iOS How to handle keyboard events

[drf1229]

I am making a program that requires the user to submit some input. I have a submit button, three text fields, and an IBAction. How do I make the action run when the user presses enter on the keyboard? Any help will do, I'm a beginner at iphone development.

 

[dejo]

So you want to user to be able to use the Submit button or enter on the keyboard to perform the same action?

 

[drf1229]

Yes, but I have no idea how to do that. I also want the keyboard to hide when the action starts. (I'm still working on the same project as the last post btw)

 

[dejo]

Yes, but I have no idea how to do that. I also want the keyboard to hide when the action starts. (I'm still working on the same project as the last post btw)

I believe you'll need to do these things programatically (vs. thru IB). Look into using resignFirstResponder to hide the keyboard. The same place you do that, you probably can also call your IBAction method.

 

[drf1229]

Ok, i'll take a look, thanks

 

[drf1229]

Actually, I'm still a bit confused...
I did this:

[C resignFirstResponder]

But that does nothing... What exactly does resignFirstResponder do?

 

[dejo]

What exactly does resignFirstResponder do?

Here's an opportunity to learn from documentation as well as what others have discovered. I.E. the answer is out there...

 

[isharan]

Actually, I'm still a bit confused...
I did this:

[C resignFirstResponder]

But that does nothing... What exactly does resignFirstResponder do?

resignFirstResponder resigns the first responder status of the text field, making the keyboard disappear.

 

[drf1229]

It doesn't do that in my code

 

[dejo]

It doesn't do that in my code

Where did you put your resignFirstResponder? That's key.

 

[drf1229]

//
//  ViewController.m
//  PercentFinder
//
//  Created by Danny Flax on 6/21/09.
//  Copyright 2009 __MyCompanyName__. All rights reserved.
//

#import "ViewController.h"
#import <stdio.h>
#import "PercentFinderAppDelegate.h"
@implementation MyViewController
@synthesize C;







-(IBAction)Solve:(UIButton*)sender{
	
	[C resignFirstResponder];
	
		NSString*as=[A text];
	float a=[as intValue];
	NSString*bs=[B text];
	float b=[bs intValue];
	NSString*cs=[C text];
	float c=[cs intValue];
	float d=((-1*b)+sqrt((b*b)-4*(a*c)))/(2*a);
	float e=((-1*b)-sqrt((b*b)-4*(a*c)))/(2*a);
	printf("%f and %f\n",d,e);
	 
	
	[Answer setText:[NSString stringWithFormat:@"%f and %f",d,e]];
		
		

	
	
	
}


@end

 

[drf1229]

Guess what, I googled, and I figured it out! I now know how to execute events when enter is pressed on the keyboard. Thank you for your help still! I have one more question though. How do I shift focus from one textfield to another? In other words, when somebody presses enter in the A textfield, I want the focus to go to B, and so on.

 

[isharan]

Guess what, I googled, and I figured it out! I now know how to execute events when enter is pressed on the keyboard. Thank you for your help still! I have one more question though. How do I shift focus from one textfield to another? In other words, when somebody presses enter in the A textfield, I want the focus to go to B, and so on.

Make the next textfield become the firstResponder. Anytime a textfield is firstResponder, the keyboard will appear.

 

[drf1229]

And how would I do that?

 

[isharan]

And how would I do that?

Should be in the documentation...somewhere along the lines of makeFirstResponder

 

[drf1229]

I can't find it in the documentation

 

[dejo]

UIResponder. (Which is the superclass of UIView which is superclass to UIControl which is superclass to UITextField.)