Question

我是IOS编程的初学者......我现在对这些方法并不熟悉。设置是：我有一个叫做的函数。在这个函数中，我想等待一次点击，然后生成一个新的ViewController。我只需要点击CGPoint，然后继续下一步。但我不知道是否有一些方法可以捕获touchesEnded。或者我想错误的方式。有人能提供给我一些吗？

如果我在触摸结束后立即创建新的viewController，那么在modelDetect（它是必需的）之后什么都不会发生。应用程序将在触摸之前结束。

所以我现在不知道。

非常感谢。

- (void)modelDetect
{
 //wait for touches....then
 [self addNewViewController]; 
}


- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event  
{
   NSLog(@"touch happens");
   UITouch *touch = [touches anyObject];
   Location = [touch locationInView:self.view];      
}

Answer 1

您可以尝试使用UITapGestureRecognizer它可以解决您的问题

UITapGestureRecognizer *rec = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(userTapped:)];
[self addGestureRecognizer:rec];


- (void)userTapped:(UITapGestureRecognizer *)recognizer
{
    if(recognizer.state == UIGestureRecognizerStateRecognized)
    {
        CGPoint point = [recognizer locationInView:recognizer.view]; 
        // point.x and point.y  touch coordinates
         NSLog("%lf %lf", point.x, point.y);

        // here you could call your method or add the new view controller which you want
         [self addNewViewController]; 
    }
}

要获得点touchesEnded，您应该使用CGPoint

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
    UITouch *aTouch = [touches anyObject];
    CGPoint point = [aTouch locationInView:self];
    // point.x and point.y touch coordinates
    NSLog("%lf %lf", point.x, point.y);
}

IOS，Xcode：捕获UITouch事件结束

1 个答案: