未调用touchesBegan

Question

我使用UIPicker来填充UITextField，而不是键盘。这很好用，但是我现在不能关闭UIPicker。我希望能够在屏幕上的任何位置点击并关闭UIPicker。我已经尝试了每一种都不会触发的触摸方法。

setUserInteractionEnabled:可以。我不确定这是否有区别，但我使用的是StoryBoard

我是否应该在我的AppDelegate中设置一些东西来监听触摸？

这是我的.h

 #import <UIKit/UIKit.h>

@interface RNMemberTableViewController : UITableViewController<UIPickerViewDataSource, UIPickerViewDelegate, UITextFieldDelegate>

@property (weak, nonatomic) IBOutlet UIPickerView *behaviorPicker;
@property (nonatomic, weak) IBOutlet UIDatePicker *dateOfRecordPicker;
@property (nonatomic, strong) NSArray *behaviorLevels;
@property (weak, nonatomic) IBOutlet UITextField *behaviorTextField;

@end

下面是一些实现。

- (void)viewDidLoad
{
    [super viewDidLoad];
    [self.view setUserInteractionEnabled:YES];
    [self buildBehaviorPicker];
    NSLog(@"Member View");
}

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    NSLog(@"test");
    [self.view touchesBegan:touches withEvent:event];
    UITouch *touch = [touches anyObject];
    int tCount = touch.tapCount;
    NSLog(@"Touched %d", tCount);
}

- (void) buildBehaviorPicker
{
    behaviorLevels = [[NSArray alloc] initWithObjects:@"Unsatisfactory", @"Needs Improvement", @"Satisfactory", @"Outstanding", nil];

    UIPickerView *pickerView = [[UIPickerView alloc] init];
    pickerView.dataSource = self;
    pickerView.delegate = self;
    [pickerView selectRow:2 inComponent:0 animated:NO];
    self.behaviorTextField.inputView = pickerView;


}

预先感谢-Bob

Answer 1

您可以随时尝试以下操作：

-(void)viewDidLoad
{
    [super viewDidLoad];

    UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(tapReceived:)];
    [tapGestureRecognizer setDelegate:self];
    [self.view addGestureRecognizer:tapGestureRecognizer];
}

-(void)tapReceived:(UITapGestureRecognizer *)tapGestureRecognizer
{
    // do something, like dismiss your view controller, picker, etc., etc.
}

希望这能帮到你。

Answer 2

您可以在选取器下添加一个与控制器视图大小相同的透明按钮。

显示选取器时设置button.hidden = NO，隐藏选取器时设置button.hidden = YES。

有几种方法可以隐藏选择器。最简单的方法是设置picker.hidden = YES。

Answer 3

如果您使用的是UIScrollView，那么

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

将不会被调用，因为touchesBegan是UIView的方法而不是UIScrollView的方法。