IOS-save an image to a photo album

Source: Internet
Author: User

This is the current drawing generated by calling the api.

The code is simple:

1
UIImageWriteToSavedPhotosAlbum (drawImage. image, nil );

DrawImage is a UIImageView.

Is the nil parameter, which can be found in the UIKit Function Reference. UIImageWriteToSavedPhotosAlbum is a function in the UIKit framework.

Here we will talk about the meanings of the following three parameters:

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

Id is the target object, sel is the selector, that is, the method name on the target object, contextInfo is any pointer, will be passed to the method defined by the selector. It is generally used when a method is called after completion, or when an error is handled.

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