ios – 相机覆盖视图中的自动布局 – 不能垂直居中按钮

2023年11月4日 278次阅读

我正在尝试为相机添加叠加层.为此,我创建了以下事件方法：

- (IBAction)takePhoto:(id)sender {
UIImagePickerController *imagePicker = [[UIImagePickerController alloc] init];

if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]){
    [imagePicker setSourceType:UIImagePickerControllerSourceTypeCamera];
    imagePicker.showsCameraControls = NO;
    imagePicker.navigationBarHidden = YES;
    imagePicker.toolbarHidden = YES;
    imagePicker.wantsFullScreenLayout = YES;

    // Overlay
    // Insert the overlay

    self.overlay = [[OverlayViewController alloc] initWithNibName:@"OverlayView" bundle:nil];
    //[self.overlay.view setTranslatesAutoresizingMaskIntoConstraints:NO];
    self.overlay.pickerReference = imagePicker;
    imagePicker.cameraOverlayView = self.overlay.view;
    imagePicker.delegate = self.overlay;

    [self presentViewController:imagePicker animated:NO completion:nil];
} else{
    [imagePicker setSourceType:UIImagePickerControllerSourceTypePhotoLibrary];
    [imagePicker setDelegate:self];
    [self presentViewController:imagePicker animated:YES completion:nil];
}
}

按钮在这样的视图中居中.

但是在使用时,它在iPhone 4上显示如下.它不是垂直居中的.如果我尝试将按钮Slikaj固定在底部,则不可见,因为iPhone 4的屏幕尺寸小于iPhone 5.选中使用自动布局复选框(打开).我究竟做错了什么？

最佳答案 您的叠加视图由于某种原因导致其他帧尺寸.

您可以通过将imagePicker框架尺寸指定给叠加视图来修复它.

self.overlay = [[OverlayViewController alloc] initWithNibName:@"OverlayView" bundle:nil];

self.overlay.pickerReference = imagePicker;
self.overlay.frame = imagePicker.cameraOverlayView.frame;
imagePicker.cameraOverlayView = self.overlay.view;
imagePicker.delegate = self.overlay;
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