iOS遍历相册中的图片

Posted 2020-08-14

 1 //获取相册的所有图片
 2 - (void)reloadImagesFromLibrary
 3 {
 4     self.images = [[NSMutableArray alloc] init];
 5     dispatch_async(dispatch_get_main_queue(), ^{
 6          
 7         @autoreleasepool {
 8             ALAssetsLibraryAccessFailureBlock failureblock = ^(NSError *myerror){
 9                 NSLog(@"相册访问失败 =%@", [myerror localizedDescription]);
10                 if ([myerror.localizedDescription rangeOfString:@"Global denied access"].location!=NSNotFound) {
11                     NSLog(@"无法访问相册.请在‘设置->定位服务‘设置为打开状态.");
12                 }else{
13                     NSLog(@"相册访问失败.");
14                 }
15             };
16              
17             ALAssetsGroupEnumerationResultsBlock groupEnumerAtion = ^(ALAsset *result, NSUInteger index, BOOL *stop){
18                 if (result!=NULL) {
19                      
20                     if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]) {
21                          
22                         NSString *urlstr=[NSString stringWithFormat:@"%@",result.defaultRepresentation.url];//图片的url
23                         [self.images addObject:urlstr];
24                         //NSLog(@"urlStr is %@",urlstr);
25                         //result.defaultRepresentation.fullScreenImage//图片的大图
26                         //result.thumbnail                             //图片的缩略图小图
27                         NSRange range1=[urlstr rangeOfString:@"id="];
28                         NSString *resultName=[urlstr substringFromIndex:range1.location+3];
29                        resultName=[resultName stringByReplacingOccurrencesOfString:@"&ext=" withString:@"."];//格式demo:123456.png
30                         
31                     }
32                 }
33             };
34              
35             ALAssetsLibraryGroupsEnumerationResultsBlock libraryGroupsEnumeration = ^(ALAssetsGroup* group, BOOL* stop){
36                  
37                 if (group == nil)
38                 {
39                      
40                 }
41                  
42                 if (group!=nil) {
43                     NSString *g=[NSString stringWithFormat:@"%@",group];//获取相簿的组
44                     NSLog(@"gg:%@",g);//gg:ALAssetsGroup - Name:Camera Roll, Type:Saved Photos, Assets count:71
45                      
46                     NSString *g1=[g substringFromIndex:16 ] ;
47                     NSArray *arr=[[NSArray alloc] init];
48                     arr=[g1 componentsSeparatedByString:@","];
49                     NSString *g2=[[arr objectAtIndex:0] substringFromIndex:5];
50                     if ([g2 isEqualToString:@"Camera Roll"]) {
51                         g2=@"相机胶卷";
52                     }
53                     NSString *groupName=g2;//组的name
54                      
55                     [group enumerateAssetsUsingBlock:groupEnumerAtion];
56                 }
57                  
58             };
59              
60             ALAssetsLibrary* library = [[ALAssetsLibrary alloc] init];
61             [library enumerateGroupsWithTypes:ALAssetsGroupAll
62                                    usingBlock:libraryGroupsEnumeration
63                                  failureBlock:failureblock];
64         }
65          
66     });
67 }