的'viewDidLoad'方法中设置了导航栏和工具栏栏项.
I setup the navigation bar and toolbar bar items in 'viewDidLoad' method of navigationController.
默认情况下，当导航视图控制器出现时，所有工具栏按钮项(这些项仅以诸如Cancel，OK之类的基本标题构建)变成灰色.
By default, when the navigation view controller comes out, all toolbar button items(The items are built with just basic title like Cancel, OK) turns to be gray.
同时，我尝试将tintColor设置为tool bar和navigation bar.实例方法和外观方法(如[[UIToolBar appearance] setTintColor:[UIColor blueColor]])都被使用.但这仍然行不通.
At the same time, I have tried to set tintColor of tool bar and navigation bar. Both instance method and appearance method(like [[UIToolBar appearance] setTintColor:[UIColor blueColor]]) are used. But it still doesn't work.
然后我尝试直接从普通视图控制器中以UIModalPresentationFormSheet样式呈现上述的navigationViewController，然后导航栏和工具栏的所有tintColor都变为蓝色(系统蓝色).
And then I tried to present the navigationViewController mentioned above with UIModalPresentationFormSheet style directly from a normal view controller, then all tintColor for navigation bar and tool bar turns to be the blue color(the system blue color).
推荐答案
之所以会发生这种情况，是因为Apple假定我们不会提供超过1个视图控制器，并且将背景和所有长条按钮项(不确定原因)变暗为默认行为将焦点放在最前面的视图上.
This happens because Apple assumes that we won't present more than 1 view controller and dims the background and ALL bar button items (not sure why) as default behavior to put focus on the frontmost view.
要解决此问题，只需在DidFinishLaunchingWithOptions中在应用程序窗口上将tintAdjustmentMode强制为Normal.
To fix this, you just need to force the tintAdjustmentMode to Normal on the app's window in DidFinishLaunchingWithOptions.
self.window.tintAdjustmentMode = UIViewTintAdjustmentModeNormal;
这篇关于为什么tintColor在iOS7的导航栏或工具栏上不起作用的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！