ASIHttpRequest框架使用说明-----post请求 以及监听网络

1.导入头文件  
#import " ASIFormDataRequest.h"
 
2.创建一个 ASIFormDataRequest 对象
ASIFormDataRequest *formRequest = [[ASIFormDataRequest alloc] initWithURL:[NSURL URLWithString:UrlStr]];
 
3.设置代理
formRequest.delegate = self;
 
4.设置请求体  下面相当于 q=武侠
[formRequest addPostValue:@"武侠" forKey:@"q"];
 
5.发送请求
[formRequest startAsynchronous];
 
6.实现代理方法
1)遵守协议 ASIHTTPRequestDelegate
2)实现协议方法 
- (void)requestFinished:(ASIHTTPRequest *)request    请求完成的时候调用
request.responseString  取字符串
request.responseData   取data数据
 
 
- (void)requestFailed:(ASIHTTPRequest *)request  请求出错时调用
与get请求的区别就是  
1.包含头文件不同
2.创建的request对象不同
3.要设置请求体
 
监听网络
1. //监听网络状态的变化
    [[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(onNetWorkChanged:) name:kReachabilityChangedNotification object:nil];
    Reachability *reach = [Reachability reachabilityWithHostName:@"www.baidu.com"];
    [reach startNotifier];//开始检测网络状态
2.
- (void)onNetWorkChanged:(NSNotification *)notification
{
    Reachability *oneReach = [notification object];
    if (oneReach.isReachable) {
        NSLog(@"network can reach");
    }else {
        NSLog(@"network canot reach");
    }
}
原文地址:https://www.cnblogs.com/bing-ge/p/4615954.html