如何设置选项卡栏项1在iPhone中默认选择? [英] How to set the Tab bar item 1 to be selected by default in iphone?

问题描述

我是iPhone开发的新手.我正在创建一个基于视图的应用程序.我在视图中添加了一个标签栏(而不是标签栏控制器).通过将选项卡栏项目的标签标签设置为1、2，我已在选项卡栏项目单击事件上加载了每个选项卡栏的视图.

I am new to iPhone development. I am creating a view based application. I have added a tab bar in my view (and not a tab bar controller). By setting the tag vale of the tab bar item to 1, 2, I have loaded the view for each tab bar on tabbar item click event.

我希望默认情况下选择选项卡栏1.我该怎么办?

I want the tab bar 1 to be selected by default. What should I do for that?

这是我的代码:

- (void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item {
    NSLog(@"didSelectItem: %d", item.tag);
    [self activateTab:item.tag];
}

- (void)activateTab:(int)index {
    switch (index) {
        case 1:

                self.tab1ViewController =[[tab1 alloc] initWithNibName:@"tab1" bundle:nil];

            [self.view insertSubview:tab1ViewController.view belowSubview:tabbar1];
            if (currentViewController != nil)
                [currentViewController.view removeFromSuperview];
            currentViewController = tab1ViewController; 
            break;
        case 2:

                self.tab2ViewController =[[tab2 alloc] initWithNibName:@"tab2" bundle:nil];
           [self.view insertSubview:tab2ViewController.view belowSubview:tabbar1];
           if (currentViewController != nil)
                [currentViewController.view removeFromSuperview];
            currentViewController = tab2ViewController;         
            break;
        default:
            break;
    }
}

我在界面构建器中添加了选项卡栏.我可以在界面构建器中做任何事情吗?

I added the the tab bar in interface builder.Can i do any thing in interface builder?

推荐答案

[tabBar setSelectedItem:[tabBar.items objectAtIndex:item.tag]];

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