[How the program will be a picture as wallpaper? ios there is no relevant API?

I just want the program to select a picture, and then set it to wallpaper, there is no way to achieve?
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This really is not
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cited a floor nicktang reply:

This really is not

How to achieve that? There is no other way?
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Put an image view directly in the final. . . .
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reference to the third floor seven0991 reply:

put an image view directly in the final. . . .

Is set ipad wallpaper, wallpaper app not own ...
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references, 4th Floor southbirdfly reply:

reference to the third floor seven0991 reply:

Put an image view directly in the final. . . .

Is set ipad wallpaper, wallpaper app is not their own ...

Oh, ah ....
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There is no way!