上傳圖片

 NSString * fileName = [[NSBundle mainBundle]pathForResource:@"廣告1" ofType:@"png"];
    ASIFormDataRequest * request = [[ASIFormDataRequest alloc]initWithURL:[NSURL URLWithString:@"http://www.qipeishop.com.cn/test.php"]];
    [request setFile:fileName forKey:@"tiImg"];
    [request buildRequestHeaders];
    [request startAsynchronous];