将一个UIView保存至相册



//保存当前view到相册  
UIGraphicsBeginImageContext(currentView.bounds.size);     //currentView 当前的view  
[currentView.layer renderInContext:UIGraphicsGetCurrentContext()];  
UIImage *viewImage = UIGraphicsGetImageFromCurrentImageContext();  
UIGraphicsEndImageContext();  
UIImageWriteToSavedPhotosAlbum(viewImage, nil, nil, nil);  


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