前言：项目中用到检索表情，网址与号码，但是看了TTTAttributeLabel，emojyLabel，奈何都不太满意，plist格式不太符合，而且这两个第三方用到检索都是系统自带的检索，检测网址方面不准确， 所以就需要自己使用正则进行检索。
关于以上两个三方检索不准确的可以参考：检索网址
接下来写一下实现的过程， 没有高度封装，仅供参考
关于网址与号码的正则再说明下：
网址：KURlREGULAR @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,4})(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\.\-]+\.([a-zA-Z]{2,4})(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&*+?:_/=<>]*)?)|(((http[s]{0,1}|ftp)://|)((?:(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d)))\.){3}(?:25[0-5]|2[0-4]\d|((1\d{2})|([1-9]?\d))))(:\d+)?(/[a-zA-Z0-9\.\-~!@#$%^&*+?:_/=<>]*)?)"
号码： KPHONENUMBERREGLAR @"\d{3}-\d{8}|\d{4}-\d{7}|\d{11}"
比如我要转的字符串为
@"简书：http://jianshu.com哈哈哈[调皮][流汗][偷笑][再见][可爱][色][害羞][委屈][委屈][抓狂][酷][酷][嘘][嘘][龇牙][大哭][大哭][大哭][龇牙][嘘][嘘][调皮][调皮]哈哈哈哈[嘘][调皮][调皮]18637963241他大舅他二舅都是舅，高桌子地板头都是木头"
我需要做的是检索网址并且替换为和微博一样的链接，号码和链接有选中状态，因为UITextview有检测url 的方法可以添加点击事件，所以就采用UITextview进行封装。主要采取正则表达式与RegexKitLite配合做检索
1 . 首先建立一个模型，把文字检索为富文本，检索出 表情，网址以及号码。中间需要使用一个模型存储检索出来的结果。对于特殊符号的表情建立一个模型。其实富文本的都是逐个检索，然后处理，最后拼接为一个NSMutableAttributedString。
#import <Foundation/Foundation.h>
#import <UIKit/UIKit.h>
@interface ZLStatus : NSObject
//源内容
@property (nonatomic, copy) NSString *text;
/** string 信息内容 -- 带有属性的(特殊文字会高亮显示\显示表情)*/
@property (nonatomic, copy) NSAttributedString *attributedText;
@end
#import "ZLStatus.h"
#import "ZLSpecial.h"
#import "ZLTextPart.h"
#import "RegexKitLite.h"
@implementation ZLStatus
- (void)setText:(NSString *)text
{
_text = [text copy];
// 利用text生成attributedText
self.attributedText = [self attributedTextWithText:text];
}
/**
* 普通文字 --> 属性文字
*
* @param text 普通文字
*
* @return 属性文字
*/
- (NSAttributedString *)attributedTextWithText:(NSString *)text
{
NSMutableAttributedString *attributedText = [[NSMutableAttributedString alloc] init];
// 表情的规则
NSString *emotionPattern = @"\\[[0-9a-zA-Z\\u4e00-\\u9fa5]+\\]";
// @的规则
NSString *atPattern = @"@[0-9a-zA-Z\\u4e00-\\u9fa5-_]+";
// #话题#的规则
NSString *topicPattern = @"#[0-9a-zA-Z\\u4e00-\\u9fa5]+#";
// url链接的规则
NSString *urlPattern = @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(((http[s]{0,1}|ftp)://|)((?:(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d)))\\.){3}(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d))))(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)";
NSString *phoneNumber =@"\\d{3}-\\d{8}|\\d{3}-\\d{7}|\\d{4}-\\d{8}|\\d{4}-\\d{7}|1+[3578]+\\d{9}|\\d{8}|\\d{7}"
;
NSString *pattern = [NSString stringWithFormat:@"%@|%@|%@|%@|%@", emotionPattern, atPattern, topicPattern, urlPattern,phoneNumber];
// 遍历所有的特殊字符串
NSMutableArray *parts = [NSMutableArray array];
[text enumerateStringsMatchedByRegex:pattern usingBlock:^(NSInteger captureCount, NSString *const __unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
if ((*capturedRanges).length == 0) return;
ZLTextPart *part = [[ZLTextPart alloc] init];
part.special = YES;
part.text = *capturedStrings;
part.emotion = [part.text hasPrefix:@"["] && [part.text hasSuffix:@"]"];
part.range = *capturedRanges;
[parts addObject:part];
}];
// 遍历所有的非特殊字符
[text enumerateStringsSeparatedByRegex:pattern usingBlock:^(NSInteger captureCount, NSString *const __unsafe_unretained *capturedStrings, const NSRange *capturedRanges, volatile BOOL *const stop) {
if ((*capturedRanges).length == 0) return;
ZLTextPart *part = [[ZLTextPart alloc] init];
part.text = *capturedStrings;
part.range = *capturedRanges;
[parts addObject:part];
}];
// 排序
// 系统是按照从小 -> 大的顺序排列对象
[parts sortUsingComparator:^NSComparisonResult(ZLTextPart *part1, ZLTextPart *part2) {
// NSOrderedAscending = -1L, NSOrderedSame, NSOrderedDescending
// 返回NSOrderedSame:两个一样大
// NSOrderedAscending(升序):part2>part1
// NSOrderedDescending(降序):part1>part2
if (part1.range.location > part2.range.location) {
// part1>part2
// part1放后面, part2放前面
return NSOrderedDescending;
}
// part1<part2
// part1放前面, part2放后面
return NSOrderedAscending;
}];
UIFont *font = [UIFont systemFontOfSize:15];
NSMutableArray *specials = [NSMutableArray array];
NSString *filePath = [[NSBundle mainBundle] pathForResource:@"face.plist" ofType:nil];
NSArray *face = [NSArray arrayWithContentsOfFile:filePath];
// 按顺序拼接每一段文字
for (ZLTextPart *part in parts) {
// 等会需要拼接的子串
NSAttributedString *substr = nil;
if (part.isEmotion) { // 表情 表情处理的时候，需要根据你自己的plist进行单独处理，像一些第三方里自定义的plist，格式要是也是很严格的
NSString *str = [text substringWithRange:part.range];
for (int i = 0; i < face.count; i ++) {
if ([face[i][@"face_name"] isEqualToString:str]) {
//face[i][@"png"]就是我们要加载的图片
//新建文字附件来存放我们的图片,iOS7才新加的对象
NSTextAttachment *textAttachment = [[NSTextAttachment alloc] init];
//给附件添加图片
textAttachment.image = [UIImage imageNamed:face[i][@"face_image_name"]];
//调整一下图片的位置,如果你的图片偏上或者偏下，调整一下bounds的y值即可
textAttachment.bounds = CGRectMake(0, -6, 25, 25);
//把附件转换成可变字符串，用于替换掉源字符串中的表情文字
substr = [NSAttributedString attributedStringWithAttachment:textAttachment];
break;
}
}
} else if (part.special) { // 非表情的特殊文字
NSURL *url =[NSURL URLWithString:part.text];
if (url.scheme) {
substr = [[NSAttributedString alloc] initWithString:part.text attributes:@{
NSForegroundColorAttributeName : [UIColor redColor]
}];
NSString *string =@"网页链接";
NSTextAttachment *textAttachment = [[NSTextAttachment alloc] init];
//给附件添加图片
textAttachment.image = [UIImage imageNamed:@"链接"];
//调整一下图片的位置,如果你的图片偏上或者偏下，调整一下bounds的y值即可
textAttachment.bounds = CGRectMake(0, -6, 25, 25);
NSMutableAttributedString *tempAttribute = [[NSMutableAttributedString alloc]initWithAttributedString:[NSAttributedString attributedStringWithAttachment:textAttachment]];
NSMutableAttributedString *tempAttribute2 = [[NSMutableAttributedString alloc]initWithAttributedString:[NSAttributedString attributedStringWithAttachment:textAttachment]];
NSAttributedString *text =[[NSAttributedString alloc]initWithString:string attributes:@{NSForegroundColorAttributeName:[UIColor blueColor]}];
[tempAttribute appendAttributedString:text];
substr = [[NSAttributedString alloc]initWithAttributedString:tempAttribute];
// 创建特殊对象
ZLSpecial *s = [[ZLSpecial alloc] init];
s.text = string;
//需要添加附属图片的长度，负责点击范围会变化
NSUInteger loc = attributedText.length+tempAttribute2.length;
NSUInteger len = string.length;
s.range = NSMakeRange(loc, len);
s.urlString = part.text;
[specials addObject:s];
}else{
NSLog(@"%@",part.text);
substr = [[NSAttributedString alloc] initWithString:part.text attributes:@{
NSForegroundColorAttributeName : [UIColor redColor]
}];
// 创建特殊对象
ZLSpecial *s = [[ZLSpecial alloc] init];
s.text = part.text;
NSUInteger loc = attributedText.length;
NSUInteger len = part.text.length;
s.range = NSMakeRange(loc, len);
s.urlString = part.text;
[specials addObject:s];
}
} else { // 非特殊文字
substr = [[NSAttributedString alloc] initWithString:part.text];
}
[attributedText appendAttributedString:substr];
}
// 一定要设置字体,保证计算出来的尺寸是正确的
[attributedText addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, attributedText.length)];
[attributedText addAttribute:@"specials" value:specials range:NSMakeRange(0, 1)];
return attributedText;
}
中间存储检索结果与特殊字符的model：
#import <Foundation/Foundation.h>
@interface ZLTextPart : NSObject
/** 这段文字的内容 */
@property (nonatomic, copy) NSString *text;
/** 这段文字的范围 */
@property (nonatomic, assign) NSRange range;
/** 是否为特殊文字 */
@property (nonatomic, assign, getter = isSpecical) BOOL special;
/** 是否为表情 */
@property (nonatomic, assign, getter = isEmotion) BOOL emotion;
@end
#import <Foundation/Foundation.h>
@interface ZLSpecial : NSObject
/** 这段特殊文字的内容 */
@property (nonatomic, copy) NSString *text;
/** 这段特殊文字的范围 */
@property (nonatomic, assign) NSRange range;
@property(nonatomic,copy)NSString *urlString;设置完内容后我们需要计算内容高度，然后复制给Textview,建立一个Frame模型。
#import <Foundation/Foundation.h>
#import "ZLStatus.h"
@interface ZLFrame : NSObject
//设置
/** 限制最大行数 这一步必须在设置完contentLabelF之后设置*/
@property(nonatomic,assign)int maxNumLine;
@property(nonatomic,strong)ZLStatus *status;
@property(nonatomic,assign)CGFloat frameX;
@property(nonatomic,assign)CGFloat frameY;
@property(nonatomic,assign)CGFloat maxWidth;
//取值
/** */
/** 正文 */
@property (nonatomic, assign) CGRect contentLabelF;
@property(nonatomic,assign)CGRect maxNumLabelF;
@end
#import "ZLFrame.h"
@interface ZLFrame()
//检测高度的label;
@property(nonatomic,strong)UILabel *templateLabel;
@end
@implementation ZLFrame
-(void)setStatus:(ZLStatus *)status{
_status = status;
CGSize contentSize = [status.attributedText boundingRectWithSize:CGSizeMake(self.maxWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin context:nil].size;
self.contentLabelF = (CGRect){{self.frameX , self.frameY}, contentSize};
}
-(void)setMaxNumLine:(int)maxNumLine{
_maxNumLine = maxNumLine;
self.templateLabel.frame =CGRectMake(self.frameX, self.frameY, self.maxWidth, 0);
self.templateLabel.attributedText = self.status.attributedText;
self.templateLabel.numberOfLines = maxNumLine;
[self.templateLabel sizeToFit];
self.maxNumLabelF = self.templateLabel.frame;
}
-(void)setFrameX:(CGFloat)frameX{
_frameX = frameX;
}
-(void)setFrameY:(CGFloat)frameY{
_frameY = frameY;
}
-(void)setMaxWidth:(CGFloat)maxWidth{
_maxWidth = maxWidth;
}
-(UILabel *)templateLabel{
if (!_templateLabel) {
_templateLabel =[[UILabel alloc]init];
}
return _templateLabel;
}
@end最后自定义Textview，引入Frame模型
#import <UIKit/UIKit.h>
#import "ZLFrame.h"
@interface ZLStatusTextView : UITextView
/** 所有的特殊字符串(里面存放着HWSpecial) */
@property (nonatomic, strong) NSArray *specials;
@property(nonatomic,strong)ZLFrame *zlFrame;
@property(nonatomic,assign)int maxLine;
@property(nonatomic,assign)BOOL isShowAll;//是否全部显示
@end
#import "ZLStatusTextView.h"
#import "ZLSpecial.h"
#define ZLStatusTextViewCoverTag 999
@implementation ZLStatusTextView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
self.editable = NO;
self.textContainerInset = UIEdgeInsetsMake(0, -5, 0, -5);
// 禁止滚动, 让文字完全显示出来
self.scrollEnabled = NO;
}
return self;
}
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
// 触摸对象
UITouch *touch = [touches anyObject];
// 触摸点
CGPoint point = [touch locationInView:self];
NSArray *specials = [self.attributedText attribute:@"specials" atIndex:0 effectiveRange:NULL];
BOOL contains = NO;
for (ZLSpecial *special in specials) {
self.selectedRange = special.range;
// self.selectedRange --影响--> self.selectedTextRange
// 获得选中范围的矩形框
NSArray *rects = [self selectionRectsForRange:self.selectedTextRange];
// 清空选中范围
self.selectedRange = NSMakeRange(0, 0);
for (UITextSelectionRect *selectionRect in rects) {
CGRect rect = selectionRect.rect;
if (rect.size.width == 0 || rect.size.height == 0) continue;
if (CGRectContainsPoint(rect, point)) { // 点中了某个特殊字符串
contains = YES;
break;
}
}
if (contains) {
for (UITextSelectionRect *selectionRect in rects) {
CGRect rect = selectionRect.rect;
if (rect.size.width == 0 || rect.size.height == 0) continue;
UIView *cover = [[UIView alloc] init];
cover.backgroundColor = [UIColor greenColor];
cover.frame = rect;
cover.tag = ZLStatusTextViewCoverTag;
cover.layer.cornerRadius = 5;
[self insertSubview:cover atIndex:0];
}
break;
}
}
// 在被触摸的特殊字符串后面显示一段高亮的背景
}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
// 触摸对象
UITouch *touch = [touches anyObject];
// 触摸点
CGPoint point = [touch locationInView:self];
NSArray *specials = [self.attributedText attribute:@"specials" atIndex:0 effectiveRange:NULL];
BOOL contains = NO;
for (ZLSpecial *special in specials) {
self.selectedRange = special.range;
// self.selectedRange --影响--> self.selectedTextRange
// 获得选中范围的矩形框
NSArray *rects = [self selectionRectsForRange:self.selectedTextRange];
// 清空选中范围
self.selectedRange = NSMakeRange(0, 0);
for (UITextSelectionRect *selectionRect in rects) {
CGRect rect = selectionRect.rect;
if (rect.size.width == 0 || rect.size.height == 0) continue;
if (CGRectContainsPoint(rect, point)) { // 点中了某个特殊字符串
contains = YES;
break;
}
}
if (contains) {
for (UITextSelectionRect *selectionRect in rects) {
CGRect rect = selectionRect.rect;
if (rect.size.width == 0 || rect.size.height == 0) continue;
if (special.urlString) {
NSString *urlStr = special.urlString;
NSURL *url =[NSURL URLWithString:urlStr];
if (url.scheme) {
[[UIApplication sharedApplication]openURL:url];
}else{
NSMutableString *str=[[NSMutableString alloc] initWithFormat:@"tel:%@",special.text];
UIWebView *callWebview = [[UIWebView alloc] init];
[callWebview loadRequest:[NSURLRequest requestWithURL:[NSURL URLWithString:str]]];
[self addSubview:callWebview];
}
}
}
break;
}
}
[self touchesCancelled:touches withEvent:event];
});
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event
{
// 去掉特殊字符串后面的高亮背景
for (UIView *child in self.subviews) {
if (child.tag == ZLStatusTextViewCoverTag) [child removeFromSuperview];
}
}
-(void)setZlFrame:(ZLFrame *)zlFrame{
_zlFrame = zlFrame;
self.attributedText = zlFrame.status.attributedText;
self.frame = zlFrame.contentLabelF;
}
-(void)setMaxLine:(int)maxLine{
_maxLine = maxLine;
[self.zlFrame setMaxNumLine:maxLine];
self.frame = self.zlFrame.maxNumLabelF;
}
-(void)setIsShowAll:(BOOL)isShowAll{
_isShowAll = isShowAll;
if (isShowAll) {
self.frame = self.zlFrame.contentLabelF;
}else{
[self setMaxLine:3];
}
}
@end最后在ViewController里引入即可：
#import "ViewController.h" #import "ZLStatusTextView.h" #define kTempText @"简书：http://jianshu.com哈哈哈[调皮][流汗][偷笑][再见][可爱][色][害羞][委屈][委屈][抓狂][酷][酷][嘘][嘘][龇牙][大哭][大哭][大哭][龇牙][嘘][嘘][调皮][调皮]哈哈哈哈[嘘][调皮][调皮]18637963241他大舅他二舅都是舅，高桌子地板头都是木头" #define KURlREGULAR @"((http[s]{0,1}|ftp)://[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(www.[a-zA-Z0-9\\.\\-]+\\.([a-zA-Z]{2,4})(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)|(((http[s]{0,1}|ftp)://|)((?:(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d)))\\.){3}(?:25[0-5]|2[0-4]\\d|((1\\d{2})|([1-9]?\\d))))(:\\d+)?(/[a-zA-Z0-9\\.\\-~!@#$%^&*+?:_/=<>]*)?)" #define KPHONENUMBERREGLAR @"\\d{3}-\\d{8}|\\d{3}-\\d{7}|\\d{4}-\\d{8}|\\d{4}-\\d{7}|1+[3578]+\\d{9}|\\d{8}|\\d{7}" #import "ZLStatus.h" #import "ZLFrame.h" #import "LxButton.h" @interface ViewController ()<UITextViewDelegate> @property(nonatomic,strong)ZLStatusTextView *textview; @end @implementation ViewController - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. self.textview =[[ZLStatusTextView alloc]initWithFrame:CGRectMake(20, 100, 250, 200)]; ZLStatus *status = [[ZLStatus alloc]init]; status.text = kTempText; ZLFrame *zlFrame =[[ZLFrame alloc]init]; zlFrame.frameX = self.textview.frame.origin.x; zlFrame.frameY = self.textview.frame.origin.y; zlFrame.maxWidth = self.textview.frame.size.width; zlFrame.status = status; self.textview.zlFrame = zlFrame; //设置最大行数用于展开 self.textview.maxLine = 3; self.textview.isShowAll = YES; [self.view addSubview:self.textview]; self.textview.backgroundColor =[UIColor lightGrayColor]; LxButton *button =[LxButton LXButtonWithTitle:@"限制最大行数" titleFont:[UIFont systemFontOfSize:15] Image:nil backgroundImage:nil backgroundColor:[UIColor brownColor] titleColor:[UIColor blueColor] frame:CGRectMake(20, 40, 150, 40)]; [self.view addSubview:button]; __weak ViewController *weakSelf = self; [button addClickBlock:^(UIButton *button) { weakSelf.textview.isShowAll =!weakSelf.textview.isShowAll; }]; } @end
demo地址：富文本检索表情，网址，替换链接，限制最大输入行
链接：http://www.jianshu.com/p/77c3b27f8858
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