ios - 如果用户在其他地方单击然后 UIPickerView，如何使 UIPickerView resignFirstResponder

Question

我创建了 UIPickerView 如下。现在我想让它 resignFirstResponder 如果用户在其他地方点击然后 UIPickerView 我怎么能实现呢。我已经按照以下方式创建了 UIPickerView。我还能在哪里处理

[pickerView removeFromSuperview];

-(void)pickerview:(id)sender
{
    _items =[[NSArray alloc]initWithObjects:@"Hindi",@"English",@"In what city were you born?",
             @"What was your childhood nickname?",
             @"Type your own question.",nil];

    pickerView=[[UIPickerView alloc] initWithFrame:CGRectMake(10,350,300,300)];

    pickerView.transform = CGAffineTransformMakeScale(0.75f, 0.75f);
    pickerView.delegate = self;
    pickerView.dataSource = self;
    pickerView.showsSelectionIndicator = YES;
    pickerView.backgroundColor = [UIColor lightGrayColor];
    [pickerView selectRow:1 inComponent:0 animated:YES];
  //  [self.view addSubview:pickerView];
    [contentView addSubview:pickerView];


}

- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
{

    return 1;

}

- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
{

    return [_items count];
}

- (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component
{
        return[_items objectAtIndex:row];

}

-(void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component{
    [Txt_SecurityQue setText:[_items objectAtIndex:row]];
     NSLog(@"Did select");
}

Answer 1

-(void)viewWillAppear:(BOOL)animated
{
    [super viewWillAppear:YES];

    UITapGestureRecognizer *tap=[[UITapGestureRecognizer          
     alloc]initWithTarget:self action:@selector(Tap)];
    [contentView addGestureRecognizer:tap];
}

-(void)Tap {

   //write the UIPickerView resignFirstResponder code......
}