ios 开源项目 拍照片，存照片，显示单张，显示图片墙

待定

http://blog.csdn.net/shijiucdy/article/details/7404079

#import <AssetsLibrary/AssetsLibrary.h>


-(void)getImgs{
    
    dispatch_async(dispatch_get_main_queue(), ^{
        NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
        
        
        ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){
            NSLog(@"相册访问失败 =%@", [myerror localizedDescription]);
            if ([myerror.localizedDescription rangeOfString:@"Global denied access"].location!=NSNotFound) {
                  NSLog(@"无法访问相册.请在'设置->定位服务'设置为打开状态.");
            }else{
                NSLog(@"相册访问失败.");
            }
        };
        
        ALAssetsGroupEnumerationResultsBlock groupEnumerAtion = ^(ALAsset *result, NSUInteger index, BOOL *stop){
            if (result!=NULL) {
        
                if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
                    
                    NSString *urlstr=[NSString stringWithFormat:@"%@",result.defaultRepresentation.url];//图片的url
/*result.defaultRepresentation.fullScreenImage//图片的大图
result.thumbnail                             //图片的缩略图小图
//                    NSRange range1=[urlstr rangeOfString:@"id="];
//                    NSString *resultName=[urlstr substringFromIndex:range1.location+3];
//                    resultName=[resultName stringByReplacingOccurrencesOfString:@"&ext=" withString:@"."];//格式demo:123456.png
*/
                    
                  [self._dataArray addObject:urlstr];
                }
            }
           
        };
        ALAssetsLibraryGroupsEnumerationResultsBlock
        libraryGroupsEnumeration = ^(ALAssetsGroup* group, BOOL* stop){
            
            if (group == nil) 
            {
                
            }
            
            if (group!=nil) {
                NSString *g=[NSString stringWithFormat:@"%@",group];//获取相簿的组
                NSLog(@"gg:%@",g);//gg:ALAssetsGroup - Name:Camera Roll, Type:Saved Photos, Assets count:71

                NSString *g1=[g substringFromIndex:16 ] ;
                NSArray *arr=[[NSArray alloc] init];
                arr=[g1 componentsSeparatedByString:@","];
                NSString *g2=[[arr objectAtIndex:0] substringFromIndex:5];
                if ([g2 isEqualToString:@"Camera Roll"]) {
                    g2=@"相机胶卷";
                }
                NSString *groupName=g2;//组的name
                
                [group enumerateAssetsUsingBlock:groupEnumerAtion];
            }
            
        };
        
        ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
        [library enumerateGroupsWithTypes:ALAssetsGroupAll
                               usingBlock:libraryGroupsEnumeration 
                             failureBlock:failureblock];
        [library release];      
        [pool release];
    });  
    
}

//------------------------根据图片的url反取图片－－－－－

  ALAssetsLibrary *assetLibrary=[[ALAssetsLibrary alloc] init]; 
NSURL *url=[NSURL URLWithString:urlStr];
[assetLibrary assetForURL:url resultBlock:^(ALAsset *asset)  {
                UIImage *image=[UIImage imageWithCGImage:asset.thumbnail];
                cellImageView.image=image;
           
                }failureBlock:^(NSError *error) {
                    NSLog(@"error=%@",error);
            }
             ];
//－－－－－－－－－－－－－－－－－－－－－