iOS-获取相册最后一张照片

getLastestPhoto

#pragma mark 获取相册最后一张照片
- (void)p_getLastestPhoto
{
    ALAssetsLibrary *library = [[ALAssetsLibrary alloc] init];
    
    __block UIImage *imagelast;
    // Enumerate just the photos and videos group by using ALAssetsGroupSavedPhotos.
    
    [library enumerateGroupsWithTypes:ALAssetsGroupSavedPhotos usingBlock:^(ALAssetsGroup *group, BOOL *stop) {
        
        // Within the group enumeration block, filter to enumerate just photos.
        [group setAssetsFilter:[ALAssetsFilter allPhotos]];
        
        // Chooses the photo at the last index
        [group enumerateAssetsWithOptions:NSEnumerationReverse usingBlock:^(ALAsset *alAsset, NSUInteger index, BOOL *innerStop) {
            // The end of the enumeration is signaled by asset == nil.
            if (alAsset) {
                ALAssetRepresentation *representation = [alAsset defaultRepresentation];
                UIImage *latestPhoto = [UIImage imageWithCGImage:[representation fullScreenImage]];
                
                imagelast = latestPhoto;
                
                // Stop the enumerations
                *stop = YES; *innerStop = YES;
                self.screenshotImage = imagelast;
                
                // Do something interesting with the AV asset.
                //[self sendTweet:latestPhoto];
            }
        }];
    } failureBlock: ^(NSError *error) {
        // Typically you should handle an error more gracefully than this.
        MGJLog(@"SSC获取截图失败");
    }];
}