问题描述

按下IBAction后决定pickerview的值

IOS应用中有UIPicker，可以检测新的选项：

代码

- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component {    NSString *aCompany = [arrayColour objectAtIndex:[pickerView selectedRowInComponent:0]];    UIAlertView *alert = [[UIAlertView alloc]                          initWithTitle:@""Picked:""                          message:aCompany                          delegate:nil                          cancelButtonTitle:@""Okay""                          otherButtonTitles:nil];    [alert show];}

怎么能在按下一个按钮之后，获取最新的状态？

- (IBAction)DoneButton:(id)sender {    UIAlertView *alert = [[UIAlertView alloc]                          initWithTitle:@""Picked:""                          message:aCompany                          delegate:nil                          cancelButtonTitle:@""Okay""                          otherButtonTitles:nil];    [alert show];}

解决方案

当滚动UIPickerView时，在UIPickerView触发事件中：- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component记录下当前的row的值，按下一个按钮之后，获取最新的状态时到你的数组中去取：[arrayColour objectAtIndex:row]