ios - UIGestureRecognizer Delegate 方法永远不会被调用

Question

试图在 ScrollView 的 subview 中制作一些可拖动的图像。但什么也没有发生。有人知道为什么handlePan中的断点永远不会被命中吗？ :'(谢谢你能帮忙!

-(void) viewWillAppear:(BOOL)animated
{
    twView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"twitter"]];
    [self.springView addSubview:twView];
    [twView setFrame:CGRectMake(100, 100, 60, 60)];

    fbView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"facebook"]];
    [self.springView addSubview:fbView];
    [fbView setFrame:CGRectMake(200, 200, 60, 60)];

    g1 = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
    [twView addGestureRecognizer:g1];
    g1.delegate = self;

    g2 = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(handlePan:)];
    [fbView addGestureRecognizer:g2];
    g2.delegate = self;

}

-(void)handlePan:(UIPanGestureRecognizer *)gesture
{
    ... do amazing things
}

Answer 1

根据您在这里的情况，这可能是两件事之一。您的 ImageView 没有 userInteractionEnabled设置为是，或者在您的 ImageView 顶部有另一个 View 阻止手势。