iPhone UITabBar-如何切换标签视图？

Question

您能告诉我切换标签视图的工作方式吗？ 因为在我的“ sendPressed”和“ cancelPressed”方法中，我试图从第二个选项卡视图切换到第一个选项卡视图。 但是，到目前为止，我在“ [[[array objectAtIndex：2] setSelectedSegmentIndex：1]”行上遇到了错误。

#import "SecondViewController.h"

@implementation SecondViewController

- (IBAction) sendPressed:(UIButton *)sender
{
    array = [[self tabBarController] viewControllers];
    [[array objectAtIndex:2] setSelectedSegmentIndex:1];
    [[self tabBarController] setViewControllers:array];
}

- (IBAction) cancelPressed:(UIButton *)sender
{
    array = [[self tabBarController] viewControllers];
    [[array objectAtIndex:2] setSelectedSegmentIndex:1];
    [[self tabBarController] setViewControllers:array];

}

- (void) imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
    image = [info objectForKey:UIImagePickerControllerOriginalImage];
    imageView.image = image;
    [self dismissModalViewControllerAnimated:YES];
}

...
@end

Answer 1

将该行替换为：

self.tabBarController.selectedIndex = 1;

标签索引从0开始。因此索引0是第一个标签，索引1是第二个标签，依此类推。

Answer 2

尝试

self.tabBarController.selectedIndex = 0; //first tab

Answer 3

你为什么不使用

self.tabBarController.selectedIndex = 0;   // for first tab


// 1 for second tab
// 2 for third tab .....