blocks|key|323113|text|您可以使用UIImageWriteToSavedPhotosAlbum()函数。|type|unstyled|depth|inlineStyleRanges|offset|length|style|CODE|entityRanges|data|323114|//Let's+say+the+image+you+want+to+save+is+in+a+UIImage+called+"imageToBeSaved"
UIImageWriteToSavedPhotosAlbum(imageToBeSaved,+nil,+nil,+nil);|code-block|syntax|javascript|323115|编辑：|323116|//ViewController.m
-+(IBAction)onClickSavePhoto:(id)sender{

++++UIImageWriteToSavedPhotosAlbum(imageToBeSaved,+nil,+nil,+nil);
}|323117|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/library/ios/documentation/uikit/reference/UIKitFunctionReference/Reference/reference.html#//apple_ref/doc/uid/TP40006894-CH3-SW29^0|5|W|5|W|0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|W|8|@$9|X|A|Y|B|C]]|D|@$9|Z|A|10|1|11]]|E|$]]|$1|F|3|G|5|H|7|12|8|@]|D|@]|E|$I|J]]|$1|K|3|L|5|6|7|13|8|@]|D|@]|E|$]]|$1|M|3|N|5|H|7|14|8|@]|D|@]|E|$I|J]]|$1|O|3|-4|5|6|7|15|8|@]|D|@]|E|$]]]|P|$Q|$5|R|S|T|E|$U|V]]]]

You use the <a href="http://developer.apple.com/library/ios/documentation/uikit/reference/UIKitFunctionReference/Reference/reference.html#//apple_ref/doc/uid/TP40006894-CH3-SW29" rel="noreferrer"><code>UIImageWriteToSavedPhotosAlbum()</code></a> function.

<pre><code>//Let's say the image you want to save is in a UIImage called "imageToBeSaved"
UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);
</code></pre>

Edit:

<pre><code>//ViewController.m
- (IBAction)onClickSavePhoto:(id)sender{

 UIImageWriteToSavedPhotosAlbum(imageToBeSaved, nil, nil, nil);
}
</code></pre>

blocks|key|323150|text|作为参考，您可以使用类似的方式保存视频：|type|unstyled|depth|inlineStyleRanges|entityRanges|data|323151|UISaveVideoAtPathToSavedPhotosAlbum(videoPath,+nil,+nil,+nil);|code-block|syntax|javascript|323152|您可能希望保存视频以上载到Instagram，例如：|323153|//+Save+video+to+camera+roll;+we+can+share+to+Instagram+from+there.
-(void)didTapShareToInstagram:(id)sender+{+
++++UISaveVideoAtPathToSavedPhotosAlbum(self.videoPath,+self,+@selector(video:didFinishSavingWithError:contextInfo:),+(void*)CFBridgingRetain(@{@"caption"+:+caption}));
}

-+(void)+++++++++++++++video:+(NSString+*)+videoPath
++++didFinishSavingWithError:+(NSError+*)+error
+++++++++++++++++contextInfo:+(void+*)+contextInfoPtr+{

++++NSDictionary+*contextInfo+=+CFBridgingRelease(contextInfoPtr);
++++NSString+*caption+++++++++=+contextInfo[@"caption"];

++++NSString+*escapedString+++=+[videoPath+stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet+URLHostAllowedCharacterSet]];+//+urlencodedString
++++NSString+*escapedCaption++=+[caption+stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet+URLHostAllowedCharacterSet]];+//+urlencodedString

++++NSURL+*instagramURL+++++++=+[NSURL+URLWithString:[NSString+stringWithFormat:@"instagram://library?AssetPath=%25@&InstagramCaption=%25@",+escapedString,+escapedCaption]];

++++[[UIApplication+sharedApplication]+openURL:instagramURL];
}|323154|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

For reference, you can save videos in a similar manner:

<pre><code>UISaveVideoAtPathToSavedPhotosAlbum(videoPath, nil, nil, nil);
</code></pre>

You might want to save a video to upload to Instagram, for example:

<pre><code>// Save video to camera roll; we can share to Instagram from there.
-(void)didTapShareToInstagram:(id)sender { 
 UISaveVideoAtPathToSavedPhotosAlbum(self.videoPath, self, @selector(video:didFinishSavingWithError:contextInfo:), (void*)CFBridgingRetain(@{@"caption" : caption}));
}

- (void) video: (NSString *) videoPath
 didFinishSavingWithError: (NSError *) error
 contextInfo: (void *) contextInfoPtr {

 NSDictionary *contextInfo = CFBridgingRelease(contextInfoPtr);
 NSString *caption = contextInfo[@"caption"];

 NSString *escapedString = [videoPath stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLHostAllowedCharacterSet]]; // urlencodedString
 NSString *escapedCaption = [caption stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLHostAllowedCharacterSet]]; // urlencodedString

 NSURL *instagramURL = [NSURL URLWithString:[NSString stringWithFormat:@"instagram://library?AssetPath=%@&amp;InstagramCaption=%@", escapedString, escapedCaption]];

 [[UIApplication sharedApplication] openURL:instagramURL];
}
</code></pre>

blocks|key|540119|text|将图像保存在Swift+4的照片库中|type|unstyled|depth|inlineStyleRanges|entityRanges|data|540120|在info.plist中添加“隐私-图片库添加使用说明”|540121|然后使用以下代码保存图像|540122|UIImageWriteToSavedPhotosAlbum(imageView.image!,+nil,+nil,+nil)|code-block|syntax|javascript|540123|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|6|7|O|8|@]|9|@]|A|$]]|$1|F|3|G|5|H|7|P|8|@]|9|@]|A|$I|J]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

<h2>Save the image in photo library in Swift 4</h2>
Add &quot;Privacy - Photo Library Additions Usage Description&quot; in info.plist
Then use following code to save image
<pre><code>UIImageWriteToSavedPhotosAlbum(imageView.image!, nil, nil, nil)
</code></pre>

I am new to Xcode (using 4.3) and am not sure how to save an image to the device's camera roll. All that I have done so far is set up an IBAction for the button to save the image. What library method or function can I use to save an image to the user's camera roll?

How can I save an image to the camera roll?

Swift

Xcode

我刚接触Xcode (使用4.3)，不确定如何将图像保存到设备的相机胶卷中。到目前为止，我所做的一切只是为按钮设置了一个IBAction来保存图像。我可以使用什么库方法或函数将图像保存到用户的相机胶卷中？

问如何将图像保存到相机胶卷？
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