因为添加空白占位符，导致高度计算不对，尤其是在10个汉字的时候

[Coder-Miao]

不知道基于什么考虑，添加了这些代码 unichar spacingChar = 0xFFFC; NSString *spacingCharString = [NSString stringWithCharacters:&spacingChar length:1]; //空白占位符 NSAttributedString *placeholderStr = [[NSAttributedString alloc]initWithString:spacingCharString]; [str appendAttributedString:placeholderStr];