ios-获取系统相簿里边的所有照片

#import<AssetsLibrary/AssetsLibrary.h>

-(void)getImgs{

dispatch_async(dispatch_get_main_queue(), ^{

NSAutoreleasePool *pool = [[NSAutoreleasePoolalloc] init];

ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){

NSLog(@"相册访问失败 =%@", [myerrorlocalizedDescription]);

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 arrayWithArray:[g1componentsSeparatedByString:@","]];

NSString *g2=[[arr objectAtIndex:0]substringFromIndex:5];

if ([g2 isEqualToString:@"Camera Roll"]) {

g2=@"相机胶卷";

}

NSString *groupName=g2;//组的name

[groupenumerateAssetsUsingBlock:groupEnumerAtion];

}

};

ALAssetsLibrary* library = [[ALAssetsLibraryalloc] init];

[libraryenumerateGroupsWithTypes:ALAssetsGroupAll

usingBlock:libraryGroupsEnumeration

failureBlock:failureblock];

[library release];

[pool release];

});

}

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

ALAssetsLibrary *assetLibrary=[[ALAssetsLibraryalloc] init];

NSURL *url=[NSURLURLWithString:urlStr];

[assetLibrary assetForURL:url resultBlock:^(ALAsset *asset)  {

UIImage *image=[UIImage imageWithCGImage:asset.thumbnail];

cellImageView.image=image;

}failureBlock:^(NSError *error) {

NSLog(@"error=%@",error);

}

];

//－－－－－－－－－－－－－－－－－－－－－