同步POST请求

创建POST请求

1 根据网址初始化OC字符串对象
    NSString * urlString = [NSString stringWithFormat:@"%@",kVideoURL];

2 创建URL对象
    NSURL * url = [NSURL URLWithString:urlString];

3 创建请求
    NSMutableURLRequest * requrst = [NSMutableURLRequest requestWithURL:url];

4 创建参数字符串对象
    NSString * parmStr = [NSString stringWithFormat:@"%@",@"method=album.channel.get&appKey=myKey&format=json&channel=t&pageNo=1&pageSize=10"];

5 将字符串转为NSDATA 对象
    NSData * parmData = [parmStr dataUsingEncoding:NSUTF8StringEncoding];

6 设置请求体
    [requrst setHTTPBody:parmData];

7 设置请求方式
    [requrst setHTTPMethod:@"POST"];

创建同步连接
    NSData * data = [NSURLConnection sendSynchronousRequest:requrst returningResponse:nil error:nil];
    
 解析
    NSDictionary * dic = [NSJSONSerialization JSONObjectWithData:data options:NSJSONReadingMutableContainers error:nil];
    NSLog(@"%@",dic);