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90 lines
1.8 KiB
Markdown
90 lines
1.8 KiB
Markdown
# AWTK 应用程序的入口
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## 一、背景
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虽然 main 函数是 C 语言的标准入口，但是不同平台的入口函数仍然有多种不同的形式。比如：
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* 嵌入式系统用 gui\_app\_start
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* ios/android 用 SDL\_main
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* Linux/MacOS 用 main
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* Windows 用 wWinMain
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如果希望开发的程序要在多个平台上运行，就需要处理多种入口函数。为了简化这个过程，AWTK 把入口函数的处理封装到 awtk_main.inc 中，开发者只需要 include 进来即可。
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## 二、基本用法
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* 实现 application_init 函数
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```c
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ret_t application_init() {
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/*do sth.*/
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return RET_OK;
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}
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```
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* 实现 application_exit 函数
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```c
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ret_t application_exit() {
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log_debug("application_exit\n");
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return RET_OK;
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}
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```
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* 包含 awtk_main.inc
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```c
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#include "awtk_main.inc"
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```
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> 请参考[完整的例子](https://github.com/zlgopen/awtk-c-demos/blob/master/demos/button.c)
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## 三、高级用法
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* 指定APP TYPE和窗口大小
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```c
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#define LCD_WIDTH 800
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#define LCD_HEGHT 600
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#define AWTK_APP_TYPE APP_DESKTOP
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#include "awtk_main.inc"
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```
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> 请参考[完整的例子](https://github.com/zlgopen/awtk/blob/master/demos/demo_desktop.c)
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* 处理命令行参数
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```c
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static ret_t on_cmd_line(int argc, char* argv[]) {
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script_file = argc == 2 ? argv[1] : "./demos/demoui.js";
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return RET_OK;
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}
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#define ON_CMD_LINE on_cmd_line
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#include "awtk_main.inc"
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```
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> 请参考[完整的例子](https://github.com/zlgopen/awtk-jerryscript/blob/master/src/c/main.c)
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* 指定应用程序的名称
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```c
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#define APP_NAME "AWTK-JS"
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#include "awtk_main.inc"
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```
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* 指定缺省字体
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```c
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#define APP_DEFAULT_FONT "default_full"
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#include "awtk_main.inc"
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```
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> 请参考[完整的例子](https://github.com/zlgopen/awtk-jerryscript/blob/master/src/c/main.c)
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