IOS Segue 在自定义选项卡栏中不起作用

Question

我使用 segue 制作我的自定义标签栏，它运行成功，现在我尝试在标签栏 View Controller 上的两个 View Controller 之间传递数据

我的标签栏 Controller 代码

- (void) perform {

    ViewController *ctbcv = (ViewController *)self.sourceViewController;
    UIViewController *dst = (UIViewController *) self.destinationViewController;
    for(UIView *view in ctbcv.placeholder.subviews)
    {
        [view removeFromSuperview];
    }
    ctbcv.currentViewController = dst;
    [ctbcv.placeholder addSubview:dst.view];
}

和segue条件

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if([segue.identifier isEqualToString:@"HomeSegue"]
   || [segue.identifier isEqualToString:@"DeveloperSegue"]
   || [segue.identifier isEqualToString:@"DesignerSegue"]|| [segue.identifier isEqualToString:@"btn4"]){

NSLog(@"%lu",(unsigned long)[self.buttons.subviews count]);

for (int i=0; i<[self.buttons.subviews count];i++) {
        UIButton *button = (UIButton *)[self.buttons.subviews objectAtIndex:i];
        [button setSelected:NO];
    }

    UIButton *button = (UIButton *)sender;
    NSLog(@"%ld", (long)button.tag);
     btnclicked = button.tag;
    [button setSelected:YES];
}
}

此代码运行成功，现在我在第一个 View Controller 上创建按钮并将 segue 提供给新的 View Controller ，单击按钮时它会崩溃。

- (void)viewDidLoad {
[super viewDidLoad];

[btnnext addTarget:self action:@selector(buttonClicked:) forControlEvents:UIControlEventTouchUpInside];

}

-(void) buttonClicked:(UIButton*)sender
{

NSLog(@"you clicked on button %ld", (long)sender.tag);

[self performSegueWithIdentifier:@"MySegue" sender:sender];

 }

 - (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
 {
if ([[segue identifier] isEqualToString:@"MySegue"]) {
          navVC *vc = [segue destinationViewController];

  }
 }

在这段代码之后它崩溃了，Xcode 显示“THREAD 1: EXC_BAD_ACCESS(code=2, address = 0xc)”任何解决方案？

我用 this reference用于制作自定义标签栏

我制作了在这个标签栏中打开新 View Controller 的按钮。

谢谢

Answer 1

只需检查一下您是否已将代码放在要使用的主 Controller 中，而不是放在标签栏 Controller 的标签中。