图象加载

NSString *path =[[NSBundle mainBundle] pathForResource:@"icon" ofType:@"png"];
MyImage = [UIImage imageWithContentsOfFile:path];

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);