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私のアプリでは、カメラを使用して1つの画像を作成しようとしていますが、理由もなく常にクラッシュします。

私は長い間この問題に取り組んでいるので、不要に見えるコードを提供しています：ビューコントローラーで：

- (id) init
{
    if([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPhone)
    {
        self = [super initWithNibName:@"WCAddNewWatchViewController_iPhone" bundle:[NSBundle mainBundle]];
    }else
    {
        self = [super initWithNibName:@"WCAddNewWatchViewController_iPad" bundle:[NSBundle mainBundle]];
    }

    if(self)
    {

    }

    return self;
}
- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view from its nib.

    [[self navigationItem]setRightBarButtonItem:self.AddButton];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

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

    if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypeCamera])
    {
        picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    }
    else
    {
        picker.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
    }

    picker.mediaTypes = @[(NSString *) kUTTypeImage];
    picker.allowsEditing = NO;
    [picker setDelegate:self];

    [self presentViewController:picker animated:YES completion:nil];

}

#pragma mark UIImagePickerControllerDelegate

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info {

    NSString *mediaType = info[UIImagePickerControllerMediaType];

    [self dismissViewControllerAnimated:YES completion:nil];

    if ([mediaType isEqualToString:(NSString *)kUTTypeImage]) {
        UIImage *image = info[UIImagePickerControllerOriginalImage];
        selectedImage = image;
     //   self.watchImageView.image = selectedImage;

    }

    NSLog(@"no crash!!!!"); //that's a lie...
}

クラッシュメッセージはありません。ログには、アプリがメモリ警告を受信したことを記録してからクラッシュします。デバイスログには次のように記載されています。

TILメモリ不足のキラーはiOSでは「jetsam」と呼ばれます

誰かが私のコードを見て、私が間違っていることを教えてもらえますか？

4

1 に答える 1

3

メモリ警告を処理しなかったため、ウォッチドッグプロセスによって強制終了されました（iOSには、メモリの使用状況とアプリの起動時間を監視し、不正に見えるアプリを強制終了するプロセスがあります'）

ところで：TIL =今日私は学んだ：D

画像の縮小版を使用して表示します。

- (UIImage *)scaledCopyOfSize:(CGSize)newSize {
    CGImageRef imgRef = self.CGImage;

    CGFloat width = CGImageGetWidth(imgRef);
    CGFloat height = CGImageGetHeight(imgRef);

    CGAffineTransform transform = CGAffineTransformIdentity;
    CGRect bounds = CGRectMake(0, 0, width, height);
    if (width > newSize.width || height > newSize.height) {
        CGFloat ratio = width/height;
        if (ratio > 1) {
            bounds.size.width = newSize.width;
            bounds.size.height = bounds.size.width / ratio;
        }
        else {
            bounds.size.height = newSize.height;
            bounds.size.width = bounds.size.height * ratio;
        }
    }

    CGFloat scaleRatio = bounds.size.width / width;
    CGSize imageSize = CGSizeMake(CGImageGetWidth(imgRef), CGImageGetHeight(imgRef));
    CGFloat boundHeight;
    UIImageOrientation orient = self.imageOrientation;
    switch(orient) {

        case UIImageOrientationUp: //EXIF = 1
            transform = CGAffineTransformIdentity;
            break;

        case UIImageOrientationUpMirrored: //EXIF = 2
            transform = CGAffineTransformMakeTranslation(imageSize.width, 0.0);
            transform = CGAffineTransformScale(transform, -1.0, 1.0);
            break;

        case UIImageOrientationDown: //EXIF = 3
            transform = CGAffineTransformMakeTranslation(imageSize.width, imageSize.height);
            transform = CGAffineTransformRotate(transform, M_PI);
            break;

        case UIImageOrientationDownMirrored: //EXIF = 4
            transform = CGAffineTransformMakeTranslation(0.0, imageSize.height);
            transform = CGAffineTransformScale(transform, 1.0, -1.0);
            break;

        case UIImageOrientationLeftMirrored: //EXIF = 5
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeTranslation(imageSize.height, imageSize.width);
            transform = CGAffineTransformScale(transform, -1.0, 1.0);
            transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
            break;

        case UIImageOrientationLeft: //EXIF = 6
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeTranslation(0.0, imageSize.width);
            transform = CGAffineTransformRotate(transform, 3.0 * M_PI / 2.0);
            break;

        case UIImageOrientationRightMirrored: //EXIF = 7
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeScale(-1.0, 1.0);
            transform = CGAffineTransformRotate(transform, M_PI / 2.0);
            break;

        case UIImageOrientationRight: //EXIF = 8
            boundHeight = bounds.size.height;
            bounds.size.height = bounds.size.width;
            bounds.size.width = boundHeight;
            transform = CGAffineTransformMakeTranslation(imageSize.height, 0.0);
            transform = CGAffineTransformRotate(transform, M_PI / 2.0);
            break;

        default:
            [NSException raise:NSInternalInconsistencyException format:@"Invalid image orientation"];

    }

    if (UIGraphicsBeginImageContextWithOptions) {
        UIGraphicsBeginImageContextWithOptions(bounds.size, NO,
                                               /* 0.0f will scale to 1.0/2.0 depending on if the
                                                device has a high-resolution screen */
                                               0.0f);
    } else {
        UIGraphicsBeginImageContext(bounds.size);
    }

    CGContextRef context = UIGraphicsGetCurrentContext();

    if (orient == UIImageOrientationRight || orient == UIImageOrientationLeft) {
        CGContextScaleCTM(context, -scaleRatio, scaleRatio);
        CGContextTranslateCTM(context, -height, 0);
    }
    else {
        CGContextScaleCTM(context, scaleRatio, -scaleRatio);
        CGContextTranslateCTM(context, 0, -height);
    }

    CGContextConcatCTM(context, transform);

    CGContextDrawImage(context, CGRectMake(0, 0, width, height), imgRef);
    UIImage *imageCopy = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return imageCopy;
}
于 2012-12-18T17:13:55.700 に答える