隐藏/显示UIPickerView [英] Hiding/ Showing UIPickerView

问题描述

我有一个touchesEnded事件，用于检查何时按下UITextField.我想要做的是隐藏/显示UIPickerView.该怎么办?

I Have an a touchesEnded event that checks for when a UITextField is pressed. What I would like it to do is is hide/show a UIPickerView. How can this be done?

- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event{
    UITouch *touch = [[event allTouches] anyObject];
    if (CGRectContainsPoint([self.textField frame], [touch locationInView:self.view]))
    {
        NSString * error = @"Touched the TextField";
        UIAlertView * errorAlert = [[UIAlertView alloc] initWithTitle:@"Selection!" message:error delegate:self cancelButtonTitle:@"OK" otherButtonTitles:nil];
        [errorAlert show];
        //Want to show or hide UIPickerView
    }
}

发生触摸时，我已经分配了UIPickerView

I already have an allocated UIPickerView when touches occur

@interface ThirdViewController : UIViewController <UITextFieldDelegate,UIPickerViewDelegate> {
    IBOutlet UIPickerView *pickerView;
}

推荐答案

UIPickerView继承自UIView，因此您应该能够只切换其"hidden"属性:

UIPickerView inherits from UIView, so you should be able to just toggle its 'hidden' property:

if (pickerView) pickerView.hidden = !pickerView.hidden;

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