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我想按名称从 iphone 中的图库中获取图像.. 就像我在图库 one.png、two.png、three.png 中有 10 张照片等等。我想使用两个.png。我怎样才能得到那个图像。并在我的 UIImageView 中使用它。这可能吗？

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2 回答 2

2

imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)

在这个方法中写

UIImage *image = [info objectForKey:UIImagePickerControllerOriginalImage];
[ImageViewName setImage:image];
[picker1 dismissViewControllerAnimated:YES completion:nil];
于 2012-11-28T12:36:21.020 回答
1

要从照片库中挑选图像，您可以使用UIImagePickerController。

如果你有图片的assetlibrary url，那么你可以使用以下代码：

typedef void (^ALAssetsLibraryAssetForURLResultBlock)(ALAsset *asset);
typedef void (^ALAssetsLibraryAccessFailureBlock)(NSError *error);    

ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *myasset)
{
    ALAssetRepresentation *rep = [myasset defaultRepresentation];
    CGImageRef iref = [myasset aspectRatioThumbnail];

    UIImage *images;
    if (iref) 
    {
        images = [UIImage imageWithCGImage:iref scale:[rep scale] orientation:(UIImageOrientation)[rep orientation]];
    }
    else
    {
        images = [UIImage imageNamed:@"Noimagey.png"];
    }
    dispatch_async(dispatch_get_main_queue(), ^{
            yourImageView.contentMode = UIViewContentModeScaleAspectFit;
            [yourImageView setImage:images];

            });
};

ALAssetsLibraryAccessFailureBlock failureblock  = ^(NSError *myerror)
{
    UIImage *images = [UIImage imageNamed:@"Nofile.png"];
    dispatch_async(dispatch_get_main_queue(), ^{

        [yourImageView setImage:images];

        });

};    

NSURL *asseturl = [NSURL URLWithString:yourAssetUrl];
ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
[assetslibrary assetForURL:asseturl resultBlock:resultblock failureBlock:failureblock];

如果您使用资产库来挑选图像，请始终记住：

  1. 这是一个异步过程
  2. 始终从资产块将图像绑定到主线程中的 imageView
于 2012-11-28T12:49:07.213 回答