CODEWITHSUNDEEP
iosobjective-cuilabeluitextview
Muhammad Uzair Arshad
Muhammad Uzair Arshad

Reputation: 1549

UILabel auto resize on basis of text to be shown

I'm working on an application, in which I'm required to autoresize the text area on basis of text to be displayed.

Firstly, I'm not sure for this either I should use UILabel (Logically is the best choice for displaying static text, which is in my case) or UITextView.

How I wish to use it?
I want to simply init my Label or text view for that matter with Text. Instead I define the frame first and then restrict my text in that area.

If you can suggest the right solution, that will be a great help.

I went through documentation and other references but didn't find much which could help me here or I could've overlooked it.

Upvotes: 55

Views: 93892

Answers (10)

Sakshi Sharma iOS Developer
Sakshi Sharma iOS Developer

Reputation: 63

You can change the size of label based on length of the string by, using this function

func ChangeSizeOfLabel(text:String) -> CGSize{

    let font = UIFont(name: "HelveticaNeue", size: 12)!
    let textAttributes = [NSFontAttributeName: font]
    let size = text.boundingRectWithSize(CGSizeMake(310, 999), options: .UsesLineFragmentOrigin, attributes: textAttributes, context: nil)
    let adjustSize = CGSizeMake(size.width, size.height)
    return adjustSize
}

and use it like this :

let 

showLabel.frame = CGRectMake(x, y, width , self.ChangeSizeOfLabel("Hello , Height is changing dynamically.....").height)

Upvotes: 0

Berik
Berik

Reputation: 8143

If you want to resize the UILabel only in height, use this:

@property (nonatomic, weak) IBOutlet UILabel *titleLabel;

CGRect titleLabelBounds = self.titleLabel.bounds;
titleLabelBounds.size.height = CGFLOAT_MAX;
// Change limitedToNumberOfLines to your preferred limit (0 for no limit)
CGRect minimumTextRect = [self.titleLabel textRectForBounds:titleLabelBounds limitedToNumberOfLines:2];

CGFloat titleLabelHeightDelta = minimumTextRect.size.height - self.titleLabel.frame.size.height;
CGRect titleFrame = self.titleLabel.frame;
titleFrame.size.height += titleLabelHeightDelta;
self.titleLabel.frame = titleFrame;

Now you can use titleLabelHeightDelta to layout other views depending on your label size (without using autolayout).

Upvotes: 9

Patel Jigar
Patel Jigar

Reputation: 2151

try bellow code, it works for multiline

self.labelText.text = string;
self.labelText.lineBreakMode = NSLineBreakByWordWrapping;
self.labelText.numberOfLines = 0;

Upvotes: 0

Alex
Alex

Reputation: 425

Because you're going to use this solution countless times in your app, do the following:

1) Create a directory called extensions and add a new file inside called UILabel.swift with the following code:

import UIKit

extension UILabel {
    func resizeToText() {
        self.numberOfLines = 0
        self.sizeToFit()
    }
}

2) In your app code, define the label width you want and just call resizeToText():

label.frame.size.width = labelWidth
label.resizeToText()

This will maintain width while increasing the height automatically.

Upvotes: 2

Segev
Segev

Reputation: 1287

In Swift:

testLabel = UILabel(frame: CGRectMake(6, 3, 262, 20))
testLabel.text = test
testLabel.numberOfLines = 0
testLabel.sizeToFit()

In Objective C

UILabel *testLabel = [[UILabel alloc] initWithFrame: CGRectMake(6, 3, 262, 20)]];
testLabel.text = test;
testLabel.numberOfLines = 0;
[testLabel sizeToFit];

Upvotes: 15

Ilja Popov
Ilja Popov

Reputation: 1141

Please note that with autolayout call sizeToFit won't change size, because it will be changed later by autolayout calculations. In this case you need to setup proper height constraint for your UILabel with "height >= xx" value.

Upvotes: 2

Anand
Anand

Reputation: 1973

The easiest way to find the no. of lines depending on text. You can use this code:

ceil(([aText sizeWithFont:aFont].width)/self.bounds.size.width-300);

it returns some float value.

[lbl setNumberOfLines:floatvalue];

Upvotes: 6

Muhammad Uzair Arshad
Muhammad Uzair Arshad

Reputation: 1549

The sizeToFit method worked just great.

I did following.

UILabel *testLabel =[[UILabel alloc] initWithFrame:CGRectMake(6,3, 262,20 )]; // RectMake(xPos,yPos,Max Width I want, is just a container value);

NSString * test=@"this is test this is test inthis is test ininthis is test inthis is test inthis is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...this is test in uilabel ...";

testLabel.text = test;
testLabel.numberOfLines = 0; //will wrap text in new line
[testLabel sizeToFit];

[self.view addSubview:testLabel];

Upvotes: 97

Erik Tjernlund
Erik Tjernlund

Reputation: 1983

I'm not sure I totally understand the question, but you can use the sizeToFit method on a UILabel (the method is inherited from UIView) to change the size according to the label text.

Upvotes: 6

j_freyre
j_freyre

Reputation: 4738

You can find a text size with :

CGSize textSize = [[myObject getALongText] 
                    sizeWithFont:[UIFont boldSystemFontOfSize:15] 
                    constrainedToSize:CGSizeMake(maxWidth, 2000)
                    lineBreakMode:UILineBreakModeWordWrap];

then you can create your UILabel like that :

UILabel * lbl = [[UILabel alloc] initWithFrame:CGRectMake(0,0,textSize.width, textSize.height];
[lbl setNumberOfLines:0];
[lbl setLineBreakMode:UILineBreakModeWordWrap];
[lbl setText:[myObject getALongText]];

Upvotes: 29

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