Question

-(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    UITouch *aTouch = [touches anyObject];

    NSLog(@"touch recognised");

    CGPoint location = [aTouch locationInView:_mainView];

    __block NSString *option = [[NSString alloc] init];
    __block NSString *type = [[NSString alloc] init];

    for (Selectors *tempView in _mainView.subviews) {
        if (CGRectContainsPoint(tempView.frame, location)) {
            NSLog(@"%@ : %@", tempView.option, tempView.type);

            option = tempView.option;
            type = tempView.type;

            break;
        }
    }


    [self moveToNextWeldCustomViewWithOption:option andType:type];


}

在我之前的UIVIewController中 - 然后我们在这里展示下一个UIViewController

-(void)moveToNextWeldCustomViewWithOption:(NSString *)option andType:(NSString *)type {

    WeldDesignViewController *lobby = [self.storyboard instantiateViewControllerWithIdentifier:@"WeldDesignViewController"];

    lobby.option = option;
    lobby.type = type;

    [self presentViewController:lobby animated:NO completion:nil];

}

在下一个UIViewController中，我没有做任何事情，直到viewDidAppear方法 - 但是，触摸开始仍然在下一个viewcontroller中被识别。

Answer 1

我认为问题在于您正在呼叫的VC＆＃34; lobby＆＃34;您出示后正在取消分配。这在响应者链中不考虑它。将该引用移动为呈现视图控制器的属性：

@property (nonatomic, strong) WeldDesignViewController* lobby;
// ...
-(void)moveToNextWeldCustomViewWithOption:(NSString *)option andType:(NSString *)type {

   self.lobby = [self.storyboard instantiateViewControllerWithIdentifier:@"WeldDesignViewController"];

    lobby.option = option;
    lobby.type = type;

    [self presentViewController:self.lobby animated:NO completion:nil];

}

您可能还需要在显示的VC中实现touchesBagan，因为它可能跟随前一个控制器的响应者链。

TouchesBegan在下一个视图控制器中识别

1 个答案: