iOS 字符串上下标（二）

梦里梦外; 2022-06-08 08:41 172阅读 0赞

[点击打开链接][Link 1]上一章节的，如果在ios10以上，可能上下标的字体会很小，偏移的很严重，这一章节主要讲，如果修复

修改PollutantFormatlabel.m ：

+(void)PollutantFormatLabel:(UILabel *)label labelValue:(NSString *)labelValue {
        PollutantFormatlabel *p = [PollutantFormatlabel new];
    
        NSString *string = [self pollutantChineseToEnglish:labelValue];
        string = [ValueLabel valueLabel:string];
        
        float size = label.font.pointSize;
        UIFont *smallFont = [UIFont systemFontOfSize:size/1.5];
            
        NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] initWithString:string];
        [attString beginEditing];
    
        for (NSString *key in p.dic.allKeys) {
            NSRange strRange = [string rangeOfString:key];
            if (strRange.location != NSNotFound) {
                NSDictionary *dic = p.dic[key];
                NSInteger loc = [dic[@"loc"] integerValue]+strRange.location;
                NSInteger len = [dic[@"len"] integerValue];
                NSRange range = NSMakeRange(loc,len);
                NSNumber *scripting = dic[@"scripting"];
                NSInteger script = [scripting integerValue];
                
                [attString addAttribute:NSFontAttributeName value:(smallFont) range:range];
                //[attString addAttribute:(NSString*)kCTSuperscriptAttributeName value:scripting range:range];
                if (script == 1) {
                    [attString addAttribute:NSBaselineOffsetAttributeName value:@(size/3) range:range];
                }else {
                    [attString addAttribute:NSBaselineOffsetAttributeName value:@(-(size/3)) range:range];
                }
            }
        }
        
        [attString endEditing];
        label.text = string;
        label.attributedText = attString;
    }

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[Link 1]: http://blog.csdn.net/dashenid/article/details/78016977