IPInsetLabel: a simple UILabel subclass that adds padding insets and auto-height-resizing

IPInsetLabel.h

//
//  IPInsetLabel.h
//  Instapaper
//
//  Created by Marco Arment on 7/23/11.
//  Copyright 2011 Instapaper LLC, released to the public domain.
//

#import <UIKit/UIKit.h>

@interface IPInsetLabel : UILabel
@property (nonatomic, assign) UIEdgeInsets insets;
- (void)resizeHeightToFitText;
@end

IPInsetLabel.m

//
//  IPInsetLabel.m
//  Instapaper
//
//  Created by Marco Arment on 7/23/11.
//  Copyright 2011 Instapaper LLC, released to the public domain.
//

#import "IPInsetLabel.h"

@implementation IPInsetLabel
@synthesize insets;

- (void)drawTextInRect:(CGRect)rect 
{
    return [super drawTextInRect:UIEdgeInsetsInsetRect(rect, self.insets)];
}

- (void)resizeHeightToFitText
{
    CGRect frame = [self bounds];
    CGFloat textWidth = frame.size.width - (self.insets.left + self.insets.right);

    CGSize newSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(textWidth, 1000000) lineBreakMode:self.lineBreakMode];
    frame.size.height = newSize.height + self.insets.top + self.insets.bottom;
    self.frame = frame;
}

@end

This is a great method, Marco!

Perhaps one suggestion: setting the frame to the instance's bounds prevents explicit instructions for points of origin. This seems to work well if you need to pass in origins in initWithFrame:

self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, frame.size.width, frame.size.height);

+1

Useful class ! Thanks

I have done a small change in order to keep the original origin ( so that the label doesn't move from place when the method is used )

• (void)resizeHeightToFitText
  {

  //save initial origin position
  CGPoint origin = self.frame.origin;

  CGRect frame = [self bounds];
  CGFloat textWidth = frame.size.width - (self.insets.left + self.insets.right);

  CGSize newSize = [self.text sizeWithFont:self.font constrainedToSize:CGSizeMake(textWidth, 1000000) lineBreakMode:self.lineBreakMode];
  frame.size.height = newSize.height + self.insets.top + self.insets.bottom;

  frame.origin = origin;
  self.frame = frame;
  }

Thanks is very useful class :)

Looks like this class needs an update for iOS 7. Xcode is dumping out a warning about the use of a deprecated method:

IPInsetLabel.m:24:33: 'sizeWithFont:constrainedToSize:lineBreakMode:' is deprecated: first deprecated in iOS 7.0 - Use -boundingRectWithSize:options:attributes:context:

Here's the update for the iOS 7 deprecation noted by @bomalley. I've also included the origin fix by @jeebster:

- (void)resizeHeightToFitText {
    CGRect frame = [self bounds];
    CGFloat textWidth = frame.size.width - (self.insets.left + self.insets.right);

    CGRect newSize = [self.text boundingRectWithSize:CGSizeMake(textWidth, CGFLOAT_MAX) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName : self.font} context:nil];

    frame.size.height = newSize.size.height + self.insets.top + self.insets.bottom;
    self.frame = CGRectMake(self.frame.origin.x, self.frame.origin.y, frame.size.width, frame.size.height);
}

Thanks all for your work! I just pushed a CocoaPod out for this code up to @danomatika's fixes, with additions from @soffes/SAMLabel. It can be found at @doublerebel/IPInsetLabel or on Cocoapods as IPInsetLabel. Hope to see this lib continue, glad to accept any PRs!