原本由于项目需求在 Linux 下学习过一段时间的 GTK+2.0 图形开发，时隔一段时间，想真正深入学习一下 GTK 。

这次直接从头学习 GTK+-3.0 ，并写下博文便于日后查看，也方便新手入门。

安装环境参考：

Arch    ：直接执行 sudo pacman -S gtk3 即可。

注意采用的是GTK3，上文中大部分是GTK2，注意同样的方式安装GTK3。

首先学习到的便是创建一个空白的窗口。我们创建一个名为 example.c 的源文件。内容如下

#include //每个GTK程序都要包含的头文件，里面申明了很多类型，函数原型等

static void activate (GtkApplication *app , gpointer data)

{

GtkWidget *window; //申明一个窗口

window = gtk_application_window_new(app); //为app创建一个窗口

gtk_window_set_title(GTK_WINDOW(window) , "Application"); //设置窗口的标题

gtk_window_set_default_size(GTK_WINDOW(window) , , ); //设置窗口默认大小为长宽各200像素

gtk_widget_show_all(window); //显示窗口

}

int main(int argc , char **argv) //主函数

{

GtkApplication *app; //申明创建一个 GtkApplicatin对象名为app

int app_status; //用于拿到app 运行结束后的返回值

app = gtk_application_new("org.rain.gtk" , G_APPLICATION_FLAGS_NONE); //创建一个application

g_signal_connect(app , "activate" , G_CALLBACK(activate) , NULL); //连接信号，初始化app时，调用 activate 函数

app_status = g_application_run(G_APPLICATION(app) , argc , argv); //运行app

g_object_unref(app); //销毁app

return app_status;

}

如下方式编译源文件，并执行生成的example可执行文件。

gcc example.c `pkg-config --cflags --libs gtk+-3.0` -Wall -o example

./example

运行结果如下：

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" 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