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 (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 (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] 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 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