注意:新做了一个支持gif的,键盘封装的比较好:新项目github地址
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类似微信的图(表情)文(文字)混排聊天,以及表情键盘。
给几张实现的效果图:
简单的来说一下流程和实现思路:点击键盘上的表情按钮->将表情转变成一段某种规则(自定义)的字符串(类似[哈哈])->将所有的需要发送消息的字符串(比如:你好呀[哈哈])发送给后台->客户端收到消息通过某种规则转换,把消息字符串转换成文字加表情展示出来。
简单的讲一下转码替换过程:
自定义一个转码工具类:在类里声明并实现一个方法:+ (NSMutableAttributedString*)changeStrWithStr:(NSString*)string Font:(UIFont*)font TextColor:(UIColor*)textColor
讲一下工具类的实现思路(最后会给出demo):
1.第一步加载对照表,并设置富文本参数:
//读取并加载对照表
NSString*path = [[NSBundlemainBundle]pathForResource:@"LiuqsEmoji"ofType:@"plist"];
_emojiImages= [NSDictionarydictionaryWithContentsOfFile:path];
//设置文本参数
NSMutableParagraphStyle*paragraphStyle = [[NSMutableParagraphStylealloc]init];
[paragraphStylesetLineSpacing:4.0f];
NSDictionary*dict = [NSDictionarydictionaryWithObjectsAndKeys:_textColor,NSForegroundColorAttributeName,_font,NSFontAttributeName,paragraphStyle,NSParagraphStyleAttributeName,nil];
CGSizemaxsize =CGSizeMake(1000,MAXFLOAT);
_emotionSize= [@"/"boundingRectWithSize:maxsizeoptions:NSStringDrawingUsesLineFragmentOriginattributes:dictcontext:nil].size;
_attStr= [[NSMutableAttributedStringalloc]initWithString:_stringattributes:dict];
2.正则匹对字符中的表情并保存结果
//比对结果
NSString*regexString =checkStr;
NSRegularExpression*regex = [NSRegularExpressionregularExpressionWithPattern:regexStringoptions:NSRegularExpressionCaseInsensitiveerror:nil];
NSRangetotalRange =NSMakeRange(0, [_stringlength]);
_matches= [regexmatchesInString:_stringoptions:0range:totalRange];
3.遍历结果数组,并将表情编码用图片附件替换,转成富文本并用字典数组保存富文本和对应的range
NSMutableArray*imageDataArray = [NSMutableArrayarray];
//遍历结果
for(inti = (int)_matches.count-1; i >=0; i --) {
NSMutableDictionary*record = [NSMutableDictionarydictionary];
LiuqsTextAttachment*attachMent = [[LiuqsTextAttachmentalloc]init];
attachMent.emojiSize=CGSizeMake(_emotionSize.height,_emotionSize.height);
NSTextCheckingResult*match = [_matchesobjectAtIndex:i];
NSRangematchRange = [matchrange];
NSString*tagString = [_stringsubstringWithRange:matchRange];
NSString*imageName = [_emojiImagesobjectForKey:tagString];
if(imageName ==nil|| imageName.length==0)continue;
//这里有个问题,需要先判断是否有图片,没有图片的话应该不操作,因为现在换用html处理,先不改!
NSString*cheakStr = [imageNamesubstringWithRange:NSMakeRange(1,2)];
if([cheakStrintValue] >60) {
NSString*path = [[NSBundlemainBundle]pathForResource:imageNameofType:@"gif"];
NSData*gifData = [NSDatadataWithContentsOfFile:path];
attachMent.contents= gifData;
attachMent.fileType=@"gif";
}else{
attachMent.image= [UIImageimageNamed:imageName];
}
NSAttributedString*imageStr = [NSAttributedStringattributedStringWithAttachment:attachMent];
[recordsetObject:[NSValuevalueWithRange:matchRange]forKey:@"range"];
[recordsetObject:imageStrforKey:@"image"];
[imageDataArrayaddObject:record];
}
_imageDataArray= imageDataArray;
4.遍历上一步的字典数组,从后往前用表情附件替换表情编码(一定要从后往前),不然range改变回造成错误。
最后返回结果,用label或者textview等加载就OK了。
NSMutableAttributedString*result =_attStr;
for(inti =0; i <_imageDataArray.count; i ++) {
NSRangerange = [_imageDataArray[i][@"range"]rangeValue];
NSDictionary*imageDic = [_imageDataArrayobjectAtIndex:i];
NSMutableAttributedString*imageStr = [imageDicobjectForKey:@"image"];
[resultreplaceCharactersInRange:rangewithAttributedString:imageStr];
}
_resultStr= result;
demo地址
然后是swift版本的地址:swift版本