UIButton addTarget不适用于iOS7，但可在IOS6中使用

Question

Obviously, this code works in iOS 6. By the way, it has problem in iOS 7.

I add UIButton to every row in a UIPickerView:

- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view
{
    UIButton *btnRow=[UIButton buttonWithType:UIButtonTypeSystem];
    [btnRow addTarget:self action:@selector(touch:) forControlEvents:UIControlEventTouchUpInside];
    btnRow.frame=CGRectMake(0, 0, 320, 30);
    int tag= selfTextField.tag/10000 - 1;
    [btnRow setTitle:[[pickerArray objectAtIndex:tag] objectAtIndex:row] forState:UIControlStateNormal];

    return btnRow;
}

Answer 1

You can't place a button on picker view row. So i have added a toolbar above UIPickerView and added a bar button item on it. I use the row number to perform desired functionality through selector

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component
{
     ....
     //get the row number & Perform desired functionality
     ....
}

you will get the row number and use that to perform desired functionality.