说明：旨在减少对第三方的依赖，一个比较简单的实现思路；比起像YYLabel等强大的框架只是冰山一角！重在学习☺️☺️(swift和objectC都有提供哦)
废话不都说直接上代码 （git的demo，点击下载）
我就写一下swift的具体代码，OC的就不啰嗦啦
在控制器的实现代码，很随意
//
// ViewController.swift
// KVAttributedString
//
// Created by 李康卫 on 16/11/8.
// Copyright © 2016年 李康卫. All rights reserved.
//
import UIKit
class ViewController: UIViewController {
override func viewDidLoad() {
super.viewDidLoad()
//设置UI
setupUI()
// testLabel.attributedText = NSMutableAttributedString.init(imageName: "compose_mentionbutton_background_highlighted", contentString: "helloMISSBodyMeimi", attributedInsertType: KVAttributedInsertType.First, label: testLabel)
// testLabel.attributedText = NSMutableAttributedString.init(content: "还是短发hi阿萨[微笑]防守打法看见就看发的啥看法", color: UIColor.redColor(), colorString: "见就看发的")
let nsStr = "还是短发hi阿萨[微笑]防守打法看见就看发的啥看法还是短发hi阿萨[微笑]防守打法看见就看发的啥看法还是短发hi阿萨[微笑]防守打法看见就看发的啥看法" as NSString
testLabel.attributedText = nsStr.emojiAttributedString()
}
//布局label
private func setupUI() {
self.view.addSubview(testLabel)
testLabel.translatesAutoresizingMaskIntoConstraints = false
self.view.addConstraint(NSLayoutConstraint(item: testLabel, attribute: NSLayoutAttribute.Top, relatedBy: .Equal, toItem: self.view, attribute: NSLayoutAttribute.Top, multiplier: 1, constant:50))
self.view.addConstraint(NSLayoutConstraint(item: testLabel, attribute: NSLayoutAttribute.Leading, relatedBy: .Equal, toItem: self.view, attribute: NSLayoutAttribute.Top, multiplier: 1, constant: 50))
self.view.addConstraint(NSLayoutConstraint(item: testLabel, attribute: NSLayoutAttribute.Trailing, relatedBy: .Equal, toItem: self.view, attribute: NSLayoutAttribute.Trailing, multiplier: 1, constant: -50))
}
//懒加载
private lazy var testLabel: UILabel = {
let label = UILabel()
label.text = "holleWrod"
label.textColor = UIColor.cyanColor()
label.numberOfLines = 0
return label;
}()
}
每种方法对应的效果如图所示
convenience init(imageName: String,contentString: String ,attributedInsertType: (KVAttributedInsertType),label: UILabel)
593027BF-5D58-4C80-987F-591A86E22E3A.png
BE006998-D85F-49EB-B50A-D9685EECE58A.png
convenience init(content: String,color: UIColor,colorString: String)
7CFB5F48-1107-4DCE-98C0-3E87D5A93618.png
func emojiAttributedString() ->NSMutableAttributedString
375358A0-8D90-4FC4-AA57-F14C0327B2D6.png
核心代码：
import UIKit
public enum KVAttributedInsertType : Int {
case First
case last
}
extension NSMutableAttributedString {
///文本前后插入图片
convenience init(imageName: String,contentString: String ,attributedInsertType: (KVAttributedInsertType),label: UILabel){
self.init()
let att = NSAttributedString(string: contentString)
self.appendAttributedString(att)
//根据附件生成富文本
let attachment = NSTextAttachment()
attachment.image = UIImage(named:imageName)
// //设置（图片）字体大小
let attachmentH = label.font.lineHeight
//调节图片的大小
attachment.bounds = CGRectMake(0, -3, 25, attachmentH)
let attString = NSAttributedString(attachment: attachment)
if attributedInsertType == .First {
self.insertAttributedString(attString, atIndex: 0)
} else {
self.insertAttributedString(attString, atIndex: (contentString as NSString).length)
}
}
///根据文字内容修改指定的文字的颜色
convenience init(content: String,color: UIColor,colorString: String) {
self.init()
let contentAttStr = NSMutableAttributedString(string: content);
let range: NSRange = (content as NSString).rangeOfString(colorString)
contentAttStr.addAttribute(NSForegroundColorAttributeName, value: color, range: range)
self.appendAttributedString(contentAttStr)
}
}
extension NSString {
func emojiAttributedString() ->NSMutableAttributedString {
let plistArr = NSArray(contentsOfFile: NSBundle.mainBundle().pathForResource("emoticon.plist", ofType: nil)!)
//可变的属性文本
let attContent = NSMutableAttributedString(string: self as String)
// 1.通过正则表达式取出表情图片的名称\[\w+?\]
let pattern = "\\[\\w+?\\]"
// let error = NSError.init();
print("pattern\(pattern)")
//抛出的异常处理
var regx = NSRegularExpression()
do {
regx = try NSRegularExpression(pattern: pattern, options: NSRegularExpressionOptions.init(rawValue: 0))
} catch let error as NSError {
print(error)
return attContent
}
// 获的匹配结果
// __block NSString *emoticonName;
let results = regx.matchesInString(self as String, options: NSMatchingOptions.init(rawValue: 0), range: NSMakeRange(0, (self as NSString).length))
for result in results {
let resultStr = self.substringWithRange(result.range)
plistArr?.enumerateObjectsUsingBlock({ (obj, idx, __) in
let desStr = obj["des"] as! String
if desStr == resultStr {
let emotionName = (obj["name"])!
//必须要注意强拆，需要多打印调试
print("\(emotionName!)@2x.gif")
let attachment = NSTextAttachment();
//设置（图片）字体大小根据需要作调整
attachment.bounds = CGRectMake(0, -3, 25, 25)
attachment.image = UIImage(named: "\(emotionName!)@2x.gif")
let emojiStr = NSAttributedString(attachment: attachment)
attContent .replaceCharactersInRange(result.range, withAttributedString: emojiStr)
}
})
}
return attContent
}
}
OC代码
分类.h
#import <Foundation/Foundation.h>
typedef NS_ENUM(NSInteger,VZAttributedInsertType) {
VZAttributedInsertTypeFirst,
VZAttributedInsertTypeLast
};
@interface NSMutableAttributedString (VZMAttStr)
///文本最前面或最后面插入图片
- (instancetype)initWithImageName:(NSString *)imageName andStringWithContentString:(NSString *)contentString andWithAttributedInsertType:(VZAttributedInsertType) type andLabel:(UILabel *)label;
///文本最前面插入图片
+ (instancetype)attributedWithImageName:(NSString *)imageName andStringWithContentString:(NSString *)contentString andWithAttributedInsertType:(VZAttributedInsertType) type andLabel:(UILabel *)label;
///发送图片
- (instancetype)initWithImg:(UIImage *)image;
///发送图片
+ (instancetype)attributedWithImg:(UIImage *)image;
///回复内容改变指定文字的颜色
- (instancetype)initwithColorString:(NSString *)colorString andColor:(UIColor *)color andContentString:(NSString *)contentString;
///回复内容改变指定文字的颜色
+ (instancetype)attributedWithColorString:(NSString *)colorString Color:(UIColor *)color andContentString:(NSString *)contentString;
///根据文字内容修改指定的文字的颜色
- (instancetype)initwithContent:(NSString *)content andColor:(UIColor *)color andColorString:(NSString *)colorString;
///根据文字内容修改指定的文字的颜色
+ (instancetype)attributedWithContent:(NSString *)content andColor:(UIColor *)color andColorString:(NSString *)colorString;
@end
//用于调整副本显示的位置
@interface VZTextAttachment : NSTextAttachment
@end
@interface NSString (Emoji)
///带图的文本内容
- (NSAttributedString *)emojiAttributedString;
@end
.m文件
#import "NSMutableAttributedString+VZMAttStr.h"
@implementation NSMutableAttributedString (VZMAttStr)
///文本插入图片
- (instancetype)initWithImageName:(NSString *)imageName andStringWithContentString:(NSString *)contentString andWithAttributedInsertType:(VZAttributedInsertType) type andLabel:(UILabel *)label {
//根据附件生成富文本
self = [[NSMutableAttributedString alloc] initWithString:contentString];
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:imageName];
//设置（图片）字体大小
CGFloat attachmentH = label.font.lineHeight;
attachment.bounds = CGRectMake(0, -3, 25, attachmentH);
NSAttributedString *attString = [NSAttributedString attributedStringWithAttachment:attachment];
if (type == VZAttributedInsertTypeFirst) {
[self insertAttributedString:attString atIndex:0];
} else {
[self insertAttributedString:attString atIndex:contentString.length];
}
return self;
}
///文本插入图片
+ (instancetype)attributedWithImageName:(NSString *)imageName andStringWithContentString:(NSString *)contentString andWithAttributedInsertType:(VZAttributedInsertType) type andLabel:(UILabel *)label {
return [[self alloc] initWithImageName:imageName andStringWithContentString:contentString andWithAttributedInsertType: type andLabel:label];
}
///发送图片
- (instancetype)initWithImg:(UIImage *)image {
//根据附件生成富文本
self = [[NSMutableAttributedString alloc] init];
NSTextAttachment *attachment = [[NSTextAttachment alloc] init];
attachment.image = image;
//设置（图片）字体大小
NSAttributedString *attString = [NSAttributedString attributedStringWithAttachment:attachment];
[self insertAttributedString:attString atIndex:0];
return self;
}
///发送图片
+ (instancetype)attributedWithImg:(UIImage *)image {
return [[self alloc ] initWithImg:image];
}
///改变指定文字的颜色
- (instancetype)initwithColorString:(NSString *)colorString andColor:(UIColor *)color andContentString:(NSString *)contentString {
NSString *ContentStr = [NSString stringWithFormat:@"%@:%@",colorString,contentString];
NSMutableAttributedString *ContentAttStr = [[NSMutableAttributedString alloc] initWithString:ContentStr];
NSRange range = [ContentStr rangeOfString:[NSString stringWithFormat:@"%@:",colorString]];
[ContentAttStr addAttribute:NSForegroundColorAttributeName value:color range:range];
return ContentAttStr;
}
///改变指定文字的颜色
+ (instancetype)attributedWithColorString:(NSString *)colorString Color:(UIColor *)color andContentString:(NSString *)contentString {
return [[self alloc] initwithColorString:colorString andColor:color andContentString:contentString];
}
///根据文字内容修改指定的文字的颜色
- (instancetype)initwithContent:(NSString *)content andColor:(UIColor *)color andColorString:(NSString *)colorString {
NSMutableAttributedString *ContentAttStr = [[NSMutableAttributedString alloc] initWithString:content];
NSRange range = [content rangeOfString:colorString];
[ContentAttStr addAttribute:NSForegroundColorAttributeName value:color range:range];
return ContentAttStr;
}
///根据文字内容修改指定的文字的颜色
+ (instancetype)attributedWithContent:(NSString *)content andColor:(UIColor *)color andColorString:(NSString *)colorString{
return [[self alloc] initwithContent:content andColor:color andColorString:colorString];
}
@end
//根据Label的字体大小自适应图片的显示大小
@implementation VZTextAttachment
- (CGRect)attachmentBoundsForTextContainer:(NSTextContainer *)textContainer proposedLineFragment:(CGRect)lineFrag glyphPosition:(CGPoint)position characterIndex:(NSUInteger)charIndex {
return CGRectMake(0,-lineFrag.size.height * 0.2, lineFrag.size.height,lineFrag.size.height);
}
@end
@implementation NSString (Emoji)
///带图的文本内容
- (NSAttributedString *)emojiAttributedString {
NSArray *plistArr = [NSArray arrayWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"emoticon.plist" ofType:nil]];
//可变的属性文本
NSMutableAttributedString *attContent = [[NSMutableAttributedString alloc] initWithString:self];
// 1.通过正则表达式取出表情图片的名称
NSString *pattern = @"\\[\\w+?\\]";
NSError *error = nil;
NSRegularExpression *regx = [NSRegularExpression regularExpressionWithPattern:pattern options:0 error:&error];
if (error) {
NSLog(@"%@",error);
return attContent;
}
// 获的匹配结果
// __block NSString *emoticonName;
NSArray<NSTextCheckingResult *> *results = [regx matchesInString:self options:0 range:NSMakeRange(0, self.length)];
for (NSTextCheckingResult *result in results) {
NSString *resultStr = [self substringWithRange:result.range];
[plistArr enumerateObjectsUsingBlock:^(id _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
NSString *desStr = obj[@"des"];
//取出字符串对应的名字
if ([desStr isEqualToString:resultStr]) {
NSString *emoticonName = obj[@"name"];
VZTextAttachment *attachment = [[VZTextAttachment alloc] init];
attachment.image = [UIImage imageNamed:[NSString stringWithFormat:@"%@@2x.gif",emoticonName]];
NSAttributedString *emojiStr = [NSAttributedString attributedStringWithAttachment:attachment];
[attContent replaceCharactersInRange:result.range withAttributedString:emojiStr];
}
}];
}
return attContent;
}
@end
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