//方法呼叫

NSMutableData *data = [NSMutableDatadataWithContentsOfFile:_SaveFilepath];

UIImage *myImage = [UIImageimageWithData:data];

STAlbumManager *stabumManager = [STAlbumManagersharedManager];

[stabumManager saveImage:myImage toAlbum:@"電子發票"completionHandler:^(UIImage *image, NSError *error){}];

//類實現

//

//  STAlbumManager.h

//  BSbracelet

//

//  Created by Christopher on 17/4/28.

//  Copyright © 2017年 ZTracy. All rights reserved.

//

#import <Foundation/Foundation.h>

#import <AssetsLibrary/AssetsLibrary.h>

@classUIImage;

typedefvoid (^STAlbumSaveHandler)(UIImage *image, NSError *error);

/**

 * @brief 將圖片寫入相簿,使用ALAssetLibrary

 *

 * @param  image    需要寫入的圖片

 * @param  album    相簿名稱，如果相簿不存在，則新建相簿

 * @param  completionHandler 回撥

 */

externvoid STImageWriteToPhotosAlbum(UIImage *image, NSString *album, STAlbumSaveHandler completionHandler);

@interface STAlbumManager : NSObject

+ (instancetype)sharedManager;

/**

 * @brief 將圖片寫入相簿,使用ALAssetLibrary

 *

 * @param  image    需要寫入的圖片

 * @param  album    相簿名稱，如果相簿不存在，則新建相簿

 * @param  completionHandler 回撥

 */

- (void)saveImage:(UIImage *)image toAlbum:(NSString *)album completionHandler:(STAlbumSaveHandler)completionHandler;

@end

@interface ALAssetsLibrary (STAssetsLibrary)

- (void)writeImage:(UIImage *)image toAlbum:(NSString *)album completionHandler:(STAlbumSaveHandler)completionHandler;

@end

//

//  STAlbumManager.m

//  BSbracelet

//

//  Created by Christopher on 17/4/28.

//  Copyright © 2017年 ZTracy. All rights reserved.

//

#import "STAlbumManager.h"

#import <UIKit/UIKit.h>

void STImageWriteToPhotosAlbum(UIImage *image, NSString *album, STAlbumSaveHandler completionHandler) {

    [[STAlbumManager sharedManager] saveImage:image toAlbum:album completionHandler:completionHandler];

}

@interface STAlbumManager ()

@property(nonatomic, strong) ALAssetsLibrary *assetsLibrary;

@end

@implementation STAlbumManager

static STAlbumManager *_sharedManager;

+ (instancetype)sharedManager {

static dispatch_once_t onceToken;

dispatch_once(&onceToken, ^{ _sharedManager = [[selfalloc] init]; });

return_sharedManager;

}

- (instancetype)init {

self = [superinit];

if (self) {

    }

returnself;

}

- (ALAssetsLibrary *)assetsLibrary {

if (!_assetsLibrary) {

_assetsLibrary = [[ALAssetsLibraryalloc] init];

    }

return_assetsLibrary;

}

- (void)saveImage:(UIImage *)image toAlbum:(NSString *)album completionHandler:(STAlbumSaveHandler)completionHandler {

    [self.assetsLibrarywriteImage:image

toAlbum:album

completionHandler:^(UIImage *image, NSError *error) {

if (completionHandler) {

                         completionHandler(image, error);

                     }

/// 注意，這裡每次都置空是因為期間如果操作相簿了，下次儲存之前希望能取到最新狀態。

self.assetsLibrary = nil;

                 }];

}

@end

@implementation ALAssetsLibrary (STAssetsLibrary)

- (void)writeImage:(UIImage *)image toAlbum:(NSString *)album completionHandler:(STAlbumSaveHandler)completionHandler {

    [self writeImageToSavedPhotosAlbum:image.CGImage

                           orientation:(ALAssetOrientation)image.imageOrientation

                       completionBlock:^(NSURL *assetURL, NSError *error) {

if (error) {

if (completionHandler) {

                                   completionHandler(image, error);

                               }

                           } else {

                               [self addAssetURL:assetURL

                                         toAlbum:album

                               completionHandler:^(NSError *error) {

if (completionHandler) {

                                       completionHandler(image, error);

                                   }

                               }];

                           }

                       }];

}

- (void)addAssetURL:(NSURL *)assetURL toAlbum:(NSString *)album completionHandler:(ALAssetsLibraryAccessFailureBlock)completionHandler {

void (^assetForURLBlock)(NSURL *, ALAssetsGroup *) = ^(NSURL *URL, ALAssetsGroup *group) {

        [self assetForURL:assetURL

              resultBlock:^(ALAsset *asset) {

                  [group addAsset:asset];

                  completionHandler(nil);

              }

             failureBlock:^(NSError *error) { completionHandler(error); }];

    };

__block ALAssetsGroup *group;

    [self enumerateGroupsWithTypes:ALAssetsGroupAlbum

                        usingBlock:^(ALAssetsGroup *_group, BOOL *stop) {

if ([album isEqualToString:[_group valueForProperty:ALAssetsGroupPropertyName]]) {

                                group = _group;

                            }

if (!_group) {

/// 迴圈結束

if (group) {

                                    assetForURLBlock(assetURL, group);

                                } else {

                                    [self addAssetsGroupAlbumWithName:album

                                                          resultBlock:^(ALAssetsGroup *group) { assetForURLBlock(assetURL, group); }

                                                         failureBlock:completionHandler];

                                }

                            }

                        }

                      failureBlock:completionHandler];

}

@end