NSAttributedString(FWFoundation)

@interface NSAttributedString (FWFoundation)

如果需要实现行内图片可点击效果，可使用UITextView添加附件或Link并实现delegate.shouldInteractWith方法即可。 注意iOS在后台运行时，如果调用NSAttributedString解析html会导致崩溃(如动态切换深色模式时在后台解析html)。解决方法是提前在前台解析好或者后台异步到下一个主线程RunLoop

  • NSAttributedString对象转换为html字符串

    Declaration

    Objective-C

    - (nullable NSString *)fw_htmlString;

  • 计算所占尺寸，需设置Font等

    Declaration

    Objective-C

    @property (nonatomic, readonly) CGSize fw_textSize;

  • 计算在指定绘制区域内所占尺寸，需设置Font等

    Declaration

    Objective-C

    - (CGSize)fw_textSizeWithDrawSize:(CGSize)drawSize;

  • html字符串转换为NSAttributedString对象。如需设置默认字体和颜色，请使用addAttributes方法或附加CSS样式

    Declaration

    Objective-C

    + (nullable instancetype)fw_attributedStringWithHtmlString:
    (nonnull NSString *)htmlString;

  • 图片转换为NSAttributedString对象，可实现行内图片样式。其中bounds.x会设置为间距，y常用算法：(font.capHeight - image.size.height) / 2.0

    Declaration

    Objective-C

    + (nonnull NSAttributedString *)fw_attributedStringWithImage:
                                    (nullable UIImage *)image
                                                      bounds:(CGRect)bounds;

  • 快速创建NSAttributedString并指定高亮部分文字和样式，链接设置NSLinkAttributeName|URL属性即可

    Declaration

    Objective-C

    + (nonnull NSAttributedString *)
    fw_attributedStringWithString:(nonnull NSString *)string
                       attributes:
                           (nullable NSDictionary<NSAttributedStringKey, id> *)
                               attributes
                        highlight:(nonnull NSString *)highlight
              highlightAttributes:
                  (nullable NSDictionary<NSAttributedStringKey, id> *)
                      highlightAttributes;

  • 快速创建NSAttributedString，自定义字体

    Declaration

    Objective-C

    + (nonnull instancetype)fw_attributedString:(nonnull NSString *)string
                                   withFont:(nullable UIFont *)font;

  • 快速创建NSAttributedString，自定义字体和颜色

    Declaration

    Objective-C

    + (nonnull instancetype)fw_attributedString:(nonnull NSString *)string
                                   withFont:(nullable UIFont *)font
                                  textColor:(nullable UIColor *)textColor;

  • html字符串转换为NSAttributedString对象，可设置默认系统字体和颜色(附加CSS方式)

    Declaration

    Objective-C

    + (nullable instancetype)
    fw_attributedStringWithHtmlString:(nonnull NSString *)htmlString
                    defaultAttributes:
                        (nullable NSDictionary<NSAttributedStringKey, id> *)
                            attributes;

  • html字符串转换为NSAttributedString主题对象，可设置默认系统字体和动态颜色，详见FWThemeObject

    Declaration

    Objective-C

    + (nonnull FWThemeObject<NSAttributedString *> *)
    fw_themeObjectWithHtmlString:(nonnull NSString *)htmlString
               defaultAttributes:
                   (nullable NSDictionary<NSAttributedStringKey, id> *)
                       attributes;

  • Undocumented

    Declaration

    Objective-C

    + (NSString *)fw_CSSStringWithColor:(UIColor *)color NS_REFINED_FOR_SWIFT;

  • Undocumented

    Declaration

    Objective-C

    + (NSString *)fw_CSSStringWithFont:(UIFont *)font NS_REFINED_FOR_SWIFT;