How to save picture to iPhone photo library?

2018-06-30 04:59:09

我需要做什么才能将我的程序生成的图像（可能来自相机，可能不是）保存到iPhone上的系统照片库中？

You can use this function:

UIImageWriteToSavedPhotosAlbum(UIImage *image, 
                               id completionTarget, 
                               SEL completionSelector, 
                               void *contextInfo);

You only need completionTarget , completionSelector and contextInfo if you want to be notified when the UIImage is done saving, otherwise you can pass in nil .

See the official documentation for UIImageWriteToSavedPhotosAlbum() .

Deprecated in iOS 9.0.

There`s much more fast then UIImageWriteToSavedPhotosAlbum way to do it using iOS 4.0+ AssetsLibrary framework

    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];

    [library writeImageToSavedPhotosAlbum:[image CGImage] orientation:(ALAssetOrientation)[image imageOrientation] completionBlock:^(NSURL *assetURL, NSError *error){
    if (error) {
    // TODO: error handling
    } else {
    // TODO: success handling
    }
}];
[library release];

The simplest way is:

UIImageWriteToSavedPhotosAlbum(myUIImage, nil, nil, nil);

For Swift , you can refer to Saving to the iOS photo library using swift

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