一、网络框架
1、ASIHttpRequest:底层用C实现，基于CFNetwork
2、AFNetwork：3.0以前基于NSURLConection,3.0以后是基于NSURLSession。
二、URL组成
协议(http/https/ftp) + IP(112.124.39.131:8081) + 接口路径(ediantong-api/apiGateway)+参数。
http://112.124.39.131:8081/ediantong-api/apiGateway?method=nepbaby.user.create&identity=13036780808&bizContent={"code":"219518","phone":"13828871001","name":"1001-店员","sex":"F","jobNumber":1001}&sign=token123456
三、网络请求
1、get网络请求
get 的URL有中文的话，需要用base64进行转码
NSString * urlStr = [NSString stringWithFormat:@"%@?versions_id=1&system_type=1",URLPath];
NSURL * url = [NSURL URLWithString:urlStr];
NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"GET"];
[request setHTTPBody:nil];
NSURLSession * session = [NSURLSession sharedSession];
//NSURLSession 创建的task挂起的
NSURLSessionDataTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSDictionary * infoDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
NSLog(@"%@",infoDict);
}];
[task resume];
2、post网络请求
NSURL * url = [NSURL URLWithString:URLPath];
NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"POST"];
NSString * postStr = @"versions_id=1&system_type=1";
[request setHTTPBody:[postStr dataUsingEncoding:NSUTF8StringEncoding]];
NSURLSession * session = [NSURLSession sharedSession];
//NSURLSession 创建的task挂起的
NSURLSessionDataTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSDictionary * infoDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
NSLog(@"%@",infoDict);
}];
[task resume];
3、使用代理形式请求数据
- (void)netLoadDelegate{
NSURL * url = [NSURL URLWithString:URLPath];
NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"POST"];
NSString * postStr = @"versions_id=1&system_type=1";
[request setHTTPBody:[postStr dataUsingEncoding:NSUTF8StringEncoding]];
//1、网络缓存的配置
//defaultSessionConfiguration，放在磁盘里面（disk），放在文件（cache）里。
//ephemeralSessionConfiguration;临时缓存，生存周期是跟随app的过程。
//后台模式
//+ (NSURLSessionConfiguration *)backgroundSessionConfigurationWithIdentifier:(NSString *)identifier;
//delegateQueue为nil是在默认队列中开启，在didReceiveData的代理方法中，打印线程，会显示子线程。
//NSURLSession 只有异步的请求
NSURLSession * session = [NSURLSession sessionWithConfiguration:[NSURLSessionConfiguration ephemeralSessionConfiguration] delegate:self delegateQueue:nil];
NSURLSessionTask * task = [session dataTaskWithRequest:request];
//开启任务
[task resume];
}
#pragma mark delegate
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveData:(NSData *)data{
}
//数据请求完成成的代理方法
- (void)URLSession:(NSURLSession *)session task:(nonnull NSURLSessionTask *)task didCompleteWithError:(nullable NSError *)error{
//如果这里的线程不是主线程，并且需要刷新界面的话，需要回到主线程去刷新UI
}
//请求头的响应 图片／视频上传 做进度条等
- (void)URLSession:(NSURLSession *)session dataTask:(NSURLSessionDataTask *)dataTask didReceiveResponse:(NSURLResponse *)response completionHandler:(void (^)(NSURLSessionResponseDisposition))completionHandler{
//在NSURLConnection中，不需要写回调，在NSURLSession中不写回调，默认是不接受数据的，
completionHandler(NSURLSessionResponseAllow);
}
4、如何使用NSURLSession做同步数据请求。
当信号量小于或者等于0是，dispatch_wait(sema, DISPATCH_TIME_FOREVER);会一直等待，直到dispatch_semaphore_signal(sema);使信号量加一为止。注：当执行dispatch_wait时信号量会减1.
- (void)getNetwork{
NSString * urlStr = [NSString stringWithFormat:@"%@?versions_id=1&system_type=1",URLPath];
NSURL * url = [NSURL URLWithString:urlStr];
NSMutableURLRequest * request = [[NSMutableURLRequest alloc] initWithURL:url];
[request setHTTPMethod:@"GET"];
[request setHTTPBody:nil];
NSURLSession * session = [NSURLSession sharedSession];
//创建一个信号量
dispatch_semaphore_t sema = dispatch_semaphore_create(0);
NSLog(@"Net ~ Begin");
//NSURLSession 创建的task挂起的
NSURLSessionDataTask * task = [session dataTaskWithRequest:request completionHandler:^(NSData * _Nullable data, NSURLResponse * _Nullable response, NSError * _Nullable error) {
NSDictionary * infoDict = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableLeaves error:nil];
NSLog(@"Net ~ ing");
dispatch_semaphore_signal(sema);
}];
[task resume];
dispatch_wait(sema, DISPATCH_TIME_FOREVER);
NSLog(@"Net ~ End");
}
