iOS-网络编程之微博发说说,图片的方法封装

1.jpg

该类的封装主要是为了解决如何通过网络加载数据(JSON)
封装的主要流程:
1.url(可带参数)
2.request(请求头,请求体)
3.session
4.task
5.resume

这次我们封装了三个方法:
//使用get方法
+(void)getWithURL:(NSString)urlStr
params:(NSMutableDictionary)params
headerField:(NSMutableDictionary*)headerFields
comPletionBlock:(CompletionBlock)block;

//post请求
/*发送post请求
*url:本地url的字符串
*params:参数(字典) 简单的数据
headerField:请求头
formData:请求体(复杂的数据 imageData)
block:成功的block
@return:nil
/
//使用post方法
+(void)postWithURL:(NSString)urlStr
params:(NSMutableDictionary)params
headerField:(NSMutableDictionary)headerFields
formData:(NSData)formData
comPletionBlock:(CompletionBlock)block;

//post和get方法混合封装
+(void) getAndPostWithURL:(NSString)urlStr
params:(NSMutableDictionary)params
httpMethod:(NSString ) mothod
headerField:(NSMutableDictionary)headerFields
formData:(NSData*)formData
comPletionBlock:(CompletionBlock)block;

主要实现代码:
#import "WCDataService.h"
#define boundary @"asdfasdfas"
//需要访问的网址前缀
#define BaseURL @"https://api.weibo.com/2/"
@implementation WCDataService

+(void)getWithURL:(NSString*)urlStr
       params:(NSMutableDictionary*)params
  headerField:  (NSMutableDictionary*)headerFields
comPletionBlock:(CompletionBlock)block{
//使用NSUrlSession    
//1 url
NSString *urlString = [BaseURL stringByAppendingString:urlStr];

//添加一个公共的请求头
//    [request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];        
    //@{key1:value1,key2:value2}
    //装换成字符串
    //key1=value1&key2=value2    
if (params == nil) {        
    params = [NSMutableDictionary dictionary];
}
    NSMutableString *paramStr = [NSMutableString string];        
    for (NSString *key in params) {            
        id value = [params objectForKey:key];            
        NSString *keyValue = [NSString stringWithFormat:@"%@=%@&",key,value];            
        [paramStr appendFormat:@"%@",keyValue];            
    }
    //循环完后 paramStr:  key1=value1&key2=value2&        
    //删除字符串最后一个字符  key1=value1&key2=value2
    [paramStr deleteCharactersInRange:NSMakeRange(paramStr.length-1, 1)];
    
NSString *fullUrlStr = [urlString stringByAppendingFormat:@"?%@",paramStr];

NSURL *url = [NSURL URLWithString:fullUrlStr];

//2 request 请求( 请求体)
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120];
//请求方式
[request setHTTPMethod:@"GET"];
//请求头
[request setAllHTTPHeaderFields:headerFields];
//3 session
NSURLSession *session = [NSURLSession sharedSession];

//4 task
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {       
    if (error != nil) {            
        NSLog(@"error = %@",error);           
        return;
    }        
    NSHTTPURLResponse *httpRes = (NSHTTPURLResponse*)response;
       if (httpRes.statusCode == 200) {            
        id jsonData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];            
        //block的回调
       //作用:将新的数据显示在界面上,要回调主线程            dispatch_async(dispatch_get_main_queue(), ^{               
            block(jsonData);
        });            
    }else{            
        NSLog(@"%ld",httpRes.statusCode);            
    }        
}];
//5 resume
[task resume];
}

+(void)postWithURL:(NSString*)urlStr
        params:(NSMutableDictionary*)params
   headerField:(NSMutableDictionary*)headerFields
      formData:(NSData*)formData
comPletionBlock:(CompletionBlock)block{

//使用NSUrlSession    
//1 url
NSString *urlString = [BaseURL stringByAppendingString:urlStr];
NSURL *url = [NSURL URLWithString:urlString];

//2 request 请求( 请求体)
NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120];
//请求方式
[request setHTTPMethod:@"POST"];
//请求头
[request setAllHTTPHeaderFields:headerFields];

//添加一个公共的请求头
//    [request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];

//重点:请求体
if (formData ==nil) {
    
    //发微博文字 (简单数据)
    
    //@{key1:value1,key2:value2}
    //装换成字符串
    //key1=value1&key2=value2
    
    NSMutableString *paramStr = [NSMutableString string];
    
    
    for (NSString *key in params) {
        
        id value = [params objectForKey:key];
        
        NSString *keyValue = [NSString stringWithFormat:@"%@=%@&",key,value];
        
        [paramStr appendFormat:@"%@",keyValue];
        
    }
    //循环完后 paramStr:  key1=value1&key2=value2&
    
    //删除字符串最后一个字符
    [paramStr deleteCharactersInRange:NSMakeRange(paramStr.length-1, 1)];
    
    //字符串---->NSData
    NSData *bodyData = [paramStr dataUsingEncoding:NSUTF8StringEncoding];
    
    [request setHTTPBody:bodyData];
    
}else{

    //发微博+图片 (有复杂数据)
    
    //(2)请求头
    //上传任务,必须要添加的字段
    NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; charset=utf-8;boundary=%@",boundary];
    
    [request setValue:contentType forHTTPHeaderField:@"Content-Type"];
    
    //(3)请求体
    //[1] 文字(参数)  [2]data:(formData)
    NSData *bodydata = [self buildBodyDataWithParams:params formData:formData];
    
    [request setHTTPBody:bodydata];
    
}

//3 session
NSURLSession *session = [NSURLSession sharedSession];

//4 task
NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
   
    if (error != nil) {
        
        NSLog(@"error = %@",error);
        
        return;
    }
    
    NSHTTPURLResponse *httpRes = (NSHTTPURLResponse*)response;
    
    if (httpRes.statusCode == 200) {
        
        id jsonData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
        
        //block的回调
        //作用:将新的数据显示在界面上,要回调主线程
        dispatch_async(dispatch_get_main_queue(), ^{
        
            block(jsonData);
        });
        
    }else{
    
        NSLog(@"%ld",httpRes.statusCode);
        
    }
    
}];

//5 resume
[task resume];

}

  +(NSData*)buildBodyDataWithParams:(NSMutableDictionary*)params formData:(NSData*)formData{

//(1)bodyStr

NSMutableString *bodyStr = [NSMutableString string];
for (NSString *key in params) {
    
    id value = [params objectForKey:key];
    
    [bodyStr appendFormat:@"--%@\r\n",boundary];//\n:换行 \n:切换到行首
    [bodyStr appendFormat:@"Content-Disposition: form-data; name=\"%@\"",key];
    [bodyStr appendFormat:@"\r\n\r\n"];
    [bodyStr appendFormat:@"%@\r\n",value];
    
}

//3 pic
/*
 --AaB03x
 Content-disposition: form-data; name="pic"; filename="file"
 Content-Type: application/octet-stream
 */
[bodyStr appendFormat:@"--%@\r\n",boundary];
[bodyStr appendFormat:@"Content-disposition: form-data; name=\"pic\"; filename=\"file\""];
[bodyStr appendFormat:@"\r\n"];
[bodyStr appendFormat:@"Content-Type: application/octet-stream"];
[bodyStr appendFormat:@"\r\n\r\n"];


NSMutableData *bodyData = [NSMutableData data];

//(1)startData
NSData *startData = [bodyStr dataUsingEncoding:NSUTF8StringEncoding];
[bodyData appendData:startData];

//(2)pic
[bodyData appendData:formData];

//(3)--Str--
NSString *endStr = [NSString stringWithFormat:@"\r\n--%@--\r\n",boundary];
NSData *endData = [endStr dataUsingEncoding:NSUTF8StringEncoding];
[bodyData appendData:endData];

return bodyData;

}

+(void) getAndPostWithURL:(NSString*)urlStr
        params:(NSMutableDictionary*)params
    httpMethod:(NSString *) mothod
   headerField:(NSMutableDictionary*)headerFields
      formData:(NSData*)formData
   comPletionBlock:(CompletionBlock)block{

if ([mothod isEqualToString:@"GET"]) {
    //使用NSUrlSession
    
    //1 url
    NSString *urlString = [BaseURL stringByAppendingString:urlStr];
    
    //添加一个公共的请求头
    //    [request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];
    
    
    //@{key1:value1,key2:value2}
    //装换成字符串
    //key1=value1&key2=value2
    
    if (params == nil) {
        
        params = [NSMutableDictionary dictionary];
    }
    
    
    NSMutableString *paramStr = [NSMutableString string];
    
    for (NSString *key in params) {
        
        id value = [params objectForKey:key];
        
        NSString *keyValue = [NSString stringWithFormat:@"%@=%@&",key,value];
        
        [paramStr appendFormat:@"%@",keyValue];
        
    }
    //循环完后 paramStr:  key1=value1&key2=value2&
    
    //删除字符串最后一个字符  key1=value1&key2=value2
    [paramStr deleteCharactersInRange:NSMakeRange(paramStr.length-1, 1)];
    
    NSString *fullUrlStr = [urlString stringByAppendingFormat:@"?%@",paramStr];
    
    NSURL *url = [NSURL URLWithString:fullUrlStr];
    
    //2 request 请求( 请求体)
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120];
    //请求方式
    [request setHTTPMethod:@"GET"];
    //请求头
    [request setAllHTTPHeaderFields:headerFields];
    
    
    //3 session
    NSURLSession *session = [NSURLSession sharedSession];
    
    //4 task
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        if (error != nil) {
            
            NSLog(@"error = %@",error);
            
            return;
        }
        
        NSHTTPURLResponse *httpRes = (NSHTTPURLResponse*)response;
        
        if (httpRes.statusCode == 200) {
            
            id jsonData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
            
            //block的回调
            //作用:将新的数据显示在界面上,要回调主线程
            dispatch_async(dispatch_get_main_queue(), ^{
                
                block(jsonData);
            });
            
        }else{
            
            NSLog(@"%ld",httpRes.statusCode);
            
        }
        
    }];
    
    //5 resume
    [task resume];

}else {
    
    //使用NSUrlSession
    
    //1 url
    NSString *urlString = [BaseURL stringByAppendingString:urlStr];
    NSURL *url = [NSURL URLWithString:urlString];
    
    //2 request 请求( 请求体)
    NSMutableURLRequest *request = [NSMutableURLRequest requestWithURL:url cachePolicy:NSURLRequestUseProtocolCachePolicy timeoutInterval:120];
    //请求方式
    [request setHTTPMethod:@"POST"];
    //请求头
    [request setAllHTTPHeaderFields:headerFields];
    
    //添加一个公共的请求头
    //    [request setValue:@"gzip" forHTTPHeaderField:@"Accept-Encoding"];
    
    //重点:请求体
    if (formData ==nil) {
        
        //发微博文字 (简单数据)
        
        //@{key1:value1,key2:value2}
        //装换成字符串
        //key1=value1&key2=value2
        
        NSMutableString *paramStr = [NSMutableString string];
        
        
        for (NSString *key in params) {
            
            id value = [params objectForKey:key];
            
            NSString *keyValue = [NSString stringWithFormat:@"%@=%@&",key,value];
            
            [paramStr appendFormat:@"%@",keyValue];
            
        }
        //循环完后 paramStr:  key1=value1&key2=value2&
        
        //删除字符串最后一个字符
        [paramStr deleteCharactersInRange:NSMakeRange(paramStr.length-1, 1)];
        
        //字符串---->NSData
        NSData *bodyData = [paramStr dataUsingEncoding:NSUTF8StringEncoding];
        
        [request setHTTPBody:bodyData];
        
    }else{
        
        //发微博+图片 (有复杂数据)
        
        //(2)请求头
        //上传任务,必须要添加的字段
        NSString *contentType = [NSString stringWithFormat:@"multipart/form-data; charset=utf-8;boundary=%@",boundary];
        
        [request setValue:contentType forHTTPHeaderField:@"Content-Type"];
        
        //(3)请求体
        //[1] 文字(参数)  [2]data:(formData)
        NSData *bodydata = [self buildBodyDataWithParams:params formData:formData];
        
        [request setHTTPBody:bodydata];
        
    }       
    //3 session
    NSURLSession *session = [NSURLSession sharedSession];
    
    //4 task
    NSURLSessionDataTask *task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
        
        if (error != nil) {
            
            NSLog(@"error = %@",error);
            
            return;
        }
        
        NSHTTPURLResponse *httpRes = (NSHTTPURLResponse*)response;
        
        if (httpRes.statusCode == 200) {                
            id jsonData = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];                
            //block的回调
       //作用:将新的数据显示在界面上,要回调主线程            dispatch_async(dispatch_get_main_queue(), ^{
                
                block(jsonData);
            });                
        }else{                
            NSLog(@"%ld",httpRes.statusCode);                
        }          
    }];
    
    //5 resume
    [task resume];
}    
}
@end


#import "ViewController.h"
#import "WCDataService.h"
@interface ViewController ()
@end

@implementation ViewController
/*
 封装一个类,实现发微博(+图片)的功能.
 */

- (void)viewDidLoad {
[super viewDidLoad];
NSMutableDictionary *params = [NSMutableDictionary dictionaryWithDictionary:@{@"access_token":@"2.00fjYQRGL1iBSB1333146920fDF65B",@"status":@"我们在封装..."
 }]; //access_token是微博网页自动获取的
//使用get方法微博是写入不可用
//    [WCDataService     getWithURL:@"statuses/update.json" params:params headerField:nil comPletionBlock:^(id data) {
//    
//        NSLog(@"get:data = %@",data);
//        
//    }];

 [WCDataService         postWithURL:@"statuses/update.json" params:params headerField:nil formData:nil comPletionBlock:^(id data) {    
    NSLog(@"data = %@",data);    
    //data ----model        
    //model---->UI      
}];
}
@end

运行效果:

1.png

最后编辑于：2017.12.04 01:38:52

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iOS-网络编程之微博发说说,图片的方法封装

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