IM模块-缓存图片视频简单工具类

Bertha 。 2022-07-19 02:39 127阅读 0赞

参考资料：

\[简书地址\]([http://www.jianshu.com/users/23d0ae412e19/latest\_articles][http_www.jianshu.com_users_23d0ae412e19_latest_articles])

#import "CacheHelper.h"
    
    @implementation CacheHelper
    
    
    + (instancetype)sharedInstance{
        static id _sharedInstance = nil;
        static dispatch_once_t oncePredicate;
        dispatch_once(&oncePredicate, ^{
            _sharedInstance = [[self alloc] init];
        });
        return _sharedInstance;
    }
    
    
    
    - (void)saveMediaTypeWithMediaType:(MessageBodyType)messageBodyType FileData:(NSData *)data  completion:(void (^)(NSString *mediaPath))completion{
    
        NSString *mediaPath = nil;
       
        switch (messageBodyType) {
            case MessageBodyTypePhoto:{ // 照片
            
                mediaPath = [self savePathFormediaType:MessageBodyTypePhoto];
                break;
            }
            case MessageBodyTypeVideo:{//视频
                
                mediaPath = [self savePathFormediaType:MessageBodyTypeVideo];
                break;
            }
            case MessageBodyTypeVoice:{//录音
            
                mediaPath = [self savePathFormediaType:MessageBodyTypeVoice];
                break;
            }
            default:
                break;
        }
        
         // 这个路径只能是文件，才能输入。 如果是文件夹，将不会被创建。
         [data writeToFile:mediaPath atomically:YES];
        
         completion ? completion(mediaPath) : nil;
    }
    
    
    /**
     *  Description: 保存数据
     *
     *  @param mediaType <#mediaType description#>
     *
     *  @return <#return value description#>
     */
    - (NSString *)savePathFormediaType:(MessageBodyType)mediaType{
        
        NSArray *pathArray = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
        NSString *path = pathArray.firstObject;
        
        NSDate *date = [[NSDate alloc]init];
        NSDateFormatter *formatter = [[NSDateFormatter alloc]init];
        formatter.dateFormat = @"YYYY-MM-dd";
        NSString *timeStr = [formatter stringFromDate:date];
        
        NSString *typeStr = nil;
        
        switch (mediaType) {
            case MessageBodyTypePhoto:{
                
                typeStr = [NSString stringWithFormat:@"%d.png",arc4random_uniform(1000)];
                break;
            }
            case MessageBodyTypeVideo:{
            
                typeStr = @"video.mov";
                break;
            }
            case MessageBodyTypeVoice:{
            
                typeStr = @"voice.m4a";
                break;
            }
            default:
                break;
        }
        
        path = [[path stringByAppendingPathComponent:timeStr] stringByAppendingString:typeStr];
        return path;
    }
    
    @end

[http_www.jianshu.com_users_23d0ae412e19_latest_articles]: http://www.jianshu.com/users/23d0ae412e19/latest_articles