为什么Xcode 7显示* .tbd而不是* .dylib？
Xcode 7在目标> BuildPhases>链接二进制库>点击+button
当select框架添加时，你不能find* .dylib，你会看到* .tbd。
这是什么原因？
**对于需要dylib的人，请从这篇文章开始
- select“添加其他”
- 一旦进入文件select窗口，执行“CMD”+ Shift + G（进入文件夹）并键入/ usr / lib /
- 从/ user / lib你可以find* .dylib文件
我search了谷歌，但目前为止唯一能find的就是苹果开发者论坛的以下引用 ：
对于那些好奇的人来说，.tbd文件是新的“基于文本的存根库”，它提供了一个在SDK中使用的存根库更加紧凑的版本，并有助于显着减less下载大小。
希望更多的文档即将推出。
更新
举个例子，这里是libsqlite3.tbd的全部内容。 这只是一个文本文件。 请注意，安装名称是libsqlite3.dylib 。
--- archs: [ armv7, armv7s, arm64 ] platform: ios install-name: /usr/lib/libsqlite3.dylib current-version: 216.4 compatibility-version: 9.0 exports: - archs: [ armv7, armv7s, arm64 ] symbols: [ __sqlite3_lockstate, __sqlite3_purgeEligiblePagerCacheMemory, __sqlite3_system_busy_handler, __sqlite_auto_profile, __sqlite_auto_profile_syslog, __sqlite_auto_trace, __sqlite_auto_trace_syslog, _sqlite3OsShmHasMultipleLinks, _sqlite3OsShmRenamedWhileOpen, _sqlite3OsShmWasTruncated, _sqlite3OsShmWasUnlinkedWhileOpen, _sqlite3VersionNumber, _sqlite3VersionString, _sqlite3_aggregate_context, _sqlite3_aggregate_count, _sqlite3_auto_extension, _sqlite3_backup_finish, _sqlite3_backup_init, _sqlite3_backup_pagecount, _sqlite3_backup_remaining, _sqlite3_backup_step, _sqlite3_bind_blob, _sqlite3_bind_blob64, _sqlite3_bind_double, _sqlite3_bind_int, _sqlite3_bind_int64, _sqlite3_bind_null, _sqlite3_bind_parameter_count, _sqlite3_bind_parameter_index, _sqlite3_bind_parameter_name, _sqlite3_bind_text, _sqlite3_bind_text16, _sqlite3_bind_text64, _sqlite3_bind_value, _sqlite3_bind_zeroblob, _sqlite3_blob_bytes, _sqlite3_blob_close, _sqlite3_blob_open, _sqlite3_blob_read, _sqlite3_blob_reopen, _sqlite3_blob_write, _sqlite3_busy_handler, _sqlite3_busy_timeout, _sqlite3_cancel_auto_extension, _sqlite3_changes, _sqlite3_clear_bindings, _sqlite3_close, _sqlite3_close_v2, _sqlite3_collation_needed, _sqlite3_collation_needed16, _sqlite3_column_blob, _sqlite3_column_bytes, _sqlite3_column_bytes16, _sqlite3_column_count, _sqlite3_column_decltype, _sqlite3_column_decltype16, _sqlite3_column_double, _sqlite3_column_int, _sqlite3_column_int64, _sqlite3_column_name, _sqlite3_column_name16, _sqlite3_column_text, _sqlite3_column_text16, _sqlite3_column_type, _sqlite3_column_value, _sqlite3_commit_hook, _sqlite3_compileoption_get, _sqlite3_compileoption_used, _sqlite3_complete, _sqlite3_complete16, _sqlite3_config, _sqlite3_context_db_handle, _sqlite3_create_collation, _sqlite3_create_collation16, _sqlite3_create_collation_v2, _sqlite3_create_function, _sqlite3_create_function16, _sqlite3_create_function_v2, _sqlite3_create_module, _sqlite3_create_module_v2, _sqlite3_data_count, _sqlite3_data_directory, _sqlite3_db_config, _sqlite3_db_filename, _sqlite3_db_handle, _sqlite3_db_mutex, _sqlite3_db_readonly, _sqlite3_db_release_memory, _sqlite3_db_status, _sqlite3_declare_vtab, _sqlite3_enable_shared_cache, _sqlite3_errcode, _sqlite3_errmsg, _sqlite3_errmsg16, _sqlite3_errstr, _sqlite3_exec, _sqlite3_expired, _sqlite3_extended_errcode, _sqlite3_extended_result_codes, _sqlite3_file_control, _sqlite3_finalize, _sqlite3_free, _sqlite3_free_table, _sqlite3_get_autocommit, _sqlite3_get_auxdata, _sqlite3_get_table, _sqlite3_global_recover, _sqlite3_initialize, _sqlite3_intarray_bind, _sqlite3_intarray_create, _sqlite3_interrupt, _sqlite3_last_insert_rowid, _sqlite3_libversion, _sqlite3_libversion_number, _sqlite3_limit, _sqlite3_log, _sqlite3_malloc, _sqlite3_malloc64, _sqlite3_memory_alarm, _sqlite3_memory_highwater, _sqlite3_memory_used, _sqlite3_mprintf, _sqlite3_msize, _sqlite3_mutex_alloc, _sqlite3_mutex_enter, _sqlite3_mutex_free, _sqlite3_mutex_leave, _sqlite3_mutex_try, _sqlite3_next_stmt, _sqlite3_open, _sqlite3_open16, _sqlite3_open_v2, _sqlite3_os_end, _sqlite3_os_init, _sqlite3_overload_function, _sqlite3_prepare, _sqlite3_prepare16, _sqlite3_prepare16_v2, _sqlite3_prepare_v2, _sqlite3_profile, _sqlite3_progress_handler, _sqlite3_randomness, _sqlite3_realloc, _sqlite3_realloc64, _sqlite3_release_memory, _sqlite3_reset, _sqlite3_reset_auto_extension, _sqlite3_result_blob, _sqlite3_result_blob64, _sqlite3_result_double, _sqlite3_result_error, _sqlite3_result_error16, _sqlite3_result_error_code, _sqlite3_result_error_nomem, _sqlite3_result_error_toobig, _sqlite3_result_int, _sqlite3_result_int64, _sqlite3_result_null, _sqlite3_result_text, _sqlite3_result_text16, _sqlite3_result_text16be, _sqlite3_result_text16le, _sqlite3_result_text64, _sqlite3_result_value, _sqlite3_result_zeroblob, _sqlite3_rollback_hook, _sqlite3_rtree_geometry_callback, _sqlite3_rtree_query_callback, _sqlite3_set_authorizer, _sqlite3_set_auxdata, _sqlite3_shutdown, _sqlite3_sleep, _sqlite3_snprintf, _sqlite3_soft_heap_limit, _sqlite3_soft_heap_limit64, _sqlite3_sourceid, _sqlite3_sql, _sqlite3_status, _sqlite3_status64, _sqlite3_step, _sqlite3_stmt_busy, _sqlite3_stmt_readonly, _sqlite3_stmt_status, _sqlite3_strglob, _sqlite3_stricmp, _sqlite3_strnicmp, _sqlite3_table_column_metadata, _sqlite3_temp_directory, _sqlite3_test_control, _sqlite3_thread_cleanup, _sqlite3_threadsafe, _sqlite3_total_changes, _sqlite3_trace, _sqlite3_transfer_bindings, _sqlite3_update_hook, _sqlite3_uri_boolean, _sqlite3_uri_int64, _sqlite3_uri_parameter, _sqlite3_user_data, _sqlite3_value_blob, _sqlite3_value_bytes, _sqlite3_value_bytes16, _sqlite3_value_double, _sqlite3_value_int, _sqlite3_value_int64, _sqlite3_value_numeric_type, _sqlite3_value_text, _sqlite3_value_text16, _sqlite3_value_text16be, _sqlite3_value_text16le, _sqlite3_value_type, _sqlite3_version, _sqlite3_vfs_find, _sqlite3_vfs_register, _sqlite3_vfs_unregister, _sqlite3_vmprintf, _sqlite3_vsnprintf, _sqlite3_vtab_config, _sqlite3_vtab_on_conflict, _sqlite3_wal_autocheckpoint, _sqlite3_wal_checkpoint, _sqlite3_wal_checkpoint_v2, _sqlite3_wal_hook ] ... 我发现这个和其他.tbd文件
Applications/Xcode.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/SDKs/iPhoneOS.sdk/usr/lib/
如果您转到Xcode项目的“常规”选项卡，然后在“链接的框架和库”下添加库，也可以看到.tbd文件。 .tbd文件将被复制到您的项目。
所以看起来.dylib文件是您的项目正在使用的二进制代码的实际库，位于用户设备的/ usr / lib /目录中。 另一方面，.tbd文件只是包含在项目中的文本文件，可用作所需.dylib二进制文件的链接。 由于这个文本文件比二进制库小得多，所以它使得SDK的下载量变小了。
在这一点上，我只能从所给的信息中猜测，所以如果我错了，请纠正我。
.dylib是包含机器码的编译二进制文件。 .tbd是一个较小的文本文件，类似于跨平台模块映射。
