Arrays 使用目标C将子字符串替换为字符串

我正在尝试用现有的URL IP地址替换我的自定义IP地址。如何用现有IP替换我的IP地址。请在下面找到代码片段

 - (IBAction)btnSubmit:(UIButton *)sender {

        NSString *ipAdd = [_txtIPAddress text];
        NSLog(@"My entered IP Address is %@", ipAdd);

        NSLog(@"Current pointing server value is %@", [ConnManager activeEndpoint]);

        NSLog([App appDelegate].isConfigured  ? @"Yes" : @"No");

        NSArray *listItems = [[ConnManager activeEndpoint] componentsSeparatedByString:@"/"];

        ConnManager *conn = [[ConnManager alloc] init];

        NSMutableString *configuredUrl = nil;
        [configuredUrl setString:@""];

        for ( NSInteger i =0; i < listItems.count; i++) {
            if(i != 2) {
                NSMutableString * arrayElement = [(NSMutableString*)listItems objectAtIndex:i];
                NSMutableString *str = [NSMutableString stringWithFormat: @"%@/", arrayElement];
                [configuredUrl appendString:str];
            } else {
                NSMutableString *configstr = [NSMutableString stringWithFormat: @"%@", ipAdd];

                NSLog(@"ConfigString %@", configstr);


//How to replace the my ip address with the array index[2]
 configuredUrl = [configuredUrl stringByAppendingFormat:configstr];
            NSLog(@"Configured Url after apppending %@", configuredUrl);

-（iAction）btnSubmit:（UIButton*）发送方{
NSString*ipAdd=[\u txtIPAddress text]；
NSLog（@“我输入的IP地址为%@”，ipAdd）；
NSLog（@“当前定点服务器值为%@”，[ConnManager activeEndpoint]）；
NSLog（[App appDelegate].isConfigured？@“是”：@“否”）；
NSArray*listItems=[[ConnManager activeEndpoint]组件通过字符串分离：@/“]；
ConnManager*conn=[[ConnManager alloc]init]；
NSMutableString*configuredUrl=nil；
[configuredUrl设置字符串：@”“；
对于（NSInteger i=0；i

---

提前感谢

试试这个较短的版本，它取代了行后的所有内容

NSLog（[App appDelegate].isConfigured？@“Yes”：@“No”）；

或者，如果

activeEndpoint

是一个URL，则更容易

 NSURL *url = [NSURL URLWithString:[ConnManager activeEndpoint]];
 NSString *configuredURL = [[[NSURL alloc] initWithScheme:[url scheme] host:ipAdd path:[url path]] absoluteString];

---

将URL解析留给系统类通常更容易。如果可以，我建议使用

NSURLComponents

。例如：

NSURLComponents *URLComponents = 
     [NSURLComponents componentsWithString:[ConnManager activeEndpoint]];
URLComponents.host = [_txtIPAddress text];
NSString *configuredURL = URLComponents.string;

---

非常感谢。它可以工作，但我得到的URL是http:/xx.x.xxx.xx/xx/xx。如何在http之后再插入一个斜杠：

NSURLComponents *URLComponents = 
     [NSURLComponents componentsWithString:[ConnManager activeEndpoint]];
URLComponents.host = [_txtIPAddress text];
NSString *configuredURL = URLComponents.string;