NSAttributedString

NSAttributedString对象管理适用于字符串中单个字符或字符范围的字符串和关联的属性集（例如字体和字距）。NSAttributedString对象的默认字体是Helvetica 12点，可能与平台的默认系统字体不同。因此，您可能希望创建适用于您的应用程序的非默认属性的新字符串。您还可以使用NSParagraphStyle类及其子类NSMutableParagraphStyle来封装NSAttributedString类使用的段落或标尺属性。

实例化方法和使用方法

实例化方法

使用字符串初始化

- (instancetype)initWithString:(NSString *)str;

代码示例

NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"测试数据"];

字典中存放一些属性名和属性值

- (instancetype)initWithString:(NSString *)str attributes:(NSDictionary<NSString *,id> *)attrs;

代码示例

NSDictionary *attributedDict = @{
                                     NSFontAttributeName:[UIFont systemFontOfSize:16.0],
                                     NSForegroundColorAttributeName:[UIColor redColor],
                                     NSUnderlineStyleAttributeName:@(NSUnderlineStyleThick)
                                     };
    NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:@"测试数据" attributes:attributedDict];

使用NSAttributedString初始化，与NSMutableString,NSString类似

- (instancetype)initWithAttributedString:(NSAttributedString *)attrStr;

使用方法

为某一范围内的文字设置多个属性的方法

- (void)setAttributes:(NSDictionary<NSString *,id> *)attrs range:(NSRange)range;

//代码示例

NSString *string = @"测试数据";
NSDictionary *attributedDict = @{
                                     NSFontAttributeName:[UIFont systemFontOfSize:16.0],
                                     NSForegroundColorAttributeName:[UIColor redColor],
                                     NSUnderlineStyleAttributeName:@(NSUnderlineStyleThick)
                                     };
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:string];
    
[attributedString setAttributes:attributedDict range:NSMakeRange(0, string.length)];

为某一范围内的文字添加某个属性的方法

- (void)addAttribute:(NSString *)name value:(id)value range:(NSRange)range;

//代码示例

NSString *string = @"测试数据";
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:string];
    
[attributedString addAttribute:NSForegroundColorAttributeName value:[UIColor blueColor] range:NSMakeRange(0, string.length)];

为某一范围内的文字添加多个属性的方法

- (void)addAttributes:(NSDictionary<NSString *,id> *)attrs range:(NSRange)range;

//代码示例

NSString *string = @"测试数据";
NSDictionary *attributedDict = @{
                                     NSFontAttributeName:[UIFont systemFontOfSize:16.0],
                                     NSForegroundColorAttributeName:[UIColor redColor],
                                     NSUnderlineStyleAttributeName:@(NSUnderlineStyleThick)
                                     };
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:string];
    
[attributedString addAttributes:attributedDict range:NSMakeRange(0, string.length)];

移除某个范围内的某个属性的方法

- (void)removeAttribute:(NSString *)name range:(NSRange)range;

//代码示例

 NSString *string = @"测试数据";
 NSDictionary *attributedDict = @{
                                     NSFontAttributeName:[UIFont systemFontOfSize:16.0],
                                     NSForegroundColorAttributeName:[UIColor redColor],
                                     NSUnderlineStyleAttributeName:@(NSUnderlineStyleThick)
                                     };
NSMutableAttributedString *attributedString = [[NSMutableAttributedString alloc] initWithString:string];
    
[attributedString addAttributes:attributedDict range:NSMakeRange(0, string.length)];
  
    
[attributedString removeAttribute:NSForegroundColorAttributeName range:NSMakeRange(0, string.length)];

属性及说明

富文本段落排版格式属性说明