UIPickerView 修改必须滚动才修改值的bug

//相应的选择转动
- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {
    if (component == 1) {
        hour_start = [hour_array[row] integerValue];
        NSInteger row = [pickerView selectedRowInComponent:2];
        minute_start = [minute_array[row] integerValue];
    } else if (component == 2) {
        minute_start = [minute_array[row] integerValue];
        NSInteger row = [pickerView selectedRowInComponent:1];
        hour_start = [hour_array[row] integerValue];
    }
    if (selectRow == 0) {
        startTime[0] = [NSString stringWithFormat:@"%02d:%02d", hour_start, minute_start];
    } else if (selectRow == 1) {
        startTime[1] = [NSString stringWithFormat:@"%02d:%02d", hour_start, minute_start];
    } else {
        startTime[2] = [NSString stringWithFormat:@"%02d:%02d", hour_start, minute_start];
    }

}