Question

在我的应用程序中，我为每个图像动态创建了imageView，并将它们放在一个scrollview中。如何通过单击每个图像生成事件以执行导航操作？

Answer 1

快速且易于实施

UITapGestureRecognizer UIImageView使用addGestureRecognizer。

UITapGestureRecognizer *singleTap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageViewTapped:)];
singleTap.numberOfTapsRequired = 1;
singleTap.numberOfTouchesRequired = 1;
[theImageView addGestureRecognizer:singleTap];
[theImageView setUserInteractionEnabled:YES];

现在点击视图时会触发以下内容：

- (void)imageViewTapped:(UIGestureRecognizer *)gestureRecognizer {
    NSLog(@"%@", [gestureRecognizer view]);
}

替代解决方案

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
    if ([[touches anyObject] view] == theImageView)
    {
        // ImageView tapped.
    }
}

Answer 2

使用UIGestureRecognizer 。在您的情况下，只需在每个UITapGestureRecognizer上添加UIImageView即可。 请勿忘记在userInteractionEnabled上启用UIImageView ，以便考虑点按。

UITapGestureRecognizer* tapGR = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(imageViewAction:)];
[imageView addGestureRecognizer:tapGR];
imageView.userInteractionEnabled = YES;

-(void)imageViewAction:(UITapGestureRecognizer*)tapGR
{
    UIImageView* imageView = tapGR.view;
    // Do something with your imageView
}

阅读the Event Handling Guide for iOS (Apple Doc) ，了解有关Gesture识别器如何工作以及如何使用它们的详细信息，以及示例和内容。这本Apple指南非常值得阅读，包含非常有用的概念和解释。

如何通过单击图像进行导航？

2 个答案: