Question

嗨我想实现这个动画效果（使用故事板），当用户点击标签栏（比如第二个标签栏项目）时，它会像模态视图一样显示相应的视图（向上显示到屏幕）

我当前的方法是委托标签栏控制器到标签栏并重写

-(void)tabBar:(UITabBar *)tabBar didSelectItem:(UITabBarItem *)item{
    NSLog(@"rawr");
    NSLog(@"inside tab bar did select, index is %d", self.selectedIndex);

    if (item == [self.tabBar.items objectAtIndex:1]) {
        //item.title = @"modal view";
        NSLog(@"going to promote as modal view");
        CBTab2ViewController* modalViewController = [[CBTab2ViewController alloc] init];
        [self presentViewController:modalViewController animated:YES completion:nil];
    }
}

问题是，显示的视图是黑屏，任何想法如何正确实现？

我的源代码可以在下面找到一个链接： https://www.dropbox.com/s/6rd6ek59xf0yiq4/testtabbar.zip

Answer 1

更改行：

CBTab2ViewController* modalViewController = [[CBTab2ViewController alloc] init];
[self presentViewController:modalViewController animated:YES completion:nil];

对于这个（如果你的故事板名称是＆＃34; MainStoryBoard＆＃34;）：

 UIStoryboard *mainStoryboard = [UIStoryboard storyboardWithName:@"MainStoryboard"
                                                         bundle: nil];

CBTab2ViewController * modalViewController = (MyViewController*)[mainStoryboard 
                        instantiateViewControllerWithIdentifier: @"CBTab2ViewController"];

[self presentViewController:modalViewController animated:YES completion:nil];

ios标签栏单击以显示模态视图获得黑屏

1 个答案: