kiransarella / mpitextkit

Powerful text framework for iOS to display rich text based on TextKit, inspired by Texture and YYText.

MPITextKit

             

Powerful text framework for iOS to display rich text based on TextKit, inspired by Texture and YYText.

Features

• UILabel API compatible
• AutoLayout supported
• Renders using TextKit, so handles all the text attributes. eg. NSAttachmentAttributeName, NSStrikethroughStyleAttributeName, NSUnderlineStyleAttributeName etc.
• High performance asynchronous text layout and rendering
• Text attachments with UIImage, UIView and CALayer
• Exclusion paths
• Custom attribute
• Custom truncation token
• Debug text layout
• Text selection

Requirements

• iOS 9+

Installation

MPITextKit supports multiple methods for installing the library in a project.

Installation with CocoaPods

pod 'MPITextKit'

Installation with Swift Package Manager

Once you have your Swift package set up, adding MPITextKit as a dependency is as easy as adding it to the dependencies value of your Package.swift.

dependencies: [
    .package(url: "https://github.com/meitu/MPITextKit.git")
]

Installation with Carthage

Carthage is a decentralized dependency manager that builds your dependencies and provides you with binary frameworks. To integrate MPITextKit, add the following to your Cartfile.

github "meitu/MPITextKit"

Usage

Basic

MPILabel *label = [MPILabel new];
label.text = @"foo";
label.font = [UIFont systemFontOfSize:16];
label.textAlignment = NSTextAlignmentCenter;
label.textVerticalAlignment = MPITextVerticalAlignmentTop;
label.textColor = [UIColor whiteColor];
label.textContainerInset = UIEdgeInsetsMake(8, 8, 8, 8);

Attributed Text

NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] initWithString:@"bar"];
    
// Append Attachment.
MPITextAttachment *attachment = [MPITextAttachment new];
attachment.content = [UIImage imageNamed:@"img"];
attachment.verticalAligment = MPITextVerticalAlignmentCenter;
NSAttributedString *attachmetText = [NSAttributedString attributedStringWithAttachment:attachment];
[text appendAttributedString:attachmetText];
    
MPILabel *label = [MPILabel new];
label.numberOfLines = 0;
label.delegate = self; /// Interact Links.

label.attributedText = attributedText;

// Truncation Token ...
label.truncationAttributedToken = MPITextDefaultTruncationAttributedToken(); 

// Additional Truncation Message.
label.additionalTruncationAttributedMessage = [[NSAttributedString alloc] initWithString:@"more" attributes:@{NSForegroundColorAttributeName: [UIColor colorWithRed:0.000 green:0.449 blue:1.000 alpha:1.000], MPITextLinkAttributeName: [MPITextLink new]}];

[label sizeToFit];
label.center = self.view.center;
[self.view addSubview:label];

Size Calculation

NSAttributedString *attributedText = [[NSAttributedString alloc] initWithString:text attributes:@{NSFontAttributeName: [UIFont preferredFontForTextStyle:UIFontTextStyleBody]}];
NSAttributedString *token = MPITextDefaultTruncationAttributedToken();
NSAttributedString *additionalMessage =
[[NSAttributedString alloc] initWithString:@"more" attributes:@{NSForegroundColorAttributeName: [UIColor colorWithRed:0.000 green:0.449 blue:1.000 alpha:1.000], MPITextLinkAttributeName: [MPITextLink new]}];
NSAttributedString *truncationAttriubtedText = MPITextTruncationAttributedTextWithTokenAndAdditionalMessage(attributedText, token, additionalMessage);
CGSize fitsSize = CGSizeMake(CGRectGetWidth(self.view.frame) - 30, CGFLOAT_MAX);
// You can change it for testing
NSUInteger numberOfLines = 5;
    
MPITextRenderAttributes *renderAttributes = [MPITextRenderAttributes new];
renderAttributes.attributedText = attributedText;
renderAttributes.truncationAttributedText = truncationAttriubtedText;
renderAttributes.maximumNumberOfLines = numberOfLines;
// Result of calculation, you can use it do something.
CGSize textSize = MPITextSuggestFrameSizeForAttributes(renderAttributes, fitsSize, UIEdgeInsetsZero);

Debug

MPITextDebugOption *debugOptions = [MPITextDebugOption new];
debugOptions.baselineColor = [[UIColor redColor] colorWithAlphaComponent:0.5];
debugOptions.lineFragmentBorderColor = [[UIColor redColor] colorWithAlphaComponent:0.200];
debugOptions.lineFragmentUsedBorderColor = [UIColor colorWithRed:0.000 green:0.463 blue:1.000 alpha:0.200];
debugOptions.glyphBorderColor = [UIColor colorWithRed:1.000 green:0.524 blue:0.000 alpha:0.200];
[MPITextDebugOption setSharedDebugOption:debugOptions];

Notice

• For multi-line text display in AutoLayout, it is recommended to set the preferredMaxLayoutWidth to improve performance.
• You should not use text and attributedText at the same time.
• When you customize attribute, you should override the - isEqual: and - hash methods.

Reference

• Texture: Smooth asynchronous user interfaces for iOS apps.
• YYText: Powerful text framework for iOS to display and edit rich text.
• STULabel: A faster and more flexible label view for iOS.
• Neat: Fix the line height problems of TextKit.
• Cocoa text system: Introduction to cocoa text system.

License

MPITextKit is released under the MIT license. See LICENSE file for details.