IOS之开发Block

   void(^block)();
    
    //以下定义block语句块,然后存储到block变量当中
   block =^void(){
       NSLog(@"this is block");
   };

int (^myAdd) (int x,int y)= ^int (int x,int y){
        return x+y;
    };
    int s =myAdd(12,20);
    NSLog(@"s===%d",s);

//1 GET请求 （html,json,xml）
//    [self testGetRequest];
    //2POST请求
//    [self testPostRequest];
    //3  上传文件，上传图片
    
//    [self testUploadFile];
    
    //4.下载文件
//    [self testDownloadFile];
    //5.监控网络形态
    [self testMonitorNetworkStatus];
    //6.图片异步下载（可替代SDwebimage）
    //可加上 UIkit +AFNetworking.h
    
    //7. 有些请求有特殊的请求头
    //
 
}

-(void)testMonitorNetworkStatus
{
    
    AFHTTPRequestOperationManager *manager =[[AFHTTPRequestOperationManager alloc] initWithBaseURL:[NSURL URLWithString:@"www.baidu.com"]];
    
    [manager.reachabilityManager setReachabilityStatusChangeBlock:^(AFNetworkReachabilityStatus status) {
        NSDictionary *dict =@{@(AFNetworkReachabilityStatusUnknown):@"未知",@(AFNetworkReachabilityStatusNotReachable):@"不可达",@(AFNetworkReachabilityStatusReachableViaWWAN):@"GPRS",@(AFNetworkReachabilityStatusReachableViaWiFi):@"WIFI"};
        NSLog(@"状态为  %@",dict[@(status)]);
        
    }];
    //开启状态监视
    [manager.reachabilityManager startMonitoring];

}

-(void)testDownloadFile
{
    
//创建会话管理器对象（通过默认配置）
NSString *urlString =@"http://imgcache.qq.com/club/item/avatar/zip/7/i87/all.zip";
    AFURLSessionManager *manager =[[AFURLSessionManager alloc] initWithSessionConfiguration:[NSURLSessionConfiguration defaultSessionConfiguration]];

    NSURLSessionDownloadTask *task =[manager downloadTaskWithRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:urlString]] progress:nil destination:^NSURL *(NSURL *targetPath, NSURLResponse *response) {
        NSString *path =[NSString stringWithFormat:@"%@/Documents/all.zip",NSHomeDirectory()];
        NSLog(@"path  ==%@",path);
        return [NSURL fileURLWithPath:path];
        
    } completionHandler:^(NSURLResponse *response, NSURL *filePath, NSError *error) {
        NSLog(@"下载wancheng");
    }];

    [task resume];

 //返回文件保存的位置 
}

//测试上传文件
-(void)testUploadFile
{
  NSString *urlString =@"http://quiet.local/uploadtest/upload.php";
    //参数名 ;image  :参数值是图片
    AFHTTPRequestOperationManager *manager =[AFHTTPRequestOperationManager manager];
    manager.responseSerializer =[AFHTTPResponseSerializer serializer];
    
   [manager POST:urlString parameters:nil constructingBodyWithBlock:^(id<AFMultipartFormData> formData) {
       //上传的数据附加到请求中
       //mimetype 每种文件都有一个类型
       NSString *path =[[NSBundle mainBundle] pathForResource:@"back2.jpg" ofType:nil];
       
       
       [formData appendPartWithFileURL:[NSURL fileURLWithPath:path] name:@"image" fileName:@"jayzhang.jpg" mimeType:@"image/jpeg" error:nil
        ];
   } success:^(AFHTTPRequestOperation *operation, id responseObject) {
       NSString *str  =[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
       NSLog(@"str ===%@",str);
       
   } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
       NSLog(@"erro == %@",error);

   }];
}

-(void)testPostRequest
{
//接口，POST接口 ：http://quiet.local/testdir/login.php
   
 NSString *urlString1 =@"http://quiet.local/testdir/login.php";

    AFHTTPRequestOperationManager *manager =[AFHTTPRequestOperationManager manager];
    manager.responseSerializer =[AFHTTPResponseSerializer serializer];
    
    [manager POST:urlString1 parameters:@{@"user":@"quiet",@"password":@"123"} success:^(AFHTTPRequestOperation *operation, id responseObject) {
        
                NSString *str  =[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str ===%@",str);

    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"erro == %@",error);

    }];

    

}



-(void)testGetRequest
{
  NSString *urlString =@"http://www.baidu.com";
    urlString =@"http://m.weather.com.cn/data/101010100.html";
    //定义AFNetworking管理
    
    AFHTTPRequestOperationManager *manager =[AFHTTPRequestOperationManager manager];
    
    //默认认为数据是JSON，content-type 也是JSON，responseObject 是解析的字典和数组。不是产生错误Code =-1016,解决:设置解析器为HTTP形式，下载回来是NSData.
    
    manager.responseSerializer =[AFHTTPResponseSerializer serializer];
    
    [manager GET:urlString parameters:nil success:^(AFHTTPRequestOperation *operation, id responseObject) {
//        NSLog(@"a ==%@",responseObject);
        
        NSString *str  =[[NSString alloc] initWithData:responseObject encoding:NSUTF8StringEncoding];
        NSLog(@"str ===%@",str);
        
    } failure:^(AFHTTPRequestOperation *operation, NSError *error) {
        NSLog(@"erro == %@",error);
    }];

}