思路：
1.new 一个 Empty 后缀为 .txt 文件，内容随笔拷贝一段
2.用 NSString 接收本地文件，再用一个标题拼接字符串
3.创建一个 NSMutableParagraphStyle 实例，设置标题居中、标题距离正文间隔
4.创建一个 NSMutableParagraphStyle 实例，设置正文左对齐、每段开头缩进 10
5.创建一个基础动画的实例，用代理监听动画结束
话不多说上代码
#pragma mark -- 拼接字符
- (void)loadData:(NSString *)filename { //第一个段落
NSMutableParagraphStyle *first = [[NSMutableParagraphStyle alloc]init]; first.alignment = NSTextAlignmentCenter; first.lineSpacing = 10; //第二个段落
NSMutableParagraphStyle *second = [[NSMutableParagraphStyle alloc]init]; //从左开始写
second.alignment = NSTextAlignmentLeft; //首行缩进
second.firstLineHeadIndent = 10; //间距
second.lineSpacing = 10; UIFont *titleFont = [UIFont systemFontOfSize:16]; UIFont *contextFont = [UIFont systemFontOfSize:13]; NSMutableAttributedString *str1 = [[NSMutableAttributedString alloc]initWithString:@"游戏许可及服务协议" attributes:@{NSParagraphStyleAttributeName:first,NSFontAttributeName:titleFont}]; //标题拼接正文，正文前加换行符
NSString *str = [NSString stringWithFormat:@"\n%@",filename]; NSMutableAttributedString *str2 = [[NSMutableAttributedString alloc]initWithString:str attributes:@{NSParagraphStyleAttributeName:second,NSFontAttributeName:contextFont}]; [str1 appendAttributedString:str2]; _textView.attributedText = str1; } #pragma mark -- 关闭动画
- (void)closeAniamtion:(UIView *)view { CABasicAnimation *animation = [CABasicAnimation animation]; animation.keyPath = @"transform.scale"; animation.toValue = @0.9; animation.duration = 0.4; animation.delegate = self; animation.removedOnCompletion = NO; animation.fillMode = kCAFillModeForwards; [view.layer addAnimation:animation forKey:@"closeAnimation"]; } #pragma mark -- 本地 txt 文件内容
- (NSString *)filename { //本地 txt 文件
NSString *path = [[NSBundle mainBundle]pathForResource:@"浅遇时光，静好无恙.txt" ofType:nil]; //取出内容
NSString *filename = [[NSString alloc]initWithContentsOfFile:path encoding:NSUTF8StringEncoding error:nil]; return filename; }
#pragma mark -- 代理监听动画停止
- (void)animationDidStop:(CAAnimation *)anim finished:(BOOL)flag { if ([_bgView.layer animationForKey:@"closeAnimation"] == anim) { [_bgView removeFromSuperview]; } }
字体间距,中文的文字宽度是相等的,英文和数字的宽度不一样
- (void)baseChinese:(UILabel *)label loadFirst:(NSString *)firstStr second:(NSString *)secondStr { //第一个段落 NSMutableParagraphStyle *first = [[NSMutableParagraphStyle alloc]init]; //第二个段落 NSMutableParagraphStyle *second = [[NSMutableParagraphStyle alloc]init]; int a = (int)firstStr.length; int b = (int)secondStr.length; if (a>b) { NSDictionary *dict1 = @{NSParagraphStyleAttributeName:first}; NSMutableAttributedString *firstAttr = [[NSMutableAttributedString alloc]initWithString:firstStr attributes:dict1]; /** 计算间距 **/ CGFloat lineGap = label.font.pointSize *(a-b)/(b-1); NSString *longSecondStr = [NSString stringWithFormat:@"\n%@",secondStr]; NSMutableAttributedString *secondAttr = [[NSMutableAttributedString alloc]initWithString:longSecondStr attributes:@{NSParagraphStyleAttributeName:second}]; NSRange range = {0,b}; /** 添加间距属性 **/ [secondAttr addAttribute:NSKernAttributeName value:[NSNumber numberWithFloat:lineGap] range:range]; /** 拼接字符串 **/ [firstAttr appendAttributedString:secondAttr]; label.attributedText = firstAttr; }else if(b>a){ NSRange range = {0,a}; /** 计算间距 **/ CGFloat lineGap = label.font.pointSize *(b-a)/(a-1); NSDictionary *dict1 = @{NSParagraphStyleAttributeName:first}; NSMutableAttributedString *firstAttr = [[NSMutableAttributedString alloc]initWithString:firstStr attributes:dict1]; /** 添加间距属性 **/ [firstAttr addAttribute:NSKernAttributeName value:[NSNumber numberWithFloat:lineGap] range:range]; NSString *longSecondStr = [NSString stringWithFormat:@"\n%@",secondStr]; NSMutableAttributedString *secondAttr = [[NSMutableAttributedString alloc]initWithString:longSecondStr attributes:@{NSParagraphStyleAttributeName:second}]; /** 拼接字符串 **/ [firstAttr appendAttributedString:secondAttr]; label.attributedText = firstAttr; }else{ /** 如果相等,直接拼接 **/ label.text = [NSString stringWithFormat:@"%@\n%@",firstStr,secondStr]; } }
完整代码在 github 上，传送门