之前写过UIImagePickerController调取系统相册图片（选取单张照片，多用于用户头像）

1.pod导入

pod 'CTAssetsPickerController'

2.添加头文件

#import <CTAssetsPickerController/CTAssetsPickerController.h>

3.添加delegate

<CTAssetsPickerControllerDelegate>

4.实现

- (void)upLoading { [PHPhotoLibraryrequestAuthorization:^(PHAuthorizationStatus status){ if (status !=PHAuthorizationStatusAuthorized)return; dispatch_async(dispatch_get_main_queue(), ^{ CTAssetsPickerController *picker = [[CTAssetsPickerControlleralloc] init]; picker.delegate =self; // 显示选择的索引 picker.showsSelectionIndex =YES; // 设置相册的类型：相机胶卷 +自定义相册 picker.assetCollectionSubtypes =@[ @(PHAssetCollectionSubtypeSmartAlbumUserLibrary), @(PHAssetCollectionSubtypeAlbumRegular)]; // 不需要显示空的相册 picker.showsEmptyAlbums =NO; [selfpresentViewController:pickeranimated:YEScompletion:nil]; }); }];}-(BOOL)assetsPickerController:(CTAssetsPickerController *)picker shouldSelectAsset:(PHAsset *)asset{ NSInteger max =9; if (picker.selectedAssets.count >= max) { UIAlertController *alert = [UIAlertControlleralertControllerWithTitle:@"提示"message:[NSStringstringWithFormat:@"最多选择%zd张图片", max] preferredStyle:UIAlertControllerStyleAlert]; [alert addAction:[UIAlertActionactionWithTitle:@"好的"style:UIAlertActionStyleDefaulthandler:nil]]; [picker presentViewController:alertanimated:YEScompletion:nil]; // 这里不能使用self来modal别的控制器，因为此时self.view不在window上 returnNO; } returnYES;}-(void)assetsPickerController:(CTAssetsPickerController *)picker didFinishPickingAssets:(NSArray *)assets{ NSArray *array =NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,NSUserDomainMask,YES); NSString *documents = [arraylastObject]; NSString *documentPath = [documentsstringByAppendingPathComponent:@"arrayXML.xml"]; NSArray *dataArray = [NSArrayarrayWithArray:assets]; [dataArray writeToFile:documentPathatomically:YES]; NSArray *resultArray = [NSArrayarrayWithContentsOfFile:documentPath]; NSLog(@"%@", documentPath); // 关闭图片选择界面 [picker dismissViewControllerAnimated:YEScompletion:nil]; // 遍历选择的所有图片 self.plCollection.photoArray = assets; for (NSInteger i =0; i < assets.count; i++) { // 基本配置 CGFloat scale = [UIScreenmainScreen].scale; PHImageRequestOptions *options = [[PHImageRequestOptionsalloc] init]; options.resizeMode =PHImageRequestOptionsResizeModeExact; options.deliveryMode =PHImageRequestOptionsDeliveryModeHighQualityFormat; PHAsset *asset = assets[i]; CGSize size =CGSizeMake(asset.pixelWidth / scale, asset.pixelHeight / scale);// // 获取图片 [[PHImageManagerdefaultManager] requestImageForAsset:assettargetSize:size contentMode:PHImageContentModeDefaultoptions:options resultHandler:^(UIImage *_Nullable result,NSDictionary *_Nullable info) { NSData *imageData =UIImageJPEGRepresentation([selfimageWithImageSimple:resultscaledToSize:CGSizeMake(200,200)], 0.5); [selfossUpload:imageData]; }]; }}

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