objective-c - iOS 7，未选择的色调？

Question

我正在升级我的应用程序以满足 iOS 7 准则。我的主标签栏 Controller 具有蓝色背景，默认的灰色“未选择”色调使图标几乎不可见。如何更改这些图标的色调？我希望它们是黑色或与蓝色背景形成鲜明对比的颜色。

我已经使用 window.TintColor = White 配置了一个应用程序范围的色调，但这只会改变选定的颜色。 (与 TabBar.TintColor 相同)

Answer 1

我还没有测试过，但不幸的是，这个答案看起来是唯一的解决方案
https://stackoverflow.com/a/18433996/1732987

更新:为后代复制代码。

// set color of selected icons and text to red
self.tabBar.tintColor = [UIColor redColor];
[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys: [UIColor redColor], UITextAttributeTextColor, nil] forState:UIControlStateSelected];


// set color of unselected text to green
[[UITabBarItem appearance] setTitleTextAttributes:[NSDictionary dictionaryWithObjectsAndKeys:[UIColor greenColor], UITextAttributeTextColor, nil]
                                     forState:UIControlStateNormal];

// set selected and unselected icons
UITabBarItem *item0 = [self.tabBar.items objectAtIndex:0];

// this way, the icon gets rendered as it is (thus, it needs to be green in this example)
item0.image = [[UIImage imageNamed:@"unselected-icon.png"] imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal];

// this icon is used for selected tab and it will get tinted as defined in self.tabBar.tintColor
item0.selectedImage = [UIImage imageNamed:@"selected-icon.png"];