大佬教程收集整理的这篇文章主要介绍了TabBarItem图标不会立即出现在ios 8中，大佬教程大佬觉得挺不错的，现在分享给大家，也给大家做个参考。
有一个基本的viewController与一些按钮.当其中一个按钮被触摸时,会出现一个带有三个标签的tabBarController.在iOS 8中,tabBarItems的图标最初不会出现.如果我更改了视图控制器,则会出现上一个和当前视图控制器的两个图标.如果我选择第三个选项卡,然后出现tabBarItems的所有图标.这是我的问题的屏幕截图：
TabBarController的第一个外观：
如果我改变标签：
这是我用来将tabBarItems的图标(所有图标都是30×30)设置为TabBarController的第一个viewController的viewDidLoad方法的代码：
[[[self.tabBarController.viewControllers objectATindex:0] tabBarItem] setFinishedSELEctedImage:[UIImage imagenamed:@"1d1.png"] withFinishedUnSELEctedImage:[UIImage imagenamed:@"1b1.png"]]; [[[self.tabBarController.viewControllers objectATindex:1] tabBarItem] setFinishedSELEctedImage:[UIImage imagenamed:@"2d1.png"] withFinishedUnSELEctedImage:[UIImage imagenamed:@"2b1.png"]]; [[[self.tabBarController.viewControllers objectATindex:2] tabBarItem] setFinishedSELEctedImage:[UIImage imagenamed:@"3d1.png"] withFinishedUnSELEctedImage:[UIImage imagenamed:@"3b1.png"]];
以下是适用于iOS 7的屏幕截图：
谁能帮我这个？？
if ([[[UIDevice currentDevice] systemVersion] floatValue] >= 7.0) { UITabBarItem *tabBarItem = [self.tabBarController.tabBar.items objectATindex:0]; UIImage *unSELEctedImage = [UIImage imagenamed:@"1b1.png"]; UIImage *SELEctedImage = [UIImage imagenamed:@"1d1.png"]; [tabBarItem setImage: [unSELEctedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]]; [tabBarItem setSELEctedImage:[SELEctedImage imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]]; UITabBarItem *tabBarItem1 = [self.tabBarController.tabBar.items objectATindex:1]; UIImage *unSELEctedImage1 = [UIImage imagenamed:@"2b1.png"]; UIImage *SELEctedImage1 = [UIImage imagenamed:@"2d1.png"]; [tabBarItem1 setImage: [unSELEctedImage1 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]]; [tabBarItem1 setSELEctedImage: [SELEctedImage1 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]]; UITabBarItem *tabBarItem2 = [self.tabBarController.tabBar.items objectATindex:2]; UIImage *unSELEctedImage2 = [UIImage imagenamed:@"3b1.png"]; UIImage *SELEctedImage2 = [UIImage imagenamed:@"3d1.png"]; [tabBarItem2 setImage: [unSELEctedImage2 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]]; [tabBarItem2 setSELEctedImage:[SELEctedImage2 imageWithRenderingMode:UIImageRenderingModeAlwaysOriginal]]; [tabBarItem settitle:@"Φωτογραφίες"]; [tabBarItem2 settitle:@"360° Φωτογραφία"]; [tabBarItem1 settitle:@"Βίντεο"]; } else { [[[self.tabBarController.viewControllers objectATindex:0] tabBarItem] setFinishedSELEctedImage:[UIImage imagenamed:@"1d1.png"] withFinishedUnSELEctedImage:[UIImage imagenamed:@"1b1.png"]]; [[[self.tabBarController.viewControllers objectATindex:1] tabBarItem] setFinishedSELEctedImage:[UIImage imagenamed:@"2d1.png"] withFinishedUnSELEctedImage:[UIImage imagenamed:@"2b1.png"]]; [[[self.tabBarController.viewControllers objectATindex:2] tabBarItem] setFinishedSELEctedImage:[UIImage imagenamed:@"3d1.png"] withFinishedUnSELEctedImage:[UIImage imagenamed:@"3b1.png"]]; [[[self.tabBarController.viewControllers objectATindex:0] tabBarItem] settitle:@"Φωτογραφίες"]; [[[self.tabBarController.viewControllers objectATindex:2] tabBarItem] settitle:@"360° Φωτογραφία"]; [[[self.tabBarController.viewControllers objectATindex:1] tabBarItem] settitle:@"Βίντεο"]; }
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