获取选定的选择器视图组件字符串值

Question

I have a picker view and it has four components. I have created a label that is displayed. I have a two array populating the first component (component 0) label text, and the last component (component 3) label text. For the center two components, I have the label text set like this

label.text = [NSString stringWithFormat:@"%d", row]; .

NOTE: this is in the viewForRow: method. I have a button below it that I want to get selected data from each component. How can I get the string value of the selected center two components?

I know how to get the two with arrays but I'm unsure how to get the selected label text. Forgive me if there's some very simple answer I have just missed or overlooked.

Answer 1

You should implement the delegate method, pickerView:didSelectRow:inComponent:, which will give you the row and component that was selected. You can use that information to access the correct index in the appropriate array.

Answer 2

UIPickerView has a " selectedRowInComponent: " method which can help you. You can get some reference from this link too-

Answer 3

- (void)pickerView: (UIPickerView *) pickerView didSelectRow: (NSInteger)row inComponent: (NSInteger) component {
    rowValue = row;
}

just keep the row index in global attribute then get the value like this

NSStrin *string=[NSString stringWithFormat:@"%d", rowValue]; 

Answer 4

On selecting the button just get the current picker selected row

NSInteger row = [yourPicker selectedRowInComponent:0];
//Choose it for other components
NSString *yourComponentValue  = [yourArray objectAtIndex:row];

Or

 - (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
   NSString *yourComponentValue = [NSString stringWithFormat:@"%d",[yourarray objectAtIndex:row];
   //Imagine this method will be called whenever the user scrolls. Usability point-of-view i would suggest not to update any of your UI here
}

This UPicker delegate method will be called when the user scrolls the picker and the scrolling is finished.

Choose where and when you want it to be