首页 > 代码库 > iOS学习 - 23 加载本地 txt文件,NSMutableParagraphStyle 段落格式,缩放动画
iOS学习 - 23 加载本地 txt文件,NSMutableParagraphStyle 段落格式,缩放动画
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]; }}
完整代码在 github 上,点我下载
iOS学习 - 23 加载本地 txt文件,NSMutableParagraphStyle 段落格式,缩放动画
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