从NSTextAttachment中删除/删除UITextView

Question

我有一个UITextView，它将包含图像(如NSTextAttachment)和字符串。UITextView是不可选的，所以我可以使用：

- (BOOL)textView:(UITextView *)textView shouldInteractWithTextAttachment:(NSTextAttachment *)textAttachment inRange:(NSRange)characterRange 

如何删除方法中的textAttachment？

Answer 1

您可以使用replaceCharactersInRange:withString: of NSMutableAttributedString来删除攻击(您获得了作为UITextViewDelegate方法参数的范围)：

//Retrieve the attributed string
NSMutableAttributedString *mutableAttr = [[textView attributedText] mutableCopy];
//Remove the attachment
[mutableAttr replaceCharactersInRange:range withString:@""]; 
//Set the new attributed string
[textView setAttributedText:mutableAttr];