UIPicker 和键盘冲突

Question

我拥有的是 3 个文本字段，每当我触摸 textField1 或 textField2 选择器都会更改值并且没有键盘。当我触摸 textField3 键盘时，会出现键盘并且选择器会隐藏。现在，如果我通过单击“返回”关闭键盘，然后单击 textField1 选择器会再次出现，但如果我不通过单击按钮关闭键盘，它会保留在选择器上方。我需要的是当键盘是firstResponder（并且我在屏幕上看到它）时，如果我单击textField1并且只看到选择器，则将其隐藏

int variabla;

    -(void)textFieldDidBeginEditing:(UITextField *)textField{
        [pickerView setHidden:YES];
        if (textField1.editing == YES) {
            [textField1 resignFirstResponder];
            [pickerView setHidden:NO];
            variabla = 1;
        }else if (textField2.editing == YES) {  
            [textField2 resignFirstResponder];
            [pickerView setHidden:NO];
            variabla = 2;
        }   
        NSLog(@"variabla %d",variabla); 
        [pickerView reloadAllComponents];
    }

    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
    {
        return 1;
    }
    - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
    {
        if (variabla == 1) {
            return [pickerArray1 count];
        }else if (variabla == 2) {
            return [pickerArray2 count];
        }else {
            return 0;
        }   
    }
    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
    {   
        if (variabla == 1) {
            return [pickerArray1 objectAtIndex:row];        
        }else if (variabla == 2) {
            return [pickerArray2 objectAtIndex:row];
        }else {
            return 0;
        }   
    }
    - (void)textFieldShouldReturn:(UITextField *)textField{ 
        [textField resignFirstResponder];
    }
- (void)viewDidLoad {
    [super viewDidLoad];
    [pickerView setHidden:YES];
    pickerArray1 = [[NSMutableArray alloc] initWithObjects:@"0", @"1", @"2", nil];
    pickerArray2 = [[NSMutableArray alloc] initWithObjects:@"3", @"4", @"5", nil];
}

Answer 1

好的，为了解决这个问题，您可以使用很多选项，我告诉您其中之一。

- (void)textFieldShouldBeginEditing:(UITextField *)textField {

  if([textField isEqual:yourTextField3])
  {
    yourPicker.hidden=YES;
  }
  else
  {

    [yourTextField3 resignFirstResponder];
    [self performSelector:@selector(textFieldFirstResponderOnDelay) withObject:nil afterDelay:0.3];
  }
}


- (void)textFieldFirstResponderOnDelay {
  yourPicker.hidden=NO;
}

无论你想要什么，你都可以在这些条件中加入。

或者您可以在文本字段中添加标签并进行相应的检查。随时隐藏选择器或随时显示选择器并隐藏键盘。

Answer 2

  @implementation UIPickerViewController
    int variabla;
    -(void)textFieldDidBeginEditing:(UITextField *)textField {

        if([textField isEqual:textField3])
        {
            pickerView.hidden=YES;
        }
        else
        {
            pickerView.hidden=NO;
            [textField3 resignFirstResponder];
            if (textField1.editing == YES) {            
                variabla = 1;
            }else if (textField2.editing == YES) {          
                variabla = 2;
            }
            NSLog(@"variabla %d",variabla); 
            [pickerView reloadAllComponents];
        }   
    }

    - (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView;
    {
        return 1;
    }
    - (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component;
    {
        if (variabla == 1) {
            return [pickerArray1 count];
        }else if (variabla == 2) {
            return [pickerArray2 count];
        }else {
            return 0;
        }   
    }
    - (NSString *)pickerView:(UIPickerView *)pickerView titleForRow:(NSInteger)row forComponent:(NSInteger)component;
    {   
        if (variabla == 1) {
            return [pickerArray1 objectAtIndex:row];        
        }else if (variabla == 2) {
            return [pickerArray2 objectAtIndex:row];
        }else {
            return 0;
        }   
    }
    - (BOOL)textFieldShouldReturn:(UITextField
*)textField{    
        [textField resignFirstResponder];
        return YES;
    }
    - (void)viewDidLoad {
        [super viewDidLoad];
        [pickerView setHidden:YES];
        pickerArray1 = [[NSMutableArray alloc] initWithObjects:@"0", @"1", @"2", nil];
        pickerArray2 = [[NSMutableArray alloc] initWithObjects:@"3", @"4", @"5", nil];
    }

和 .h 文件

@interface UIPickerViewController : UIViewController <UIPickerViewDelegate, UIPickerViewDataSource> {

    IBOutlet UIPickerView *pickerView;
    IBOutlet UITextField *textField1;
    IBOutlet UITextField *textField2;
    IBOutlet UITextField *textField3;
    NSArray *pickerArray1;
    NSArray *pickerArray2;
    UIButton *hideKeyboardButton;

}
-(void)textFieldDidBeginEditing:(UITextField *)textField;
@end

Answer 3

明白了，谢谢您的帮助

-(void)textFieldShouldBeginEditing:(UITextField *)textField {
    pickerView.hidden=YES;
    if ([textField isEqual:textField3]) {

    }
    else if([textField isEqual:textField1])
    {
        [textField3 resignFirstResponder];
        [self performSelector:@selector(textFieldFirstResponderOnDelay1) withObject:nil afterDelay:0.1];
    }else {
        [textField3 resignFirstResponder];
        [self performSelector:@selector(textFieldFirstResponderOnDelay2) withObject:nil afterDelay:0.1];
    }
}

-(void)textFieldFirstResponderOnDelay1{ 
    pickerView.hidden=NO;
    variabla = 1;

    NSLog(@"variabla %d",variabla); 
    [pickerView reloadAllComponents];
}
-(void)textFieldFirstResponderOnDelay2{ 

    pickerView.hidden=NO;
    variabla = 2;

    NSLog(@"variabla %d",variabla); 
    [pickerView reloadAllComponents];
}

选择器必须在触摸 textField3 之前初始化