ios - 标签栏图标像素化

Question

使用这段代码

UITabBarController *tabBarController = (UITabBarController *)self.window.rootViewController;
    UITabBar *tabBar = tabBarController.tabBar;
    UITabBarItem *tabBarItem1 = [tabBar.items objectAtIndex:0];
    UITabBarItem *tabBarItem2 = [tabBar.items objectAtIndex:1];
    UITabBarItem *tabBarItem3 = [tabBar.items objectAtIndex:2];
    UITabBarItem *tabBarItem4 = [tabBar.items objectAtIndex:3];

    tabBarItem1.title = @"Home";
    tabBarItem2.title = @"Maps";
    tabBarItem3.title = @"My Plan";
    tabBarItem4.title = @"Settings";

    [tabBarItem1 setFinishedSelectedImage:[UIImage imageNamed:@"home_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"home.png"]];
    [tabBarItem2 setFinishedSelectedImage:[UIImage imageNamed:@"maps_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"maps.png"]];
    [tabBarItem3 setFinishedSelectedImage:[UIImage imageNamed:@"myplan_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"myplan.png"]];
    [tabBarItem4 setFinishedSelectedImage:[UIImage imageNamed:@"settings_selected.png"] withFinishedUnselectedImage:[UIImage imageNamed:@"settings.png"]];

工作正常..然而，当我使用此图像时，它在真实的 iphone 测试中看起来像素化..使用更大(宽度和高度)的图像将不合适，因为只能看到它的一部分。有没有一种方法可以将这些较大的图像拉伸(stretch)到特定的宽度和高度，以便看到它的整个部分？

Answer 1

遵循 iOS Human Interface Guidelines 中列出的尺寸.此外，不要指定 .png，因为您希望能够考虑非视网膜和视网膜图像(w/@2x)。