Ios 选择下拉选择器时如何获取数组索引值

我已经按照这个步骤安装了下行选择器。选择项时，我需要获取NSMutableArray索引值。背后的原因是我有2个数组。一个代表国家，一个代表代码。当用户选择国家时，我需要获取索引值以获取代码。非常感谢您的帮助

- (void)viewDidLoad
{
    [super viewDidLoad];

    //=== Initiallize the Mutable Array
    countryMArray = [[NSMutableArray alloc] init];
    codeMArray = [[NSMutableArray alloc] init];

    //=== Initialize the responseData Mutable Data
    self.responseData = [NSMutableData data];

    //=== Pass the string to web and get the return Country response.write
    appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];
    sURL = appDelegate.gURL;
    sURL = [sURL stringByAppendingString:@"/apps/getcountry.asp?"];

    NSURLRequest *requestCountry = [NSURLRequest requestWithURL:[NSURL URLWithString:sURL]];

    (void) [[NSURLConnection alloc] initWithRequest:requestCountry delegate:self];

    //=== Pass the string to web and get the return Code response.write
    sURL = appDelegate.gURL;
    sURL = [sURL stringByAppendingString:@"/apps/getctcode.asp?"];

    NSURLRequest *requestCode = [NSURLRequest requestWithURL:[NSURL URLWithString:sURL]];

    (void) [[NSURLConnection alloc] initWithRequest:requestCode delegate:self];

    self.pickerCountry = [[DownPicker alloc] initWithTextField:self.txtCountry withData:countryMArray];

---

}当用户滚动时，添加目标。您将在所需的方法中获得回调，如下所示：

[self.pickerCountry addTarget:self 
    action:@selector(dp_Selected:)
    forControlEvents:UIControlEventValueChanged];


-(void)dp_Selected:(id)dp {
    NSString* selectedValue = [self.pickerCountry text];
    // do what you want
    //search the text to get index value
}

官方链接：

---

在

viewDidLoad

中将目标添加到

pickerCountry

 [self.pickerCountry addTarget:self 
  action:@selector(pickerClicked:)
   forControlEvents:UIControlEventValueChanged];

//

-（无效）选择器点击：（id）dp{
NSString*selectedValue=[self.pickerCountry text]；
for（int i=0；i

-(void)pickerClicked:(id)dp {

     NSString* selectedValue = [self.pickerCountry text];

       for ( int i = 0 ; i < countryMArray.count; i++) {

         NSString*item = [countryMArray objectAtIndex:i];

         if([item isEqualToString:selectedValue])
         {
             [self.pickerCode selectRow:i inComponent:0 animated:YES];

             break;
        }

    }
}