popViewControllerAnimated 和 selectedIndex 的 UITabBarController 旋转问题（iPhone SDK）

发布于 2024-08-30 00:55:06 字数 2643 浏览 3 评论 0原文

这是一个非常重要的自动旋转问题并且易于重现。

我的应用程序有一个 UITabBarController。每个选项卡都是一个 UINavigationController。自动旋转是通过正常调用 shouldAutorotateToInterfaceOrientation 和 didRotateFromInterfaceOrientation 来处理的。

界面正常旋转，直到我调用 UIViewController.popViewControllerAnimated 并更改 UITabBarController.selectedIndex。

重现步骤：

创建一个演示选项卡栏应用程序。

将以下代码添加到 App Delegate .h 文件中：

#import 

@interface TestRotationAppDelegate : NSObject {
    UIWindow *窗口;
    UITabBarController *tabBarController;
}

@property（非原子，保留）IBOutlet UIWindow *window;
@property（非原子，保留）IBOutlet UITabBarController *tabBarController;

@结束

// 重新定义缓存轮换消息的接口
@interface UITabBarController (TestRotation1AppDelegate)

@结尾

将以下代码添加到 App Delegate .m 文件中：

#import "TestRotationAppDelegate.h"

@implementation TestRotationAppDelegate
@合成窗口；
@synthesize tabBarController;

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [窗口addSubview:tabBarController.view];
    [窗口 makeKeyAndVisible];
    返回是；
}

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    返回是；
}

-(void)dealloc {
    [tabBarController 发布]；
    [窗口释放]；
    [超级释放]；
}

@结束

@implementation UITabBarController (TestRotation1AppDelegate)

-(void)viewDidLoad {
    [超级viewDidLoad];
    // 添加第三个选项卡并推送视图 
    UIViewController *view1 = [[[UIViewController alloc] init] autorelease];
    view1.title = @"第三个";
    UINavigationController *nav = [[[UINavigationController alloc] initWithRootViewController:view1] autorelease];
    NSMutableArray *array = [[NSMutableArray alloc] init];
    [数组 addObjectsFromArray:self.viewControllers];
    [数组addObject:nav];
    self.viewControllers = 数组；
    // 将 view2 推入第三个选项卡
    UIViewController *view2 = [[[UIViewController alloc] init] autorelease];
    [nav PushViewController：view2动画：是]；
    // 创建一个按钮来弹出view2
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    按钮.frame = CGRectMake(50, 50, 220, 38);
    [button setTitle:@"弹出此视图" forState:UIControlStateNormal];
    [按钮 addTarget:self 操作:@selector(doAction) forControlEvents:UIControlEventTouchUpInside];
    [view2.view addSubview:按钮];
}

-(无效) doAction {
    // 旋转问题从这里开始
    // 去掉一行代码，问题就不会出现。
    [self.selectedViewController popViewControllerAnimated:YES];
    self.selectedIndex = 0;
}

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    返回是；
}

@结尾

界面会正常自动旋转，直到您点击选项卡 #3 上的按钮。

我们将非常感谢您的帮助！

原文

This is a very important auto rotate issue and easy to reproduce.

My application has a UITabBarController. Each tab is a UINavigationController. Auto rotation is handled with normal calls to shouldAutorotateToInterfaceOrientation and didRotateFromInterfaceOrientation.

The interface rotates normally until I call UIViewController.popViewControllerAnimated and change UITabBarController.selectedIndex.

Steps to reproduce:

Create a demo Tab Bar Application.

Add the following code to the App Delegate .h file:

#import <UIKit/UIKit.h>

@interface TestRotationAppDelegate : NSObject  {
    UIWindow *window;
    UITabBarController *tabBarController;
}

@property (nonatomic, retain) IBOutlet UIWindow *window;
@property (nonatomic, retain) IBOutlet UITabBarController *tabBarController;

@end

// Redefine the interface to cach rotation messages
@interface UITabBarController (TestRotation1AppDelegate)

@end

Add the following code to the App Delegate .m file:

#import "TestRotationAppDelegate.h"

@implementation TestRotationAppDelegate
@synthesize window;
@synthesize tabBarController;

-(BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {
    [window addSubview:tabBarController.view];
    [window makeKeyAndVisible];
    return YES;
}

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

-(void)dealloc {
    [tabBarController release];
    [window release];
    [super dealloc];
}

@end

@implementation UITabBarController (TestRotation1AppDelegate)

-(void)viewDidLoad {
    [super viewDidLoad];
    // Add a third tab and push a view 
    UIViewController *view1 = [[[UIViewController alloc] init] autorelease];
    view1.title = @"Third";
    UINavigationController *nav = [[[UINavigationController alloc] initWithRootViewController:view1] autorelease];
    NSMutableArray *array = [[NSMutableArray alloc] init];
    [array addObjectsFromArray:self.viewControllers];
    [array addObject:nav];
    self.viewControllers = array;
    // Push view2 inside the third tab
    UIViewController *view2 = [[[UIViewController alloc] init] autorelease];
    [nav pushViewController:view2 animated:YES];
    // Create a button to pop view2
    UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
    button.frame = CGRectMake(50, 50, 220, 38);
    [button setTitle:@"Pop this view" forState:UIControlStateNormal];
    [button addTarget:self action:@selector(doAction) forControlEvents:UIControlEventTouchUpInside];
    [view2.view addSubview:button];
}

-(void) doAction {
    // ROTATION PROBLEM BEGINS HERE
    // Remove one line of code and the problem doesn't occur.
    [self.selectedViewController popViewControllerAnimated:YES];
    self.selectedIndex = 0;
}

-(BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    return YES;
}

@end

The interface auto rotates normally until you tap the button on tab #3.

Your help will be geatly appreciated!

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