给UILabel添加点击事件

允许UILabel 跟用户的交互事件

        _addressLabel.userInteractionEnabled = YES;

添加事件

        UITapGestureRecognizer * tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(chooseAddress)];
        [_addressLabel addGestureRecognizer:tapGesture];