__weak ViewController *weakSelf = self; dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{ ALAssetsLibraryGroupsEnumerationResultsBlock listGroupBlock = ^(ALAssetsGroup *group, BOOL *stop) { if (group != nil) { [weakSelf.groupArrays addObject:group]; } else { [weakSelf.groupArrays enumerateObjectsUsingBlock:^(id obj, NSUInteger idx, BOOL *stop) { [obj enumerateAssetsUsingBlock:^(ALAsset *result, NSUInteger index, BOOL *stop) { if ([result thumbnail] != nil) { // 照片 if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypePhoto]){ // NSDate *date= [result valueForProperty:ALAssetPropertyDate]; // UIImage *image = [UIImage imageWithCGImage:[result thumbnail]]; // NSString *fileName = [[result defaultRepresentation] filename]; // NSURL *url = [[result defaultRepresentation] url]; // int64_t fileSize = [[result defaultRepresentation] size]; // // NSLog(@"date = %@",date); // NSLog(@"fileName = %@",fileName); // NSLog(@"url = %@",url); // NSLog(@"fileSize = %lld",fileSize); // // // UI的更新记得放在主线程,要不然等子线程排队过来都不知道什么年代了,会很慢的 // dispatch_async(dispatch_get_main_queue(), ^{ // self.litimgView.image = image; // }); NSLog(@"读取到照片了"); } // 视频 else if ([[result valueForProperty:ALAssetPropertyType] isEqualToString:ALAssetTypeVideo] ){ NSURL *url = [[result defaultRepresentation] url]; UIImage *image = [UIImage imageWithCGImage:[result thumbnail]]; NSLog(@"%@",url); dispatch_async(dispatch_get_main_queue(), ^{ self.litimgView.image = image; }); // 和图片方法类似 } } }]; }]; } }; ALAssetsLibraryAccessFailureBlock failureBlock = ^(NSError *error) { NSString *errorMessage = nil; switch ([error code]) { case ALAssetsLibraryAccessUserDeniedError: case ALAssetsLibraryAccessGloballyDeniedError: errorMessage = @"用户拒绝访问相册,请在<隐私>中开启"; break; default: errorMessage = @"Reason unknown."; break; } dispatch_async(dispatch_get_main_queue(), ^{ UIAlertView *alertView = [[UIAlertView alloc]initWithTitle:@"错误,无法访问!" message:errorMessage delegate:self cancelButtonTitle:@"确定" otherButtonTitles:nil, nil]; [alertView show]; }); }; ALAssetsLibrary *assetsLibrary = [[ALAssetsLibrary alloc] init]; [assetsLibrary enumerateGroupsWithTypes:ALAssetsGroupAll usingBlock:listGroupBlock failureBlock:failureBlock]; });
时间: 2024-10-13 16:18:25