How to add a line to a UITextView

vincefried · April 2011

Hi everybody!

I am currently programming on something like a peer-to-peer Chat-App. I have a textfield and a textview.


-(IBAction) sendData:(id)sender{
    
	NSString *str=mTextField.text;
	[mSession sendData:[str dataUsingEncoding: NSASCIIStringEncoding] toPeers:mPeers withDataMode:GKSendDataReliable error:nil];

}

- (void) receiveData:(NSData *)data fromPeer:(NSString *)peer inSession: (GKSession *)session context:(void *)context
{    
	NSString* aStr;
	aStr = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
	NSLog(@\"Received Data from %@\",peer);
	mTextView.text=aStr;
	
}

When I type in something in, the text of the textview appears. When I repeat that the text CHANGES. But I want to add a line. Could somebody please tell me how to do that?

vincefried

reficul · April 2011

You can try to use stringByAppendingString.

mTextview.text = [mTextview.text stringByAppendingString:aStr];

Remember to release your alloced string.

Duncan C · April 2011

vincefried;319186 said:
Hi everybody!

I am currently programming on something like a peer-to-peer Chat-App. I have a textfield and a textview.
-(IBAction) sendData:(id)sender{
    
	NSString *str=mTextField.text;
	[mSession sendData:[str dataUsingEncoding: NSASCIIStringEncoding] toPeers:mPeers withDataMode:GKSendDataReliable error:nil];

}

- (void) receiveData:(NSData *)data fromPeer:(NSString *)peer inSession: (GKSession *)session context:(void *)context
{    
	NSString* aStr;
	aStr = [[NSString alloc] initWithData:data encoding:NSASCIIStringEncoding];
	NSLog(@\"Received Data from %@\",peer);
	mTextView.text=aStr;
	
}
When I type in something in, the text of the textview appears. When I repeat that the text CHANGES. But I want to add a line. Could somebody please tell me how to do that?

vincefried

Several things:

In one part of your code you call it mTextField, and in another part you call t mTextView. Do you have two different text objects?

Are you using UITextView or UITextField objects? A UITextView is a multi-line, scrollable text object.

If you are creating UITextFields, though, I don't think they are set up to display multiple lines of text.

If you're using a UILabel (read-only) they default to a single line, but can be set up to display multiple lines. To do that set the numberOfLines property to 0.

Next, assuming you're using a UITextView, you will need to append new text to the end of the old. To get the new text to begin on a new line, you'll need to add a carriage return at the end of the old text. Something like this:

myTextView.text = [myTextView.text stringByAppendingFormat: @\"\n%@\", newText];

vincefried · April 2011

... I didn't describe it right... first you connect over peer-to-peer to another device. Then, you have a textfield and a textview. in the textfield, you type in something, and then it displays the typed text in the textview of your peer. the textview is not editable. there's a "send"-button, which is connected to the sendData-action. everytime, I press the send button, the text in the textview of my peer will be replaced by the new text, I typed in, but it should be added in a new line, just like a messenger. I hope that helped ;)

Duncan C · April 2011

vincefried;319283 said:
... I didn't describe it right... first you connect over peer-to-peer to another device. Then, you have a textfield and a textview. in the textfield, you type in something, and then it displays the typed text in the textview of your peer. the textview is not editable. there's a "send"-button, which is connected to the sendData-action. everytime, I press the send button, the text in the textview of my peer will be replaced by the new text, I typed in, but it should be added in a new line, just like a messenger. I hope that helped ;)

Ok, so take the contents of your text field and/or the response from the server and append it to the contents of the text view as I outlined in my post.

vincefried · April 2011

Yeah! It works perfectly! Thanks a lot ;)

Howdy, Stranger!

Forums

How to add a line to a UITextView

Replies