forKeyPath:@"_placeholderLabel.textColor"];更新为：textField.attributedPlaceholder=[[NSAttributedStringalloc]initWithString

[NSMutableDictionaryalloc]init];//传入url建立url组件类NSURLComponents*urlComponents=[[NSURLComponentsalloc]initWithString

其实这几个方法看似没啥区别，用的时候也很少在意，但最近无聊折腾了一下，却发现有些端倪。这里先说Apple的一个优化策略：TaggedPointer，这里引用大神的文章：iOSTaggedPointer-。简单来说就是运行时让能用指针地址表达的值就用指针地址表达，不再单独分配内存地址，上个代码先：以a的ascii码为基础，依次加一，然后根据新的ascii码生成字符串a、b、c.....i、j，并打印

attributes后,xib中设置的没有效果,比如:字体颜色失效NSMutableAttributedString*attributedString=[[NSMutableAttributedStringalloc]initWithString

_block可变对象类型OC代码intmain(intargc,constchar*argv[]){__blockNSMutableString*str=[[NSMutableStringalloc]initWithString

一、给字符串设置下划线效果:例如给字符串ABCDEFG设置下划线效果NSMutableAttributedString*str=[[NSMutableAttributedStringalloc]initWithString

在开发过程中发现10.3版本上下划线不显示：在设置下划线的时候：NSMutableAttributedString*newPrice=[[NSMutableAttributedStringalloc]initWithString

n2.XXXXXXXX\n3.XXXXXXXX";NSMutableAttributedString*attributedString=[[NSMutableAttributedStringalloc]initWithString

NSString//编码EMOJI表情字符串-(NSString*)encodeEmojiString{NSMutableString*attributeString=[[NSMutableStringalloc]initWithString

NSString*infoString=@"X2andH20A‡B†C*";NSMutableAttributedString*attString=[[NSMutableAttributedStringalloc]initWithString

UITextField添加PlaceHolder支持方法1（NSAttributedString）NSAttributedString*attrString=[[NSAttributedStringalloc]initWithString

valueForKey、setValue:forKey获取和设置私有属性，需要使用其它方式修改_phoneTF.attributedPlaceholder=[[NSAttributedStringalloc]initWithString

NSMutableAttributedStringalloc]init];[stringappendAttributedString:[[NSMutableAttributedStringalloc]initWithString

labelWithSpace:(float)space{NSMutableAttributedString*attributedString1=[[NSMutableAttributedStringalloc]initWithString

设置富文本所有的key（共21种）NSMutableAttributedString*abs=[[NSMutableAttributedStringalloc]initWithString:text];

@",model.originalPrice];NSMutableAttributedString*attributedString=[[NSMutableAttributedStringalloc]initWithString

title=@"重要提示❗️";//改变UIAlertController标题颜色NSMutableAttributedString*str=[[NSMutableAttributedStringalloc]initWithString

创建一个不可变字符串str1值是常量字符串NSString*str1=@"常量字符串";NSLog(@"%@",str1);2.用字符串创建字符串构造NSString*str2=[[NSStringalloc]initWithString

void)searchKeyHighlight:(NSString*)key{NSMutableAttributedString*str=[[NSMutableAttributedStringalloc]initWithString

NSMutableAttributedString，现将标题加入，再采用段落，进行居中NSMutableAttributedString*attribute=[[NSMutableAttributedStringalloc]initWithString

NSStringstringWithFormat:@"总积分(分):%.2f",a];NSMutableAttributedString*label1Str=[[NSMutableAttributedStringalloc]initWithString

self.entity.textContent;NSMutableAttributedString*attributedString=[[NSMutableAttributedStringalloc]initWithString

NSMutableAttributedString*attri=[[NSMutableAttributedStringalloc]initWithString:[NSStringstringWithFormat

*text=[NSMutableAttributedStringnew];NSMutableAttributedString*one=[[NSMutableAttributedStringalloc]initWithString

UITextField的共有属性attributedPlaceholderself.textField.attributedPlaceholder=[[NSAttributedStringalloc]initWithString

1、声明一个字符串常量NSString*str=@“snms";2、通过一个已知的字符串生成一个字符串常量NSString*str2=[[NSStringalloc]initWithString:str

指定字体大小，默认是12point；UIFont代码实例:NSMutableAttributedString*originString=[[NSMutableAttributedStringalloc]initWithString

NSNumbernumberWithInteger:NSUnderlineStyleSingle]};NSMutableAttributedString*attribtStr=[[NSMutableAttributedStringalloc]initWithString

NSAttributedString*str=[[NSAttributedStringalloc]initWithString:nilattributes:@{NSForegroundColorAttributeName

NSString*tempString1=@"绑定手机号";NSMutableAttributedString*attributedString=[[NSMutableAttributedStringalloc]initWithString

1.改变字符串中某几个字的颜色这是富文本，如下：NSMutableAttributedString*str=[[NSMutableAttributedStringalloc]initWithString

NSMutableAttributedStringalloc]init];//文字NSMutableAttributedString*attri1=[[NSMutableAttributedStringalloc]initWithString

/NSAttributedString相当于带属性的字符串，实现图文混排使用步骤：1.初始化字符串2.初始化字符串的属性3.将属性赋值给字符串1.初始化字符串的常用方法：-(instancetype)initWithString

起送",self.goods.lowPrice];NSMutableAttributedString*attributeString=[[NSMutableAttributedStringalloc]initWithString

NSMutableAttributedString*)addCancelLine{NSMutableAttributedString*attri=[[NSMutableAttributedStringalloc]initWithString

颜色和字体NSMutableAttributedString*str=[[NSMutableAttributedStringalloc]initWithString:[NSStringstringWithFormat

;//2.alloc创建的字符串NSString*str2=[[NSStringalloc]initWithString:@"通过alloc创建的字符串"];//3.通过格式化符创建inta=100;NSString

AVSpeechSynthesizer*av=[[AVSpeechSynthesizeralloc]init];AVSpeechUtterance*utterance=[[AVSpeechUtterancealloc]initWithString

100,100,300,100)];label.numberOfLines=0;NSMutableAttributedString*content=[[NSMutableAttributedStringalloc]initWithString

model-->JSON/Dic/DataModel*model=[[Modelalloc]initWithString:jsonStringerror:nil];model.name=@"ChangedName

字体大小一样NSString*heightlightString=@"叫我第一名";NSMutableAttributedString*str=[[NSMutableAttributedStringalloc]initWithString

//设置messageNSMutableAttributedString*messageStr=[[NSMutableAttributedStringalloc]initWithString:@"message

NSMutableAttributedString使用使用字符串初始化-(id)initWithString:(NSString*)str;NSMutableAttributedString*attString

NSMutableAttributedString*AttributedStr=[[NSMutableAttributedStringalloc]initWithString:[NSStringstringWithFormat

标签内显示不同格式文本(不同字体,不同颜色,删除线,下划线)NSAttributedString显示字符串实例化方法和使用方法实例化方法：使用字符串初始化(id)initWithString:(NSString

heightWithString:(NSString*)string{NSMutableAttributedString*attributedString1=[[NSMutableAttributedStringalloc]initWithString

YES;NSString*canEditText=@"可重新编辑";NSMutableAttributedString*attrStr=[[NSMutableAttributedStringalloc]initWithString

NSString*holderText=@"输入餐厅名称或者编号";NSMutableAttributedString*placeholder=[[NSMutableAttributedStringalloc]initWithString

Manajay:我的github博客//富文本属性NSMutableAttributedString*attributedTitle=[[NSMutableAttributedStringalloc]initWithString

NSMutableAttributedString*attriStr=[[NSMutableAttributedStringalloc]initWithString:_labelGrowthValue.text