Question

数组的值是

ListArray = [[NSMutableArray alloc] init];

ListArray = [NSMutableArray arrayWithObjects:@"Google", @"Samsung", @"Twitter", @"Facebook", @"Apple", @"NiKon", nil];

当你点击selectButton

时

NSString *select = [ListArray objectAtIndex:[_picker selectedRowInComponent:0]];

NSString *title = [[NSString alloc] initWithFormat:@"Select : %@", select];

UIAlertView *alert = [[UIAlertView alloc] initWithTitle:title message:@"" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles: nil];

[alert show];

收到一个消息框。当您按OK时，我想去选择所选文件的值。

但是选择值为0。

我不知道怎么做。

Answer 1

您可以在班级中实施UIPickerViewDelegate，当用户在某个组件中选择一行时，您会收到一个事件：

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    // here you can remember the selected row or perform some action
}

不要忘记设置pickerView委托：

self.pickerView.delegate = self; // or other

Answer 2

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{

        NSString *selectedValue=[ListArray objectAtIndex:row]];
        NsLog(@"selectedValue:%@",selectedValue);
}

iOS UIPickerView如何获取所选行

2 个答案: