添加到 UIImageView 时 UIButton 没有响应

本文介绍了添加到 UIImageView 时 UIButton 没有响应的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！

问题描述

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我正在尝试向具有透明背景的 UIImageView 添加一个按钮 - 该按钮显示正常但没有响应.(不调用takePictureClicked)

I'm trying to add a button to a UIImageView with a transparent background - the button is shown ok but is not responding. (takePictureClicked is not called)

我的代码:

cameraController = [[UIImagePickerController alloc] init];
cameraController.sourceType = UIImagePickerControllerSourceTypeCamera;
cameraController.delegate = self;
cameraController.allowsEditing=YES;
cameraController.showsCameraControls = NO;
cameraController.navigationBarHidden = YES;
cameraController.toolbarHidden = YES;
// overlay on top of camera lens view
UIImageView *cameraOverlayView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"camera_overlay.png"]];
cameraOverlayView.alpha = 0.0f;
//Take picture button
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
UIImage *btnImage = [UIImage imageNamed:@"714-camera.png"];
[button setImage:btnImage forState:UIControlStateNormal];
[button addTarget:self action:@selector(takePictureClicked) forControlEvents:UIControlEventTouchUpInside];
button.frame = CGRectMake(cameraOverlayView.center.x-16,cameraOverlayView.frame.size.height,32,32);
[cameraOverlayView addSubview:button];
[cameraOverlayView setUserInteractionEnabled:YES];
[cameraOverlayView bringSubviewToFront:button];
cameraController.cameraOverlayView = cameraOverlayView;

推荐答案

您是否尝试将 userInteractionEnabled 设置为 UIImageView?

Have you tried setting userInteractionEnabled to the UIImageView?

尝试:

cameraOverlayView.userInteractionEnabled = YES;

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