Question

我有两个字段调用UIPickerView（国家和省份）。我正在使用inputView来显示选择器视图。两者都使用一个选择器视图，但如何根据字段填充？

这里我提供了示例代码

此代码在选择器视图事件后执行！有人建议我把这个代码放在正确的地方。

-(void)textFieldDidBeginEditing:(UITextField*)textField;
{
// Check if the field is Country
if (textField.tag == 3) {
    pickerData = [[NSMutableArray alloc] init];
    [pickerData addObject:@"Australia"];
    [pickerData addObject:@"Canada"];
    [pickerData addObject:@"India"];
    [pickerData addObject:@"China"];
    [pickerData addObject:@"United States"];
    [pickerData addObject:@"United Kingdom"];
    [pickerData addObject:@"New Zealand"];

    txtCountry.inputView = picker;
    picker.hidden = NO;
}

// Check if the field is Province
else if (textField.tag == 4) {
    if ([[txtCountry text] isEqualToString: @"Canada"]) {
        pickerData = [[NSMutableArray alloc] init];
        [pickerData addObject:@"Quebec"];
        [pickerData addObject:@"Ontario"];
        [pickerData addObject:@"British Columbia"];
        [pickerData addObject:@"Prince Evard Island"];
        [pickerData addObject:@"Alberta"];
        [pickerData addObject:@"Sascatchwan"];

        txtProvince.inputView = picker;
        picker.hidden = NO;
    }
    else {
        txtProvince.inputView = nil;
        picker.hidden = YES;
    }
}
else {
    picker.hidden = YES;
}
}

Answer 1

您是否已将其数据源设置为pickerData？

您可以调用方法[yourPickerData reloadAllComponents];

如何将数据填充到多个UIPickerView？

1 个答案: