以编程方式调用didSelectRow？

Question

正如标题所说，有没有办法在pickerview中调用didSelectrow？我正在研究我的第一个“大”项目（货币转换器），这是一个我似乎无法弄清楚的问题。这是从.m文件中获取的一些代码：

//Toggle reverse on/off
- (IBAction)Reverse:(id)sender {
    reverse = (reverse+1)%2;
    NSString *tmpstring = string1;
    string1 = string2;
    string2 = tmpstring;

    if (!reverse) {
        [Picker1 selectRow:row2 inComponent:0 animated:YES];
        [Picker1 selectRow:row1 inComponent:1 animated:YES];
        Text1.text = [Datarray objectAtIndex:row2];
    } else {
        [Picker1 selectRow:row1 inComponent:0 animated:YES];
        [Picker1 selectRow:row2 inComponent:1 animated:YES];
          Text1.text = [Datarray objectAtIndex:row1];
    }
    tmpstring = nil;
    [self Editingdidend:self];
    NSLog(@"%d",reverse);
    //[call didSelectRow here]
}

-(void) pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    XMLparse *parse = [[XMLparse alloc]init];
    if (component == 0) {
    Text1.text = [Datarray objectAtIndex:row];
        string1 = [Datarray objectAtIndex:row];
        row1 = row;
        [parse setHowmuchmoney:[Inputter.text floatValue]];
        [parse setValutanamn1:string1];
        [parse setValutanamn2:string2];
        [parse loadDataFromXML];
        Output.text = [NSString stringWithFormat:@"%.2f", [parse convertionrate]];
    } else {
        string2 = [Datarray objectAtIndex:row];
        row2 = row;
        [parse setHowmuchmoney:[Inputter.text floatValue]];
        [parse setValutanamn1:string1];
        [parse setValutanamn2:string2];
        [parse loadDataFromXML];
        Output.text = [NSString stringWithFormat:@"%.2f", [parse convertionrate]];
    }
}