在c中创建按钮数组gtk [英] Creating array of buttons gtk in c

问题描述

我需要在 C 中创建按钮数组.我不确定我缺少什么，请帮助我.这是我的数组:

I need to create array of buttons in C. I am not sure what am I missing, please help me. Here is my array:

GtkWidget *button[5];
int i;
for ( i =1; i<5; i++)
        button[i] = gtk_button_new();

然后我创建其余的按钮...我正在使用 button [i] 然后最后我这样做 i++; 这可能不是最好的方式，但我只是不确定当我创建数组时，如何在我的其余语句中传递按钮 1、按钮 2 等?请任何帮助表示赞赏.p.s.我是 C 新手，不要对我苛刻，ty:)

Then I creating the rest of the buttons... I am using button [i] and then at the end i do this i++; This probably not the best way, but i am just not sure when I create the array, how do I pass button 1, button 2 and etc in the rest of my statements? Please any help appreciated. p.s. I am new in C, dont be harsh on me, ty:)

 /* Creates a new button with the label "Button 1". */
button[i] = gtk_button_new_with_label ("Button 1");

/* Now when the button is clicked, we call the "callback" function
 * with a pointer to "button 1" as its argiument */
g_signal_connect (button[i], "clicked",
                  G_CALLBACK (callback), "Run button 1");

/* Instead of gtk_container_add, we pack this button into the invisible
 * box, which has been packed into the window. */
gtk_box_pack_start (GTK_BOX (box1), button[i], TRUE, TRUE, 0);

/* Always remember this step, this tells GTK that our preparation for
 * this button is complete, and it can now be displayed. */
gtk_widget_show (button[i]);
i++;

推荐答案

您的 for 循环以索引变量 (i) 为 1 开始，但是在计算机内存中，您声明的按钮数组的索引

your for loop starts with an index variable (i) of 1 however in the computer's memory the index to the array of buttons that you declared with

GtkWidget *button[5];

GtkWidget *button[5];

从索引 0 (i = 0) 开始因此，例如，您的代码应类似于:

starts with an index of 0 (i = 0) so for example your code should look something like:

GtkWidget *button[5];
//not necessary since c99 can declare inside for() e.g for(int i = 0; i < 5; i++)
int i;
for(i = 0; i < 5; i++)
{
    button[i] = gtk_button_new();
}
//do other stuff

然后要使用按钮，只需像访问常规数组一样访问它们，例如:

then to use the buttons just access them like you would a regular array eg:

 button[0] = gtk_button_new_with_label("button 1");

你不需要在 for 循环中使用 i++，因为 for 循环会在每次循环后自动递增迭代器(i 变量)(这就是 for(i = 0; i < 5; 末尾的 i++)i++) 确实)

you do not need the i++ inside of the for loop because the for loop automatically increments the iterator (i variable) after every loop (this is what the i++ at the end of for(i = 0; i < 5; i++) does)

这篇关于在c中创建按钮数组gtk的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！