升级必要性：
1、编译错:DT_TOOLCHAIN_DIR cannot be used to evaluate LIBRARY_SEARCH_PATHS, use TOOLCHAIN_DIR instead
检查各工程和 lib 工程的LIBRARY_SEARCH_PATHS：DT_TOOLCHAIN_DIR废弃了，改成TOOLCHAIN_DIR代替。
2、FontAtlas.cpp报错
No matching function for call to ‘iconv’ No matching function for call to ‘iconv_close’
//iconv(_iconv, (char**)&pin, &inLen, &pout, &outLen);
iconv((iconv_t)_iconv, (char**)&pin, &inLen, &pout, &outLen);//ios17的库中，iconv需要一个iconv_t类型的参数
//iconv_close(_iconv);
iconv_close((iconv_t)_iconv);//ios17的库中，iconv_close需要一个iconv_t类型的参数
另一种思路是：删掉 platform 里的 ios17，下载 ios16+ 版本
3、Assertion failed: (false && "compact unwind compressed function offset doesn't fit in 24 bits"), function operator(), file Layout.cpp, line 5758.
Xcode 15 beat6 Assertion failed: … | Apple Developer Forums
添加 Other Linker Flags：-ld64
