需要双击而不是单击的键盘

Question

我不想在文本框上单击显示键盘，而是想要双击显示它。 为此，我创建了两个动作，一个是单一的水龙头及其他的双击，也使用文本框的委托方法：

  [textField1 addTarget:self action:@selector(clicked) forControlEvents:UIControlEventTouchDownRepeat]; // for double tap 
      [textField1 addTarget:self action:@selector(clicked1) forControlEvents:UIControlEventTouchDown]; // for single tap 

METHOD DEFINATION: 

-(void)clicked // action for double tap 
{ 
    count=2; 
    NSLog(@"--------double------%d",count); 
    [textField1 becomeFirstResponder]; 
} 

-(void)clicked1 //action for single tap 

{ 
    count=1; 
} 

-(BOOL)textFieldShouldBeginEditing:(UITextField *)textField //textfield delegate 
{ 
if(count==1) 
    return NO; 
else 
    return YES; 
} 

此代码工作正常，但并非总是如此。有时未检测到“UIControlEventTouchDownDownRepeat”事件，并且“单击”功能不起作用。 我无法理解这个原因，为什么这个事件不是每次都有效。

Answer 1

嗨，你可以试试这个。

//Tap GestureRecognizer to recognize tap 
    UITapGestureRecognizer *doubleTap = [[UITapGestureRecognizer alloc] initWithTarget: self action:@selector(youMethodName)]; 
     doubleTap.numberOfTapsRequired = 2; 
     [self.view addGestureRecognizer:doubleTap]; 

//使用yourMethodName显示键盘

Answer 2

不要添加任何行动文本框 做类似下面

@interface ViewController()<UIScrollViewDelegate,UITextFieldDelegate> 
    { 
     int count; 
    } 

- (void)viewDidLoad 
    { 
    count = 0;//initially put zero 
    self.textField.delegate = self; //textfield added in xib or story board 

    } 

    - (BOOL)textFieldShouldBeginEditing:(UITextField *)textField 
    { 
     count++; 
     if(count == 2) 
     { 
     count = 0; 
     return YES; 
     } 

    if(count >= 2) 
    count = 0; 
    return NO; 

} 

//for testing i am doing like this 
- (BOOL)textFieldShouldReturn:(UITextField *)textField 
    { 
    [textField resignFirstResponder]; 
    return YES; 
    }