iOS UIWebView加载POST请求

    NSURL *url = [NSURLURLWithString:@"http://******.html"];

    NSString *body = [NSStringstringWithFormat:@"contractCaptainName=%@&contractTeamMemberNames=%@&contractObjectName=%@&contractMandatorName=%@",@"**",@"**",@"**",@"**"];
NSMutableURLRequest *request = [[NSMutableURLRequestalloc]initWithURL: url];

    [request setHTTPMethod: @"POST"];

    [request setHTTPBody: [bodydataUsingEncoding: NSUTF8StringEncoding]];

    [_webView loadRequest: request];