iOS中获取相册中图片的文件名

最新推荐文章于 2023-07-11 17:07:33 发布

转载最新推荐文章于 2023-07-11 17:07:33 发布 · 3.8k 阅读

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#iOS #library #图片

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本文详细介绍了如何在iOS应用中通过AssetsLibrary框架从相册选择图片，并解析了关键步骤及回调方法的实现。

原文地址：http://blog.liming.it/?p=90

第一步：给项目的 TARGETS -> Build Phases -> Link Binary With Libraries 增加框架链接 AssetsLibrary.Framework

第二步：文件中引入：
#import <AssetsLibrary/AssetsLibrary.h>

第三步：相册选择图片的回调方法 imagePickerController:didFinishPickingMediaWithInfo: 中，增加如下代码：

- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info;
{
    // get the ref url
    NSURL *refURL = [info valueForKey:UIImagePickerControllerReferenceURL];
    // define the block to call when we get the asset based on the url (below)
    ALAssetsLibraryAssetForURLResultBlock resultblock = ^(ALAsset *imageAsset)
    {
        ALAssetRepresentation *imageRep = [imageAsset defaultRepresentation];
        NSLog(@"[imageRep filename] : %@", [imageRep filename]);
    };
    
    // get the asset library and fetch the asset based on the ref url (pass in block above)
    ALAssetsLibrary* assetslibrary = [[ALAssetsLibrary alloc] init];
    [assetslibrary assetForURL:refURL resultBlock:resultblock failureBlock:nil];
    
    ...
}