在故事板中按下按钮时发出信号Sigabrt

Question

嗨我在一页中按下按钮连接到另一个视图时出错

你能帮我吗？ 提前谢谢！

这是我的代码

-(void)buttonPressed:(UIButton *)button
{
NSLog(@"button %u -- frame: %@", button.tag, NSStringFromCGRect(button.frame));
[self performSegueWithIdentifier:@"WeekView" sender:self];

}

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString: @"WeekView"]){

    [segue.destinationViewController setTitle:@"WeekView"];
    }}

此行中的错误

with debugging = Signal Sigabrat start from here

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

我还在Segue中识别WeekView，并使用shipt + command + K来清理但仍然是错误

Answer 1

您必须先初始化destinationviewcontroller，然后才能更改属性：

- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if ([segue.identifier isEqualToString: @"WeekView"]){

SecondViewController*second=segue.destinationViewController;   //You´re missing this line.

second.title=@"WeekView";    // now you can do stuff on your destinationViewController



    }}

我希望它能解决它。