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效果：

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====直接上代碼吧===

// // UILabel+StringFrame.h // QYER // // Created by qyer on 15/3/19. // Copyright (c) 2015年 QYER. All rights reserved. //#import <UIKit/UIKit.h>/*** uilable 行間距高度*/ static CGFloat const lineSapceHeight = 5.0f;@interface UILabel (StringFrame)#pragma mark - 獲取UILable Size- (CGSize)boundingRectWithSize:(CGSize)size; /*** 根據文字長度計算大小** @param content 文字長度* @param pFont 文字字號* @param pWidth 寬度**/ +(CGSize)getContentSize:(NSString *)content font:(UIFont *)pFont width:(CGFloat)pWidth; /*** 根據文字長度計算大小** @param content 文字長度* @param pFont 文字字號* @param pHeight 高度**/ +(CGSize)getContentSize:(NSString *)content font:(UIFont *)pFont height:(CGFloat)pHeight; /*** 根據文本獲取size ,有最大 寬高限制** @param string 文本* @param maxWidth 最大寬* @param maxHeight 最大高* @param font 字體* @param lineSpace 行間距(如果使用默認的,就傳nil)** @return size*/ +(CGSize)getContentSizeWithContentText:(NSString *)string andMaxWidth:(CGFloat)maxWidth andMaxHeight:(CGFloat)maxHeight AndFont:(UIFont*)font andLineSpacing:(NSNumber *)lineSpace; /** * 根據文本獲取size ,有最大 寬高限制 * * @param string 文本 * @param maxWidth 最大寬 * @param maxHeight 最大高 * @param attribute 富文本屬性 * * @return size */ +(CGSize)getContentSizeWithContentText:(NSString *)string andMaxWidth:(CGFloat)maxWidth andMaxHeight:(CGFloat)maxHeight andAttributes:(NSDictionary *)attribute; #pragma mark - 獲取UILable 每行顯示的文字 /** * 獲取lalbe 每行文字 * * @return 每行文字數組 */ - (NSArray *)getSeparatedLines; /** * 獲取lalbe 每行文字 * * @param text 根據文字內容 * * @return 每行文字數組 */ - (NSArray *)getSeparatedLinesWithText:(NSString*)text; /** * 獲取lalbe 每行文字 * * @param content 文字內容 * @param fonte fonte description * @param size size description * * @return return value description */ +(NSArray *)getSeparatedLinesWithText:(NSString*)content andFonte:(UIFont *)fonte andSize:(CGSize)size; #pragma mark - 完美解決 向UILable 文字最后插入N張圖片,支持向限制行數的UILable 最后一行插入,多余文字顯示... /** * 向文字末尾追加圖片,適用于已知Size的UILable * * @param contentStr 文字內容 * @param imgs 插入的圖片數組, 圖片最好帶間隔哦 */ -(void)insertImgToContentLast:(NSString *)contentStr imgs:(NSArray *)imgs; /** * 向文字末尾追加圖片,適用于AutoLayout 的UILable * * @param contentStr 文字內容 * @param imgs 插入的圖片數組, 圖片最好帶間隔哦 * @param estimateWidth 預估的UILable 最大寬度(已知的最大寬度) */ -(void)insertImgToContentLast:(NSString *)contentStr imgs:(NSArray *)imgs estimateWidth:(CGFloat)estimateWidth; /** * 向已知文字后插入圖片 * * @param insertImgArr insertImgArr description * @param appendAttributedString 可為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 - 獲取UILable Size- (CGSize)boundingRectWithSize:(CGSize)size {NSDictionary *attribute = @{NSFontAttributeName: self.font};CGSize retSize = [self.text boundingRectWithSize:sizeoptions:\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; } /** * 根據文本獲取size ,有最大 寬高限制 * * @param string 文本 * @param maxWidth 最大寬 * @param maxHeight 最大高 * @param attribute 富文本屬性 * * @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 有個bug ,當文字只有一行或不滿一行 會出現文字顯示不出來 */ 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; } /** * 根據文本獲取size ,有最大 寬高限制 * * @param string 文本 * @param maxWidth 最大寬 * @param maxHeight 最大高 * @param font 字體 * @param lineSpace 行間距(如果使用默認的,就傳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 有個bug ,當文字只有一行或不滿一行 會出現文字顯示不出來 */ 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 - 獲取UILable 每行顯示的文字 /** * 獲取lalbe 每行文字 * * @return 每行文字數組 */ - (NSArray *)getSeparatedLines { return [self getSeparatedLinesWithText:self.text]; } /** * 獲取lalbe 每行文字 * * @param text 根據文字內容 * * @return 每行文字數組 */ - (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]; } /** * 獲取lalbe 每行文字 * * @param content 文字內容 * @param fonte fonte description * @param size size description * * @return 每行文字數組 */ +(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 - 完美解決 向UILable 文字最后插入N張圖片,支持向限制行數的UILable 最后一行插入,多余文字顯示... /** * 向文字末尾追加圖片,適用于已知Size的UILable * * @param contentStr 文字內容 * @param imgs 插入的圖片數組, 圖片最好帶間隔哦 */ -(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]; } /** * 向文字末尾追加圖片,適用于AutoLayout 的UILable * * @param contentStr 文字內容 * @param imgs 插入的圖片數組, 圖片最好帶間隔哦 * @param estimateWidth 預估的UILable 最大寬度(已知的最大寬度) */ -(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 ; } //獲取每行文字需要預設寬度,不然每個字都會是單獨的一行 self.width = estimateWidth; NSArray *textLineArr = [self getSeparatedLinesWithText:contentStr]; NSInteger maxLine = self.numberOfLines; if (maxLine == 0) { self.text = contentStr; //追加圖片 [self configTitleLableAttributedString:imgs AttributedString:nil]; return; } NSInteger lastLineIndex = maxLine - 1; if ([textLineArr count] <= lastLineIndex) { self.text = contentStr; //追加圖片 [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; //追加圖片 [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)) { //預設寬度 self.width = lastTextMaxWith; //最大寬帶下能顯示的字數 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; } //追加圖片 [self configTitleLableAttributedString:imgs AttributedString:nil]; } /** * 向已知文字后插入圖片 * * @param insertImgArr insertImgArr description * @param appendAttributedString 可為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]; //帶 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,當文字剛好夠一行,添加圖片后折行，but.第二行圖片和第一行文字沒有行間距。。 http://scottzhu.com/blog/2015/02/14/attach-stars-to-the-end-of-a-uilabel/ */ [appendAttributedString appendAttributedString: [[NSAttributedString alloc] initWithString:@" "]]; }]; self.attributedText = appendAttributedString; } @end

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轉載于:https://www.cnblogs.com/DamonTang/p/5344048.html

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