ios - 选择照片后 UIPickerController 内存泄漏

Question

每当我在我的图像选择器 Controller 中选择一张照片时，我就会发生内存泄漏。我已经尝试自己研究为什么会发生这种情况，但我没有发现任何与我的情况相近的东西。我从中学到的各种教程在使用图像选择器 Controller 时也存在内存泄漏。我所做的只是选择一张照片，然后图像选择器 Controller 关闭。我已经尝试了很多天的解决方案，但没有运气，我倾向于在寻求帮助之前尝试找到解决方案，非常感谢任何帮助，这是我的代码。

@property (nonatomic, strong) UIImagePickerController *imagePicker;
@property (nonatomic, strong) UIImage *image;

- (void)viewWillAppear:(BOOL)animated {
[super viewWillAppear:animated];


[self.tableView reloadData];
if (self.image == nil && [self.videoFilePath length] == 0) {
    self.imagePicker = [[UIImagePickerController alloc] init];
    self.imagePicker.delegate = self;
    self.imagePicker.allowsEditing = NO;
    self.imagePicker.videoMaximumDuration = 10;

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera]) {
        self.imagePicker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else {
        self.imagePicker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }
    self.imagePicker.mediaTypes = [UIImagePickerController availableMediaTypesForSourceType:self.imagePicker.sourceType];

    [self presentViewController:self.imagePicker animated:YES completion:nil];
}

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {
NSString *mediaType = [info objectForKey:UIImagePickerControllerMediaType];

if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
    self.image = [info objectForKey:UIImagePickerControllerOriginalImage];



   UIImage *newImage = [self resizeImage:self.image toWidth:200 andHeight:200];

    self.image = newImage;


    if (self.imagePicker.sourceType == UIImagePickerControllerSourceTypeCamera) {

        UIImageWriteToSavedPhotosAlbum(self.image, nil, nil, nil);
    }
}
else if ([mediaType isEqualToString:(NSString *)kUTTypeMovie]) {
    // A video was taken/selected!

    NSURL *videoUrl = info[UIImagePickerControllerMediaURL];
    self.movieUrl = videoUrl;

    self.videoFilePath = videoUrl.absoluteString;

    if (self.imagePicker.sourceType == UIImagePickerControllerSourceTypeCamera) {
        // Save the video!

        if (UIVideoAtPathIsCompatibleWithSavedPhotosAlbum(self.videoFilePath)) {
            UISaveVideoAtPathToSavedPhotosAlbum(self.videoFilePath, nil, nil, nil);
        }
    }
}

[self dismissViewControllerAnimated:YES completion:nil];

当我使用我得到的工具时，负责的实例在 Core Foundation 中。 CF字符串。我不太熟悉在 Objective-C 中调试像这样的内存泄漏。我会很感激这里的手!谢谢。

Answer 1

泄漏来自 Apple 的代码。您做错的唯一一件事是保留 UIImagePickerController 作为实例属性。别那样做;每次呈现 UIImagePickerController 时将其创建为临时局部变量。除此之外，您无能为力。