获得APP缓存大小并清除缓存 iOS

读取缓存大小，目前计算了SDWebimage缓存大小，Documents目录下某个文件夹大小（类似可以继续添加）

-(CGFloat)readCacheSize;

清空缓存，目前清空了SDWebimage缓存，Documents目录下某个文件夹缓存（类似可以继续添加），Webview缓存

typedef void(^clearCacheSuccessBlock)(void);

-(void)clearCacheWithCompletionBlock:(nullable clearCacheSuccessBlock)completionBlock;

代码示例

-(CGFloat)readCacheSize
{
    CGFloat size=0;
    //获取SDWebImage磁盘缓存大小
    CGFloat size_SDWebImage = [self readSDWebImageCacheSize];
    size = size + size_SDWebImage;
    //获取短视频背景音乐缓存大小
    CGFloat size_ShortVideoBgm = [self readShortVideoBgmCacheSize];
    size = size + size_ShortVideoBgm;
    
    CGFloat sizeMB = size>0?(size/1024.0/1024.0):0;
    return sizeMB;
}

#pragma mark - 清空缓存
-(void)clearCacheWithCompletionBlock:(nullable clearCacheSuccessBlock)completionBlock{
    [HUDManager showLoadingHUDView:[UIViewController currentViewController].view withText:@"正在清除缓存···"];
    
    
    //清除H5缓存
    [self clearURLCacheAndHTTPCookie];
    
    //清除SDWebImage缓存
    [self clearSDWebImageCache];
    
    //清除短视频背景音乐缓存
    [self clearShortVideoBgmCache];
   
    
    dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.5 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
        [HUDManager  hideHUDView];
        [[UIViewController currentViewController].view showMessageWithText:@"已清空缓存"];
    });
}

//获取SDWebImage磁盘缓存大小
-(CGFloat)readSDWebImageCacheSize
{
    //SDImageCache
    NSLog(@"图片缓存路径%@",[SDImageCache sharedImageCache].diskCachePath);
    NSUInteger size = [[SDImageCache sharedImageCache] totalDiskSize];
    return size;
}

#pragma mark - 清空缓存
-(void)clearSDWebImageCache{
    [[SDImageCache sharedImageCache] clearDiskOnCompletion:^{
        
    }];
    [[SDImageCache sharedImageCache] clearMemory];
}

//清除webview缓存
- (void)clearURLCacheAndHTTPCookie
{
    NSSet *websiteDataTypes = [NSSet setWithArray:@[
                                                     WKWebsiteDataTypeDiskCache,
                                                     WKWebsiteDataTypeOfflineWebApplicationCache,
                                                     WKWebsiteDataTypeMemoryCache,
                                                     WKWebsiteDataTypeLocalStorage,
                                                     WKWebsiteDataTypeCookies,
                                                     WKWebsiteDataTypeSessionStorage,
                                                     WKWebsiteDataTypeIndexedDBDatabases,
                                                     WKWebsiteDataTypeWebSQLDatabases
                                                     ]];
    NSDate *dateFrom = [NSDate dateWithTimeIntervalSince1970:0];
    [[WKWebsiteDataStore defaultDataStore] removeDataOfTypes:websiteDataTypes modifiedSince:dateFrom completionHandler:^{
        // 结束回调
    }];
}

//获取短视频背景音乐缓存大小
-(CGFloat)readShortVideoBgmCacheSize
{
    float size = 0;
    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/bgm"];
    if(![[NSFileManager defaultManager] fileExistsAtPath:path]){
        return 0;
    }
    size=(float)[self totalSizeAtPath:path];
    return size;
}

//清除短视频背景音乐缓存
-(void)clearShortVideoBgmCache
{
    NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:@"Documents/bgm"];
    [[NSFileManager defaultManager] removeItemAtPath:path error:nil];
}

//获得当前文件夹及下面所有文件大小
- (uint64_t)totalSizeAtPath:(NSString *)path {
    NSFileManager *fileManager = NSFileManager.defaultManager;
    NSDictionary<NSString *, id> *attributes = [fileManager attributesOfItemAtPath:path error:NULL];
    uint64_t totalSize = [attributes fileSize];
    
    for (NSString *fileName in [fileManager enumeratorAtPath:path]) {
        attributes = [fileManager attributesOfItemAtPath:[path stringByAppendingPathComponent:fileName] error:NULL];
        totalSize += [attributes fileSize];
    }
    return totalSize;
}

备注：

以下代码只能获取当前文件夹大小，不能获得子目录文件夹大小

[attributes fileSize];