Label 添加表情图片

// 添加表情

NSTextAttachment *attch = [[NSTextAttachment alloc] init];

// 表情图片

attch.image = [UIImage imageNamed:@"d_aini"];

// 设置图片大小

attch.bounds = CGRectMake(0, 0, 32, 32);

// 创建带有图片的富文本

NSAttributedString *string = [NSAttributedString attributedStringWithAttachment:attch];

[contentStr appendAttributedString:string];

contentLabel.attributedText = contentStr;