IOS如何在UIPickerView中的项目点击时关闭UIPickerView

Question

我有一个UIPickerView，当UIPickerView中选择一个项目时，我用UIToolBar和UIBarButtonItem关闭了UIPickerView。但是这不起作用，因为我发现你不能在自定义视图中执行此操作。

所以只是想问我该如何解决这个问题？

下面是代码，当我在一个自定义的UIView设立UIPickerView：在pickerView选择一个项目将是后

-(void)setupPickerView:(NSDictionary*)dic{ 

      NSDictionary *category = [dic objectForKey:@"category"]; 
      pickerViewData = [[NSMutableArray alloc] init]; 

      NSString *c_ID; 
      NSString *c_Name; 

      for(NSDictionary *dict in category) 
      { 
      if((NSNull *)[dict objectForKey:@"C_ID"] != [NSNull null]){ 

       c_ID = [dict objectForKey:@"C_ID"]; 
      } 
      if((NSNull *)[dict objectForKey:@"C_Name"] != [NSNull null]){ 
       c_Name = [dict objectForKey:@"C_Name"]; 

      } 

      [pickerViewData addObject:c_Name]; 

      } 

      pickerViewCatergory = [[UIPickerView alloc] initWithFrame:CGRectMake(0, 140, 320, 300)]; 
      pickerViewCatergory.delegate = self; 
      pickerViewCatergory.dataSource = self; 
      pickerViewCatergory.showsSelectionIndicator = YES; 
      //pickerView.hidden = YES; 
      [pickerViewCatergory setBackgroundColor:[UIColor whiteColor]]; 
      [pickerViewCatergory reloadAllComponents]; 
      [self.viewCreateThread addSubview:pickerViewCatergory]; 

     } 

Answer 1

根据您的逻辑，基本的方式来摆脱pickerView的善用UIPickerViewDelegate方法-didSelectRow:inComponent:

例子：

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component 
{ 
    //store selected row index or relevant data 
    //... 
    //then get rid of pickerView 
    [pickerView removeFromSuperview]; //simple way to just get rid of it 
}