完美解决 向UILable 文字最后插入N张图片,支持向限制行数的UILable 最后一行插入,多余文字显示...

效果：

====直接上代码吧===

//
//  UILabel+StringFrame.h
//  QYER
//
//  Created by qyer on 15/3/19.
//  Copyright (c) 2015年 QYER. All rights reserved.
//

#import <UIKit/UIKit.h>

/**
 *  uilable 行间距高度
 */
static CGFloat const lineSapceHeight = 5.0f;

@interface UILabel (StringFrame)

#pragma mark - 获取UILable Size

- (CGSize)boundingRectWithSize:(CGSize)size;
/**
 *  根据文字长度计算大小
 *
 *  @param content 文字长度
 *  @param pFont   文字字号
 *  @param pWidth  宽度
 *
 */
+(CGSize)getContentSize:(NSString *)content font:(UIFont *)pFont width:(CGFloat)pWidth;
/**
 *  根据文字长度计算大小
 *
 *  @param content 文字长度
 *  @param pFont   文字字号
 *  @param pHeight  高度
 *
 */
+(CGSize)getContentSize:(NSString *)content font:(UIFont *)pFont height:(CGFloat)pHeight;
/**
 *  根据文本获取size ,有最大 宽高限制
 *
 *  @param string    文本
 *  @param maxWidth  最大宽
 *  @param maxHeight 最大高
 *  @param font      字体
 *  @param lineSpace 行间距(如果使用默认的,就传nil)
 *
 *  @return size
 */
+(CGSize)getContentSizeWithContentText:(NSString *)string andMaxWidth:(CGFloat)maxWidth andMaxHeight:(CGFloat)maxHeight AndFont:(UIFont*)font andLineSpacing:(NSNumber *)lineSpace;
/**
 *  根据文本获取size ,有最大 宽高限制
 *
 *  @param string    文本
 *  @param maxWidth  最大宽
 *  @param maxHeight 最大高
 *  @param attribute 富文本属性
 *
 *  @return size
 */
+(CGSize)getContentSizeWithContentText:(NSString *)string andMaxWidth:(CGFloat)maxWidth andMaxHeight:(CGFloat)maxHeight andAttributes:(NSDictionary *)attribute;

#pragma mark - 获取UILable 每行显示的文字

/**
 *  获取lalbe 每行文字
 *
 *  @return 每行文字数组
 */
- (NSArray *)getSeparatedLines;
/**
 *  获取lalbe 每行文字
 *
 *  @param text 根据文字内容
 *
 *  @return 每行文字数组
 */
- (NSArray *)getSeparatedLinesWithText:(NSString*)text;
/**
 *  获取lalbe 每行文字
 *
 *  @param content 文字内容
 *  @param fonte   fonte description
 *  @param size    size description
 *
 *  @return return value description
 */
+(NSArray *)getSeparatedLinesWithText:(NSString*)content andFonte:(UIFont *)fonte andSize:(CGSize)size;

#pragma mark - 完美解决 向UILable 文字最后插入N张图片,支持向限制行数的UILable 最后一行插入,多余文字显示...

/**
 *  向文字末尾追加图片,适用于已知Size的UILable
 *
 *  @param contentStr 文字内容
 *  @param imgs       插入的图片数组, 图片最好带间隔哦
 */
-(void)insertImgToContentLast:(NSString *)contentStr imgs:(NSArray *)imgs;
/**
 *  向文字末尾追加图片,适用于AutoLayout 的UILable
 *
 *  @param contentStr    文字内容
 *  @param imgs          插入的图片数组, 图片最好带间隔哦
 *  @param estimateWidth 预估的UILable 最大宽度(已知的最大宽度)
 */
-(void)insertImgToContentLast:(NSString *)contentStr imgs:(NSArray *)imgs estimateWidth:(CGFloat)estimateWidth;
/**
 *  向已知文字后插入图片
 *
 *  @param insertImgArr           insertImgArr description
 *  @param appendAttributedString 可为nil
 */
-(void)configTitleLableAttributedString:(NSArray *)insertImgArr AttributedString:(NSMutableAttributedString *)appendAttributedString;

@end

//
//  UILabel+StringFrame.m
//  QYER
//
//  Created by qyer on 15/3/19.
//  Copyright (c) 2015年 QYER. All rights reserved.
//

#import "UILabel+StringFrame.h"

#import <CoreText/CoreText.h>

@implementation UILabel (StringFrame)

#pragma mark - 获取UILable Size

- (CGSize)boundingRectWithSize:(CGSize)size
{
    NSDictionary *attribute = @{NSFontAttributeName: self.font};

    CGSize retSize = [self.text boundingRectWithSize:size
                                             options:\
                      NSStringDrawingTruncatesLastVisibleLine |
                      NSStringDrawingUsesLineFragmentOrigin |
                      NSStringDrawingUsesFontLeading
                                          attributes:attribute
                                             context:nil].size;

    return retSize;
}

+(CGSize)getContentSize:(NSString *)content font:(UIFont *)pFont width:(CGFloat)pWidth{

    CGSize contentSize;
    if (ios7) {
        contentSize = [content boundingRectWithSize:CGSizeMake(pWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:pFont,NSFontAttributeName, nil] context:nil].size;
    }else{
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        contentSize = [content sizeWithFont:pFont constrainedToSize:CGSizeMake(pWidth, MAXFLOAT) lineBreakMode:NSLineBreakByCharWrapping];
#pragma clang diagnostic pop

    }
    return contentSize;
}

+(CGSize)getContentSize:(NSString *)content font:(UIFont *)pFont height:(CGFloat)pHeight{

    CGSize contentSize;
    if (ios7) {
        contentSize = [content boundingRectWithSize:CGSizeMake(MAXFLOAT, pHeight) options:NSStringDrawingUsesLineFragmentOrigin attributes:[NSDictionary dictionaryWithObjectsAndKeys:pFont,NSFontAttributeName, nil] context:nil].size;
    }else{
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
        contentSize = [content sizeWithFont:pFont constrainedToSize:CGSizeMake(MAXFLOAT, pHeight) lineBreakMode:NSLineBreakByCharWrapping];
#pragma clang diagnostic pop

    }
    return contentSize;
}

/**
*  根据文本获取size ,有最大 宽高限制
*
*  @param string    文本
*  @param maxWidth  最大宽
*  @param maxHeight 最大高
*  @param attribute 富文本属性
*
*  @return size
*/
+(CGSize)getContentSizeWithContentText:(NSString *)string andMaxWidth:(CGFloat)maxWidth andMaxHeight:(CGFloat)maxHeight  andAttributes:(NSDictionary *)attribute{
    CGSize size = CGSizeZero;
    if (IsEmpty(string)) {
        return size;
    }
    if (string) {
        if ([string respondsToSelector:
             @selector(boundingRectWithSize:options:attributes:context:)]) {
            size = [string boundingRectWithSize:CGSizeMake(maxWidth, maxHeight)
                                        options:NSStringDrawingUsesLineFragmentOrigin| NSStringDrawingTruncatesLastVisibleLine |NSStringDrawingUsesFontLeading
                                     attributes:attribute
                                        context:nil].size;
        }else {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
            size = [string sizeWithFont:attribute[@"NSFontAttributeName"]
                      constrainedToSize:CGSizeMake(maxWidth, maxHeight)
                          lineBreakMode:NSLineBreakByCharWrapping];
#pragma clang diagnostic pop
        }
    }
    if (!CGSizeEqualToSize(CGSizeZero, size)) {

        CGFloat wight = maxWidth;
        CGFloat height = ceil(size.height);
        /**
         *  使用 NIAttributedLabel 有个bug ,当文字只有一行或不满一行 会出现文字显示不出来
         */
        if (!attribute) {
            NSArray *rows = [UILabel getSeparatedLinesWithText:string  andFonte:attribute[NSFontAttributeName] andSize:size];
            if ([rows count]==1) {
                CGSize offsetSize = [UILabel getContentSize:string font:attribute[NSFontAttributeName] width:maxWidth];
                size = CGSizeMake(ceil(offsetSize.width) , ceil(offsetSize.height));
            }else{
                size = CGSizeMake(wight ,height);
            }
        }else {
            size = CGSizeMake(wight ,height);
        }
    }
    return size;
}

/**
 *  根据文本获取size ,有最大 宽高限制
 *
 *  @param string    文本
 *  @param maxWidth  最大宽
 *  @param maxHeight 最大高
 *  @param font      字体
 *  @param lineSpace 行间距(如果使用默认的,就传nil)
 *
 *  @return size
 */
+(CGSize)getContentSizeWithContentText:(NSString *)string andMaxWidth:(CGFloat)maxWidth andMaxHeight:(CGFloat)maxHeight AndFont:(UIFont*)font andLineSpacing:(NSNumber *)lineSpace{
    CGSize size = CGSizeZero;
    if (IsEmpty(string)) {
        return size;
    }
    if (string && font) {
        if ([string respondsToSelector:
             @selector(boundingRectWithSize:options:attributes:context:)]) {
            NSMutableParagraphStyle * paragraphStyle = [[NSMutableParagraphStyle alloc] init];
            paragraphStyle.lineBreakMode = NSLineBreakByWordWrapping;
            paragraphStyle.alignment = NSTextAlignmentLeft;
            if (lineSpace) {
                paragraphStyle.lineSpacing = [lineSpace floatValue];
            }
            size = [string boundingRectWithSize:CGSizeMake(maxWidth, maxHeight)
                                        options:NSStringDrawingUsesLineFragmentOrigin| NSStringDrawingTruncatesLastVisibleLine |NSStringDrawingUsesFontLeading
                                     attributes:@{NSFontAttributeName:font,
                                                  NSParagraphStyleAttributeName:paragraphStyle}
                                        context:nil].size;

        }else {
#pragma clang diagnostic push
#pragma clang diagnostic ignored "-Wdeprecated-declarations"
            size = [string sizeWithFont:font
                      constrainedToSize:CGSizeMake(maxWidth, maxHeight)
                          lineBreakMode:NSLineBreakByCharWrapping];
#pragma clang diagnostic pop
        }
    }
    if (!CGSizeEqualToSize(CGSizeZero, size)) {

        CGFloat wight = ceil(maxWidth);
        CGFloat height = ceil(size.height );

        /**
         *  使用 NIAttributedLabel 有个bug ,当文字只有一行或不满一行 会出现文字显示不出来
         */
        NSArray *rows = [UILabel getSeparatedLinesWithText:string  andFonte:font andSize:size];
        if ([rows count]==1) {
            CGSize offsetSize = [UILabel getContentSize:string font:font width:maxWidth];
            size = CGSizeMake(ceil(offsetSize.width) , ceil(offsetSize.height));
        }else{
            size = CGSizeMake(wight ,height);
        }

    }
    return size;
}

#pragma mark - 获取UILable 每行显示的文字

/**
 *  获取lalbe 每行文字
 *
 *  @return 每行文字数组
 */
- (NSArray *)getSeparatedLines {
    return [self getSeparatedLinesWithText:self.text];
}

/**
 *  获取lalbe 每行文字
 *
 *  @param text 根据文字内容
 *
 *  @return 每行文字数组
 */
- (NSArray *)getSeparatedLinesWithText:(NSString*)text
{
    /**
     *  fix NSConcreteMutableAttributedString initWithString:: nil value
     */
    if (!(text && [text isKindOfClass:[NSString class]])) {
        return nil;
    }

    return [UILabel getSeparatedLinesWithText:text andFonte:[self font] andSize:[self frame].size];
}

/**
 *  获取lalbe 每行文字
 *
 *  @param content 文字内容
 *  @param fonte   fonte description
 *  @param size    size description
 *
 *  @return 每行文字数组
 */
+(NSArray *)getSeparatedLinesWithText:(NSString*)content andFonte:(UIFont *)fonte andSize:(CGSize)size{
    if (!(content&&[content isKindOfClass:[NSString class]]) ||
        !(fonte&& [fonte isKindOfClass:[UIFont class]]) ||
        CGSizeEqualToSize(CGSizeZero, size)) {
        return nil;
    }
    NSString *text = content;
    UIFont   *font = fonte;
    CGRect    rect = CGRectMake(0, 0, size.width,size.height);

    CTFontRef myFont = CTFontCreateWithName((__bridge CFStringRef)([font fontName]), [font pointSize], NULL);
    NSMutableAttributedString *attStr = [[NSMutableAttributedString alloc] initWithString:text];
    [attStr addAttribute:(NSString *)kCTFontAttributeName value:(__bridge id)myFont range:NSMakeRange(0, attStr.length)];

    CTFramesetterRef frameSetter = CTFramesetterCreateWithAttributedString((__bridge CFAttributedStringRef)attStr);

    CGMutablePathRef path = CGPathCreateMutable();
    CGPathAddRect(path, NULL, CGRectMake(0,0,rect.size.width,100000));

    CTFrameRef frame = CTFramesetterCreateFrame(frameSetter, CFRangeMake(0, 0), path, NULL);

    NSArray *lines = (__bridge NSArray *)CTFrameGetLines(frame);
    NSMutableArray *linesArray = [[NSMutableArray alloc]init];

    for (id line in lines)
    {
        CTLineRef lineRef = (__bridge CTLineRef )line;
        CFRange lineRange = CTLineGetStringRange(lineRef);
        NSRange range = NSMakeRange(lineRange.location, lineRange.length);

        NSString *lineString = [text substringWithRange:range];
        [linesArray addObject:lineString];
    }

    CFRelease(frameSetter);
    CFRelease(myFont);
    CFRelease(frame);
    CFRelease(path);

    return (NSArray *)linesArray;
}

#pragma mark - 完美解决 向UILable 文字最后插入N张图片,支持向限制行数的UILable 最后一行插入,多余文字显示...

/**
 *  向文字末尾追加图片,适用于已知Size的UILable
 *
 *  @param contentStr 文字内容
 *  @param imgs       插入的图片数组, 图片最好带间隔哦
 */
-(void)insertImgToContentLast:(NSString *)contentStr imgs:(NSArray *)imgs{
    if (IsEmpty(contentStr) || !imgs || [imgs count] == 0) {
        self.text = IsEmpty(contentStr)?@"":contentStr;
        return ;
    }

    [self insertImgToContentLast:contentStr imgs:imgs estimateWidth:[self frame].size.width];
}
/**
 *  向文字末尾追加图片,适用于AutoLayout 的UILable
 *
 *  @param contentStr    文字内容
 *  @param imgs          插入的图片数组, 图片最好带间隔哦
 *  @param estimateWidth 预估的UILable 最大宽度(已知的最大宽度)
 */
-(void)insertImgToContentLast:(NSString *)contentStr imgs:(NSArray *)imgs estimateWidth:(CGFloat)estimateWidth{
    if (IsEmpty(contentStr) || !imgs || [imgs count] == 0 || estimateWidth == 0) {
        self.text = IsEmpty(contentStr)?@"":contentStr;
        return ;
    }

    //获取每行文字需要预设宽度,不然每个字都会是单独的一行
    self.width = estimateWidth;
    NSArray *textLineArr =  [self getSeparatedLinesWithText:contentStr];
    NSInteger maxLine = self.numberOfLines;

    if (maxLine ==  0) {
        self.text = contentStr;
        //追加图片
        [self configTitleLableAttributedString:imgs AttributedString:nil];
        return;
    }
    NSInteger lastLineIndex = maxLine - 1;

    if ([textLineArr count] <= lastLineIndex) {
        self.text = contentStr;
        //追加图片
        [self configTitleLableAttributedString:imgs AttributedString:nil];
        return;
    }

    __block CGFloat imgWith = 0.0;
    [imgs enumerateObjectsUsingBlock:^(UIImage* img, NSUInteger idx, BOOL * _Nonnull stop) {
        imgWith += img.size.width;
    }];

    CGFloat lastTextMaxWith = estimateWidth - imgWith;
    if (lastTextMaxWith <= 0) {
        self.text = contentStr;
        //追加图片
        [self configTitleLableAttributedString:imgs AttributedString:nil];
        return ;
    }

    if ([textLineArr count] > lastLineIndex) {
        NSMutableString *muShowTitle = [NSMutableString string];
        [textLineArr enumerateObjectsUsingBlock:^(id  _Nonnull obj, NSUInteger idx, BOOL * _Nonnull stop) {
            if (idx > (lastLineIndex - 1)) {
                //预设宽度
                self.width = lastTextMaxWith;
                //最大宽带下能显示的字数
                NSArray *lastLineArr = [self getSeparatedLinesWithText:textLineArr[lastLineIndex]];
                NSString *lastLineText = lastLineArr[0];
                //                DDLogDebug(@"====lastLineText=======%@==",lastLineText);
                if ([lastLineArr count] > 1) {
                    lastLineText = [lastLineText stringByReplacingCharactersInRange:NSMakeRange(lastLineText.length - 3, 3) withString:@"..."];
                }
                //                DDLogDebug(@"====lastLineArr[0]=======%@==",lastLineText);
                [muShowTitle appendString:lastLineText];

                * stop = YES;
                return ;
            }
            [muShowTitle appendString:textLineArr[idx]];
        }];
        self.text = muShowTitle;
//        self.width = estimateWidth;
    }

    //追加图片
    [self configTitleLableAttributedString:imgs AttributedString:nil];
}

/**
 *  向已知文字后插入图片
 *
 *  @param insertImgArr           insertImgArr description
 *  @param appendAttributedString 可为nil
 */
-(void)configTitleLableAttributedString:(NSArray *)insertImgArr AttributedString:(NSMutableAttributedString *)appendAttributedString{
    if (!insertImgArr || [insertImgArr count] == 0) {
        return ;
    }
    if (!appendAttributedString) {
        appendAttributedString = [[NSMutableAttributedString alloc] initWithString:self.text];
    }

    [insertImgArr enumerateObjectsUsingBlock:^(UIImage* img, NSUInteger idx, BOOL * _Nonnull stop) {

        NSTextAttachment *textAttachment = [[NSTextAttachment alloc] init];
        //带 x 的
        textAttachment.image = img;

        CGFloat mid = self.font.descender + self.font.capHeight;
        CGFloat imgY = self.font.descender - textAttachment.image.size.height/2 + mid + 2;
        textAttachment.bounds = CGRectMake(0, imgY, textAttachment.image.size.width, textAttachment.image.size.height);

        NSAttributedString *iconAttributedString = [NSAttributedString attributedStringWithAttachment:textAttachment];
        [appendAttributedString replaceCharactersInRange:NSMakeRange(self.text.length, 0) withAttributedString:iconAttributedString];
        /**
         fix,当文字刚好够一行,添加图片后折行，but.第二行图片和第一行文字没有行间距。。
         http://scottzhu.com/blog/2015/02/14/attach-stars-to-the-end-of-a-uilabel/
         */
        [appendAttributedString appendAttributedString: [[NSAttributedString alloc] initWithString:@" "]];

    }];

    self.attributedText = appendAttributedString;
}

@end