[iOS] NSTextAttachment示例

    NSTextAttachment *imageAttachment = [[NSTextAttachment alloc] init];
    imageAttachment.image = image;
    imageAttachment.bounds = CGRectMake(0, 0, 30, 30);
    NSDictionary *imageAttributes = @{NSAttachmentAttributeName:imageAttachment};
    NSAttributedString *imageAttStr = [[NSAttributedString alloc] initWithString:@"" attributes:imageAttributes];