┌──┐┌──┐┌──┐┌──┐┌──┐
││││└┐┌┘│┌┐││ ─┤└┐┌┘
││││ ││ │││││ ─┤ ││　
└┴┴┘ └┘ └┘└┘└──┘ └┘　

~~~ 有很多同学反馈需要支持arc版本， 会尽快支持 ~~~


# 使用
引入头文件

```objectivec
#import "MTDownloaderHelper.h"
#import "MTDownloadObjectModel.h"
#import "MTDownloadRequest.h"
#import "MTDownloadRecvData.h"	
```

声明下载池

```objectivec
@property (nonatomic, strong) MTDownloaderHelper * downloadHelper;

	...
	
self.downloadHelper = [[MTDownloaderHelper alloc] init];	
```

设置下载池同时最多可执行的任务数

```objectivec
[self.downloadHelper setMaxConcurrentTaskCount:5];
```

可给下载池中所有链接指定同一个下载超时的设置

```objectivec
[self.downloadHelper setTimeout:20];
```

向下载池中投入一个下载请求

```objectivec
MTDownloadRequest * request = [[MTDownloadRequest alloc] init];
MTDownloadObjectModel * downloadMdel = [[MTDownloadObjectModel alloc] init];
downloadMdel.url = @"http://www.baidu.com";
request.downloadModel = downloadMdel;
    
request.delegate  = self;
    
[self.downloadHelper addDownloadRequest:request];
```

取消一个下载请求，如此下载请求还未开始下载就从下载队列中移除。如已开始下开就中止当前下载

```objectivec
[self.downloadHelper cancelDownloadRequestByName:request.name];
```

使用`MTDownloadRequestDelegate` 获取下载结果

```objectivec
- (void) didTaskReceiveDataFinish   : (NSData *) theData    request:(MTDownloadRequest*) request
{
    NSLog(@"download ok");
}

- (void) taskDataDownloadFailed     : (NSError *) error     request:(MTDownloadRequest*) request
{
    NSLog(@"download failed:%@", error);
}
```



###自定义接收下载规则
可以继承`MTDownloadRecvDataFileSystem`自己制定下载规则，在此类中还提供了`processRecvAllDataFinish` 和 `processRecvAllDataFalied`这两个方法，重写就可以自定义处理当下载数据出错或者成功后的操作

比如 下载数据出错后需要清理缓存，下载成功后需要对文件进行解压、压缩、图片缩放等


```objectivec
#import "MTDownloadRecvData.h"

@interface AppImageDowloadRecv : MTDownloadRecvDataFileSystem

- (void) setFileName:(NSString *) fileName;

@end



#import "AppImageDowloadRecv.h"
#import "MTPath.h"
#import "MTFile.h"
#import "NSString+Extension.h"
#import "mcfDef.h"

@implementation AppImageDowloadRecv

- (id) init
{
    self = [super init];
    if(self)
    {
        self.localCacheDirPath = [MTPath Combine:kCache combinePath:@"appdata"];
        static BOOL created = FALSE;
        if (!created) {
            created = TRUE;
            [MTPath createDirectory:self.localCacheDirPath withAttributes:nil];
        }
    }
    
    return self;
}

- (void) setFileName:(NSString *) fileName
{
    if ([NSString isNilOrEmpty:fileName])
    {
        return;
    }
    
    self.name = fileName;
    self.localFullPath = [MTPath Combine:self.localCacheDirPath combinePath:fileName];
}

- (BOOL) bCached
{
    return [MTFile fileExistsAtPath:self.localFullPath];
}

- (NSData *) data
{
    if ([self bCached])
    {
        return [NSData dataWithContentsOfFile:self.localFullPath];
    }
    
    return nil;
}

@end

```



向下载池中投入一个自己定义下载规则的请求

```objectivec
MTDownloadRequest * request = [[MTDownloadRequest alloc] init];
    
MTDownloadObjectModel * downloadMdel = [[MTDownloadObjectModel alloc] init];
downloadMdel.url = @"http://www.baidu.com";
request.downloadModel = downloadMdel;
    
AppImageDowloadRecv * recvData = [[AppImageDowloadRecv alloc] init];
[recvData setFileName:@"filename"];
request.recvData = recvData;
    
request.delegate  = self;
    
[self.downloadHelper addDownloadRequest:request];
```



---
If you like this project, give a start ；）


---
Using Mtnet in your App? Let me know [weibo](http://weibo.com/wgblog)  or [gang.wang.china@gmail.com](gang.wang.china@gmail.com)  :).