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如何从指定NSAttributedString的 a中获取 a ?我似乎找不到任何关于此的示例或文档资源。UITextViewUITextRange
NSAttributedString
UITextView
UITextRange
没关系,我找到了它:
- (id)attribute:(NSString *)attributeName atIndex:(NSUInteger)index effectiveRange:(NSRangePointer)aRange