KouDaiProject/YouHuiProject/YouHui/OtherLib/DXAlertView/UILabel+Chan...

//
//  UILabel+ChangeLineSpaceAndWordSpace.m
//  Elephant
//
//  Created by dyy on 2018/1/19.
//  Copyright © 2018年 杭州大象品牌营销策划有限公司. All rights reserved.
//

#import "UILabel+ChangeLineSpaceAndWordSpace.h"
#import <objc/runtime.h>
#import <CoreText/CoreText.h>

@implementation UILabel (ChangeLineSpaceAndWordSpace)

- (void)changeLineSpaceWithSpace:(float)space {
    
    NSString *labelText = self.text;
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:labelText];
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc] init];
    [paragraphStyle setLineSpacing:space];
    [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0, [labelText length])];
    self.attributedText = attributedString;
    [self sizeToFit];
    
}

-(CGFloat)characterSpace{
    return [objc_getAssociatedObject(self,_cmd) floatValue];
}

-(void)setCharacterSpace:(CGFloat)characterSpace{
    objc_setAssociatedObject(self, @selector(characterSpace), @(characterSpace), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    
}

-(CGFloat)lineSpace{
    return [objc_getAssociatedObject(self, _cmd) floatValue];
}

-(void)setLineSpace:(CGFloat)lineSpace{
    objc_setAssociatedObject(self, @selector(lineSpace), @(lineSpace), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}


-(NSString *)keywords{
    return objc_getAssociatedObject(self, _cmd);
}

-(void)setKeywords:(NSString *)keywords{
    objc_setAssociatedObject(self, @selector(keywords), keywords, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(UIFont *)keywordsFont{
    return objc_getAssociatedObject(self, _cmd);
}

-(void)setKeywordsFont:(UIFont *)keywordsFont{
    objc_setAssociatedObject(self, @selector(keywordsFont), keywordsFont, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(UIColor *)keywordsColor{
    return objc_getAssociatedObject(self, _cmd);
}

-(void)setKeywordsColor:(UIColor *)keywordsColor{
    objc_setAssociatedObject(self, @selector(keywordsColor), keywordsColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}

-(NSString *)underlineStr{
    return objc_getAssociatedObject(self, _cmd);
}

-(void)setUnderlineStr:(NSString *)underlineStr{
    objc_setAssociatedObject(self, @selector(underlineStr), underlineStr, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    
}

-(UIColor *)underlineColor{
    return objc_getAssociatedObject(self, _cmd);
}

-(void)setUnderlineColor:(UIColor *)underlineColor{
    objc_setAssociatedObject(self, @selector(underlineColor), underlineColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
    
}

/**
 *  根据最大宽度计算label宽，高
 *
 *  @param maxWidth 最大宽度
 *
 *  @return rect
 */
- (CGSize)getLableRectWithMaxWidth:(CGFloat)maxWidth{
    
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:self.text];
    [attributedString addAttribute:NSFontAttributeName value:self.font range:NSMakeRange(0,self.text.length)];
    
    NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];
    // paragraphStyle.alignment=NSTextAlignmentCenter;
    paragraphStyle.alignment=self.textAlignment;
    paragraphStyle.lineBreakMode=self.lineBreakMode;
    // 行间距
    if(self.lineSpace > 0){
        [paragraphStyle setLineSpacing:self.lineSpace];
        [attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0,self.text.length)];
    }
    
    // 字间距
    if(self.characterSpace > 0){
        long number = self.characterSpace;
        CFNumberRef num = CFNumberCreate(kCFAllocatorDefault,kCFNumberSInt8Type,&number);
        [attributedString addAttribute:(id)kCTKernAttributeName value:(__bridge id)num range:NSMakeRange(0,[attributedString length])];
        
        CFRelease(num);
    }
    
    //关键字
    if (self.keywords) {
        NSRange itemRange = [self.text rangeOfString:self.keywords];
        if (self.keywordsFont) {
            [attributedString addAttribute:NSFontAttributeName value:self.keywordsFont range:itemRange];
            
        }
        
        if (self.keywordsColor) {
            [attributedString addAttribute:NSForegroundColorAttributeName value:self.keywordsColor range:itemRange];
            
        }
    }
    
    //下划线
    if (self.underlineStr) {
        NSRange itemRange = [self.text rangeOfString:self.underlineStr];
        [attributedString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:itemRange];
        if (self.underlineColor) {
            [attributedString addAttribute:NSUnderlineColorAttributeName value:self.underlineColor range:itemRange];
        }
    }
    
    
    
    self.attributedText = attributedString;
    
    //计算方法一
    //计算文本rect，但是发现设置paragraphStyle.lineBreakMode=NSLineBreakByTruncatingTail;后高度计算不准确
    
    //    CGRect rect = [attributedString boundingRectWithSize:CGSizeMake(maxWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading context:nil];
    //    NSLog(@"rect==%@,%f",NSStringFromCGRect(rect),ceil(rect.size.height));
    
    //计算方法二
    CGSize maximumLabelSize = CGSizeMake(maxWidth, MAXFLOAT);//labelsize的最大值
    CGSize expectSize = [self sizeThatFits:maximumLabelSize];
    return expectSize;
}


@end