iOS oc 如何实现使用UIbutton跳转页面？

Question

• (void)prepareForSegue:(UIStoryboardSegue )segue sender:(id)sender {
  CropImageViewController *destination =(CropImageViewController)segue.sourceViewController;

  destination.image = _imageView.image;
  }

• (IBAction)ShowCropViewController:(id)sender {
  [self performSegueWithIdentifier: _identifier sender: self];

}

我现在 第一个是把这个view controller的照片 转去了 第二个view controller 可是只要这段代码在我的按钮就不可以跳转页面

Answer 1

• (IBAction)button:(UIButton *)sender {

  sender.selected =!sender.selected;

  NSLog(@"%d",sender.selected);
  if (sender.selected) {
  //通过segue连线器的标识执行逻辑跳转
  [self performSegueWithIdentifier:@"LoginSucessSegue" sender:self];
  }else{
  [self performSegueWithIdentifier:@"LoginFailSegue" sender:self];
  }

}

-(void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender{
if ([segue.identifier isEqual:@"LoginSucessSegue"]) {
successViewController *sucVc= segue.destinationViewController;
sucVc.pramStr =@"传值成功";
}else{
backViewController *bacVc = segue.destinationViewController;
bacVc.PramStr = @"传值失败";
}
}