How to resign first responder from text field when

问题:

I have filled my view with ScrollView (same size as the view) and I'm stuck at how to resign first responder when user tap elsewhere in the View (or the scrollview). Any idea on how to do that ? I'm using the following method but it's not working as expected:

- (BOOL)textFieldShouldEndEditing:(UITextField *)textField
{
    [textField resignFirstResponder];
    return YES;
}

Thx for helping,

Stephane

回答1:

I found an answer here: link

If your ultimate aim is just to resign the first responder, this should work: [self.view endEditing:YES]

This method is designed right for it! Reference: endEditing:

Causes the view (or one of its embedded text fields) to resign the first responder status.

回答2:

For a more robust and clean solution add a tap gesture recognizer to your primary view.

This will work better with nested views and will be cleaner than secret buttons in code and UI builder.

In your view did load:

UITapGestureRecognizer* tapBackground = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(dismissKeyboard:)];
[tapBackground setNumberOfTapsRequired:1];
[self.view addGestureRecognizer:tapBackground];

..and define your target action to be triggered on tap:

-(void) dismissKeyboard:(id)sender
{
    [self.view endEditing:YES];
}

回答3:

The best option is the shortest way ;)

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    [self.view endEditing:YES];
}

回答4:

For Swift 3 and Swift 4 you can do this:

func viewDidLoad() {
    super.viewDidLoad()

    let tap: UITapGestureRecognizer = UITapGestureRecognizer(target: self, action: #selector(self.hideKeyboardByTappingOutside))

    self.view.addGestureRecognizer(tap)
}

@objc func hideKeyboardByTappingOutside() {
    self.view.endEditing(true)
}

回答5:

UIViewController inherits from UIResponder so a naive way (I am pretty sure is not the smartest way to do it) would be by overwriting the following methods (at least 1 of them)

– touchesBegan:withEvent:
– touchesMoved:withEvent:
– touchesEnded:withEvent:
- touchesCancelled:withEvent:

Next you could get the touched view by doing

UITouch *touch = [touches anyObject];
UIView *touchedView = [touch view];

finally resign the first responder if that view is not your text field

if(touchedView != textField){
    [textField resignFirstResponder];
}

_

Demerits of this approach:

You will have to handle the "tap" by yourself. (Same problem as the old iOS 3.1 or earlier). You will have to come up with your own implementation to differentiate single taps from drags, swipes, double taps, long taps, etc. Is not hard to get it working well but it is not likely you get it exactly the same way Apple detects taps (timings, distances, thresholds count!) However, that depends on your needs.

If your view structure is simple enough then you could add a gesture recognizer to the container view and resign the first responder every time the handler is called :)

Hope this helps

回答6:

    -(BOOL)textFieldShouldReturn:(UITextField *)textField
{
    [self.TextField resignFirstResponder];

    return YES;
}

回答7:

Nobody has yet presented the best answer here:

[[UIApplication sharedApplication] sendAction:@selector(resignFirstResponder) to:nil from:nil forEvent:nil];

From the documentation on this method:

Normally, this method is invoked by a UIControl object that the user has touched. The default implementation dispatches the action method to the given target object or, if no target is specified, to the first responder. Subclasses may override this method to perform special dispatching of action messages.

I bolded the relevant part of that paragraph. By specifying nil for the to: parameter, we automatically call the given selector on the first responder, wherever it is, and we don't need to have any knowledge of where in the view hierarchy it is. This can also be used to invoke other methods on the first responder as well, not just cause it to resign first responder status.

回答8:

Give a unique Tag to your UITextfield (i.e. 333), then to resign the first responder do this:

UITextField *textField = (UITextField *)[self.view viewWithTag:333];
[textField resignFirstResponder];

回答9:

Just create an IBOutlet or pointer to the text field and call [textField resignFirstResponder]; from where ever you want.

回答10:

UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc]initWithTarget:self action:@selector(TapTodissmiss)];

[self.view addGestureRecognizer:tap];

and selector

-(void)TapTodissmiss{

    [self.txtffld resignFirstResponder];

}

回答11:

When possible the best option is to make your UIView to inherit from UIButton instead.

You just need to change it in Interface Builder and immediately you will get the options to create an Action "Touch Up Inside" like any other button.

Your view will work as usual because UIButton is still a view but you will get notified when someone taps on the view. There you can call

[self.view endEditing:YES];

To resign any keyboard.

Please note that if your view is an UIScrollView this solution is not for you.

回答12:

Create your IBOutlet in ViewController.h file like below:

//YOUR ViewController.h FILE

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController
{
    //WIRE THIS WITH YOUR UITextField OBJECT AT YOUR .xib FILE
    IBOutlet UITextField *yourIBOutletUITextField;
}

@end

Add this to your ViewController.m file:

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
     [yourIBOutletUITextField resignFirstResponder];
}

like below:

//YOUR ViewController.m FILE

#import "ViewController.h"

@implementation ViewController


//ADD THIS METHOD BELOW
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event{
     [yourIBOutletUITextField resignFirstResponder];
}


- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

- (void)viewDidLoad
{
    [super viewDidLoad];
    // Do any additional setup after loading the view, typically from a nib.

    }

- (void)viewDidUnload
{
    [super viewDidUnload];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}

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

- (void)viewDidAppear:(BOOL)animated
{
    [super viewDidAppear:animated];
}

- (void)viewWillDisappear:(BOOL)animated
{
    [super viewWillDisappear:animated];
}

- (void)viewDidDisappear:(BOOL)animated
{
    [super viewDidDisappear:animated];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation != UIInterfaceOrientationPortraitUpsideDown);
}

@end

回答13:

For my implementation, [self.view endEditing:YES] did not work.

To finally make sure the keyboard was hidden, I had to make one of my views the first responder, and then immediately make it resign as per the function below:

-(void) hideKeyboardPlease{
   [uiTextTo becomeFirstResponder];
   [uiTextTo resignFirstResponder];
}

回答14:

This is what I do...

UITapGestureRecognizer *tapGesture = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(hideAllKeyboards)];
tapGesture.cancelsTouchesInView = NO;
[self.view addGestureRecognizer:tapGesture];

-(void) hideAllKeyboards {
    [textField_1 resignFirstResponder];
    [textField_2 resignFirstResponder];
    [textField_3 resignFirstResponder];
    .
    .
    .
    [textField_N resignFirstResponder];
}

回答15:

This is the easiest way iv found that works consistently. Just add a tap gesture recognizer on the view and you're good to go.

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

[self.view endEditing:YES];

}

回答16:

Update

I found another simple way

simply declare a property :-

@property( strong , nonatomic) UITextfield *currentTextfield;

and a Tap Gesture Gecognizer:-

@property (strong , nonatomic) UITapGestureRecognizer *resignTextField;

In ViewDidLoad

_currentTextfield=[[UITextField alloc]init];
_resignTextField=[[UITapGestureRecognizer alloc]initWithTarget:@selector(tapMethod:)];

[self.view addGestureRecognizer:_resignTextField];

Implement the textfield delegate method didBeginEditing

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


      _currentTextfield=textField;

    }

Implement Your Tap Gesture Method (_resignTextField)

 -(void)tapMethod:(UITapGestureRecognizer *)Gesture{

     [_currentTextfield resignFirstResponder];

 }

回答17:

Create a big button behind it all, and the button's callback calls resignFirstResponder to every input you have. Just make sure to put everything that the user interacts with on top of the button.

Of course the button will be custom rect and transparent.

I would look into implementing an IBOutletCollection called resignables and set every input to that collection. And the button callback iterates over that collection calling resignFirstResponder to them all.

Edit: if it is a re-sizable scroll view, remember to correctly set the re-size markers in the button's view option, that way the button will always expand and contract to the scrollview's height and width