我正在构建一个通用的 iOS 应用程序，iPad 版本使用 SplitViewController。在弹出视图中，我有一个带有两个按钮的 UITabBarController。当它在 iPhone 上运行时，TabBar 按钮正确拉伸以填充视图的整个宽度......
...但是在 iPad 上，在弹出视图中，按钮不会拉伸以填充整个宽度...
我正在以编程方式创建 UITabBarController...
InspectionTabBarViewController *inspectionTabBarVC;
InspectionListViewController *inspectionListVC;
self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
if ([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone) {
inspectionListVC = [[InspectionListViewController alloc] initWithSunday:NO];
inspectionListVC.managedObjectContext = self.managedObjectContext;
UINavigationController *calendarNavVC = [[UINavigationController alloc] initWithRootViewController:inspectionListVC];
calendarNavVC.title = @"Calendar";
InspectionMapViewController *mapViewVC = [[InspectionMapViewController alloc] initWithNibName:@"InspectionMapView_iPhone" bundle:nil];
UINavigationController *mapdNavVC = [[UINavigationController alloc] initWithRootViewController:mapViewVC];
mapdNavVC.title = @"Map";
inspectionTabBarVC = [[InspectionTabBarViewController alloc] init];
[inspectionTabBarVC addChildViewController:calendarNavVC];
[inspectionTabBarVC addChildViewController:mapdNavVC];
self.window.rootViewController = inspectionTabBarVC;
}
else
{
inspectionListVC = [[InspectionListViewController alloc] initWithSunday:NO];
UINavigationController *calendarNavVC = [[UINavigationController alloc] initWithRootViewController:inspectionListVC];
calendarNavVC.title = @"Calendar";
InspectionMapViewController *mapViewVC = [[InspectionMapViewController alloc] initWithNibName:@"InspectionMapView_iPad" bundle:nil];
UINavigationController *mapdNavVC = [[UINavigationController alloc] initWithRootViewController:mapViewVC];
mapdNavVC.title = @"Map";
inspectionTabBarVC = [[InspectionTabBarViewController alloc] init];
[inspectionTabBarVC addChildViewController:calendarNavVC];
[inspectionTabBarVC addChildViewController:mapdNavVC];
DetailViewController *detailViewController = [[DetailViewController alloc] initWithNibName:@"DetailViewController_iPad" bundle:nil];
UINavigationController *detailNavigationController = [[UINavigationController alloc] initWithRootViewController:detailViewController];
self.splitViewController = [[UISplitViewController alloc] init];
self.splitViewController.delegate = detailViewController;
self.splitViewController.viewControllers = [NSArray arrayWithObjects:inspectionTabBarVC, detailNavigationController, nil];
self.window.rootViewController = self.splitViewController;
inspectionListVC.detailViewController = detailViewController;
inspectionListVC.managedObjectContext = self.managedObjectContext;
detailViewController.detailViewControllerDelegate = inspectionListVC;
}
[self.window makeKeyAndVisible];
我还尝试使用以下语句在 InspectionTabBarViewController 的 loadView 方法内设置 autoResizeMask...
self.tabBar.autoresizingMask = UIViewAutoresizingFlexibleLeftMargin | UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleBottomMargin | UIViewAutoresizingFlexibleWidth;
...但这也不起作用。如何让 UITabBar 按钮填充视图的整个宽度？
预先非常感谢您的帮助！
Change UITabBar财产itemPositioning to UITabBarItemPositioningFill:
self.tabBar.itemPositioning = UITabBarItemPositioningFill;
斯威夫特版本：
tabBar.itemPositioning = .fill
UITabBar item定位参考 https://developer.apple.com/library/ios/documentation/UIKit/Reference/UITabBar_Class/index.html#//apple_ref/occ/instp/UITabBar/itemPositioning
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