不使用UIImagePickerControllerOriginalImage获取相册图片

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一般用imagePickerController获取到dic以后常用的方法是使用

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UIImage *image = [dic objectForKey:@"UIImagePickerControllerOriginalImage"];

来获取原图，但是我使用这个方法获取到得图片并不是原图，而是尺寸经过压缩后的，后来找到了一个新的方法来进行获取 直接贴代码

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[cpp]?view plaincopy

1. ALAssetsLibrary?*library?=?[[ALAssetsLibrary?alloc]?init];??
2. ?????[library?assetForURL:[dic?objectForKey:UIImagePickerControllerReferenceURL]??
3. ??????????????resultBlock:^(ALAsset?*asset)??
4. ??????{??
5. ??????????ALAssetRepresentation?*representation?=?[asset?defaultRepresentation];??
6. ??????????CGImageRef?imgRef?=?[representation?fullResolutionImage];??
7. ??????????UIImage?*image?=?[UIImage?imageWithCGImage:imgRef??
8. ?????????????????????????????????????????????scale:representation.scale??
9. ???????????????????????????????????????orientation:(UIImageOrientation)representation.orientation];??
10. ??????????NSData?*?data?=?UIImageJPEGRepresentation(image,?0.5);??????????????????
11. ??
12. ??????}failureBlock:^(NSError?*error){??
13. ??????????NSLog(@"couldn‘t?get?asset:?%@",?error);??
14. ??????}??
15. ??????];??