菜单 - iOS开发:如何添加手势只有从最左边滑有效?-PHP Chinese Network Q&A

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菜单 - iOS开发:如何添加手势只有从最左边滑有效?

PHP中文网 2017-04-17 17:37:41

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公司APP类似Uber,从最左侧滑动会出现菜单,但需要用到地图,添加全屏的tap手势会产生冲突,求大神支招,如何结局啊?急急急

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大家讲道理2017-04-17 17:39:41 2 floor

你是想要只能从屏幕的左边边缘处向右滑动才有效么？如果是的话，加一个边缘手势就可以解决！如下：

- (void)viewDidLoad {
    [super viewDidLoad];
    
    UIScreenEdgePanGestureRecognizer* screenEdgePan = [[UIScreenEdgePanGestureRecognizer alloc]initWithTarget:self action:@selector(action:)];
    screenEdgePan.edges = UIRectEdgeLeft;
    [self.view addGestureRecognizer:screenEdgePan];
 
}
    
-(void)action:(UIScreenEdgePanGestureRecognizer*)sender{
    if (sender.edges == UIRectEdgeLeft) {
        NSLog(@"正在从左边滑动");
        switch (sender.state) {
            case UIGestureRecognizerStateBegan:
                NSLog(@"手势开始");
                break;
            case UIGestureRecognizerStateChanged:
                NSLog(@"手势进行中");
                break;
            case UIGestureRecognizerStateEnded:
                NSLog(@"手势结束");
                break;
                
            default:
                break;
        }
        
    }
}