IOS URL中含有特殊字符请求失败处理

摘要：一个含有特殊字符的URL，请求失败处理，最好需要NsLog 看请求地址对编码的处理

//    三种处理网址的方法
      NSString *str1 = [@"http://118.212.144.158:8081/?code=123#/work" stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    
    NSString *str2 = CFBridgingRelease(CFURLCreateStringByAddingPercentEscapes(kCFAllocatorDefault, (CFStringRef)@"http://118.212.144.158:8081/?code=123#/work", (CFStringRef)@"!$&'()*+,-./:;=?@_~%#[]", NULL, kCFStringEncodingUTF8));

    NSString *str3 = [@"http://118.212.144.158:8081/?code=123#/work" stringByAddingPercentEncodingWithAllowedCharacters:[NSCharacterSet URLQueryAllowedCharacterSet]];
    
    [self.webV loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str2]]];
    
    NSLog(@"str1=======:%@",str1);
    NSLog(@"str2=======:%@",str2);
    NSLog(@"str3=======:%@",str3);
    
    NSLog(@"str1Request=======:%@",[NSURLRequest requestWithURL:[NSURL URLWithString:str1]]);
    NSLog(@"str2Request=======:%@",[NSURLRequest requestWithURL:[NSURL URLWithString:str2]]);
    NSLog(@"str3Request=======:%@",[NSURLRequest requestWithURL:[NSURL URLWithString:str3]]);