//
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// UILabel+LXAdd.m
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// LXLabelDemo
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//
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// Created by 刘鑫 on 16/4/13.
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// Copyright © 2016年 liuxin. All rights reserved.
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//
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#import "UILabel+LXAdd.h"
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#import <objc/runtime.h>
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#import <CoreText/CoreText.h>
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@implementation UILabel (LXAdd)
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-(CGFloat)characterSpace{
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return [objc_getAssociatedObject(self,_cmd) floatValue];
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}
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-(void)setCharacterSpace:(CGFloat)characterSpace{
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objc_setAssociatedObject(self, @selector(characterSpace), @(characterSpace), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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-(CGFloat)lineSpace{
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return [objc_getAssociatedObject(self, _cmd) floatValue];
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}
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-(void)setLineSpace:(CGFloat)lineSpace{
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objc_setAssociatedObject(self, @selector(lineSpace), @(lineSpace), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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-(NSString *)keywords{
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return objc_getAssociatedObject(self, _cmd);
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}
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-(void)setKeywords:(NSString *)keywords{
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objc_setAssociatedObject(self, @selector(keywords), keywords, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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-(UIFont *)keywordsFont{
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return objc_getAssociatedObject(self, _cmd);
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}
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-(void)setKeywordsFont:(UIFont *)keywordsFont{
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objc_setAssociatedObject(self, @selector(keywordsFont), keywordsFont, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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-(UIColor *)keywordsColor{
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return objc_getAssociatedObject(self, _cmd);
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}
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-(void)setKeywordsColor:(UIColor *)keywordsColor{
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objc_setAssociatedObject(self, @selector(keywordsColor), keywordsColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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-(NSString *)underlineStr{
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return objc_getAssociatedObject(self, _cmd);
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}
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-(void)setUnderlineStr:(NSString *)underlineStr{
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objc_setAssociatedObject(self, @selector(underlineStr), underlineStr, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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-(UIColor *)underlineColor{
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return objc_getAssociatedObject(self, _cmd);
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}
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-(void)setUnderlineColor:(UIColor *)underlineColor{
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objc_setAssociatedObject(self, @selector(underlineColor), underlineColor, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
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}
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/**
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* 根据最大宽度计算label宽，高
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*
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* @param maxWidth 最大宽度
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*
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* @return rect
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*/
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- (CGSize)getLableRectWithMaxWidth:(CGFloat)maxWidth{
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NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc]initWithString:self.text];
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[attributedString addAttribute:NSFontAttributeName value:self.font range:NSMakeRange(0,self.text.length)];
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NSMutableParagraphStyle *paragraphStyle = [[NSMutableParagraphStyle alloc]init];
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// paragraphStyle.alignment=NSTextAlignmentCenter;
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paragraphStyle.alignment=self.textAlignment;
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paragraphStyle.lineBreakMode=self.lineBreakMode;
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// 行间距
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if(self.lineSpace > 0){
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[paragraphStyle setLineSpacing:self.lineSpace];
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[attributedString addAttribute:NSParagraphStyleAttributeName value:paragraphStyle range:NSMakeRange(0,self.text.length)];
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}
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// 字间距
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if(self.characterSpace > 0){
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long number = self.characterSpace;
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CFNumberRef num = CFNumberCreate(kCFAllocatorDefault,kCFNumberSInt8Type,&number);
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[attributedString addAttribute:(id)kCTKernAttributeName value:(__bridge id)num range:NSMakeRange(0,[attributedString length])];
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CFRelease(num);
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}
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//关键字
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if (self.keywords) {
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NSRange itemRange = [self.text rangeOfString:self.keywords];
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if (self.keywordsFont) {
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[attributedString addAttribute:NSFontAttributeName value:self.keywordsFont range:itemRange];
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}
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if (self.keywordsColor) {
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[attributedString addAttribute:NSForegroundColorAttributeName value:self.keywordsColor range:itemRange];
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}
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}
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//下划线
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if (self.underlineStr) {
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NSRange itemRange = [self.text rangeOfString:self.underlineStr];
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[attributedString addAttribute:NSUnderlineStyleAttributeName value:@(NSUnderlineStyleSingle) range:itemRange];
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if (self.underlineColor) {
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[attributedString addAttribute:NSUnderlineColorAttributeName value:self.underlineColor range:itemRange];
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}
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}
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self.attributedText = attributedString;
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//计算方法一
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//计算文本rect，但是发现设置paragraphStyle.lineBreakMode=NSLineBreakByTruncatingTail;后高度计算不准确
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// CGRect rect = [attributedString boundingRectWithSize:CGSizeMake(maxWidth, MAXFLOAT) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading context:nil];
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// NSLog(@"rect==%@,%f",NSStringFromCGRect(rect),ceil(rect.size.height));
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//计算方法二
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CGSize maximumLabelSize = CGSizeMake(maxWidth, MAXFLOAT);//labelsize的最大值
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CGSize expectSize = [self sizeThatFits:maximumLabelSize];
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return expectSize;
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}
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@end
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