1_页面跳转

#include "config.h"

TTGOClass *ttgo;

lv_obj_t* btn1,* btn2;
lv_obj_t* current_app_obj_user=NULL;
#define LV_DESKTOP  lv_disp_get_scr_act(NULL)
 
static void btn_event_handler(lv_obj_t * obj, lv_event_t event)
{
    lv_obj_t* parent_menu;
    if (event == LV_EVENT_CLICKED) {

        if (obj == btn1) {
            if (current_app_obj_user == NULL) {

                current_app_obj_user = lv_obj_create(LV_DESKTOP, NULL);
                lv_obj_set_size(current_app_obj_user, LV_HOR_RES_MAX, LV_VER_RES_MAX);
                parent_menu = current_app_obj_user;
 
                lv_obj_t* lable = lv_label_create(parent_menu, NULL);
                lv_label_set_text(lable, "lv_pages_2");
                lv_obj_align(lable, NULL, LV_ALIGN_CENTER, 0, -10);

                btn2 = lv_btn_create(parent_menu, NULL);
                lv_obj_t* label_btn = lv_label_create(btn2, NULL);
                lv_label_set_text(label_btn, "Back");
                lv_obj_align(btn2, lable, LV_ALIGN_OUT_BOTTOM_MID, 0, 20);
                lv_obj_set_event_cb(btn2, btn_event_handler);
            }
        }
        else if (obj == btn2) {
            lv_obj_del(current_app_obj_user);
            current_app_obj_user = NULL;
        }
    }
}
 
void lv_pages_1(void)
{

lv_obj_t* desktop = lv_obj_create(lv_disp_get_scr_act(NULL), NULL);
    lv_obj_set_size(desktop, LV_HOR_RES_MAX, LV_VER_RES_MAX);

    lv_obj_t* lable = lv_label_create(desktop, NULL);
    lv_label_set_text(lable, "lv_pages_1");
    lv_obj_align(lable, NULL, LV_ALIGN_CENTER, 0, 0);

    btn1 = lv_btn_create(desktop, NULL);
    lv_obj_t *label_btn = lv_label_create(btn1, NULL);
    lv_label_set_text(label_btn, "button");
    lv_obj_align(btn1, lable, LV_ALIGN_OUT_BOTTOM_MID, 0, 20);
    lv_obj_set_event_cb(btn1, btn_event_handler);

}



void setup()
{
    Serial.begin(115200);
    ttgo = TTGOClass::getWatch();
    ttgo->begin();
    ttgo->openBL();
    ttgo->lvgl_begin();
    lv_pages_1();

}

void loop()
{
    lv_task_handler();
    delay(5);
}

2_容器

#include "config.h"

TTGOClass *ttgo;

static lv_obj_t * label;

int text_value=0;

static void event_handler(lv_obj_t *obj, lv_event_t event)
{
    if (event == LV_EVENT_CLICKED) {
        lv_label_set_text_fmt(label, "%d",++text_value);
    }
}

void lv_ex_cont_1(void)
{
    lv_obj_t * cont;

    cont = lv_cont_create(lv_scr_act(), NULL);
    lv_obj_set_event_cb(cont, event_handler);
    lv_obj_set_auto_realign(cont, true);
    lv_obj_align_origo(cont, NULL, LV_ALIGN_CENTER, 0, 0);
    lv_cont_set_fit(cont, LV_FIT_TIGHT);
    lv_cont_set_layout(cont, LV_LAYOUT_COLUMN_MID);

    LV_IMG_DECLARE(wifi);

    lv_obj_t * img1 = lv_img_create(cont, NULL);
    lv_img_set_src(img1, &wifi);
    lv_obj_align(img1, NULL, LV_ALIGN_CENTER, 0,0);

    label = lv_label_create(cont, NULL);
    lv_label_set_text(label, "0");
    lv_obj_set_auto_realign(label, true);
    lv_obj_align(label,NULL,LV_ALIGN_CENTER, 0,-55);

}


void setup()
{
    Serial.begin(115200);
    ttgo = TTGOClass::getWatch();
    ttgo->begin();
    ttgo->openBL();
    ttgo->lvgl_begin();
    lv_ex_cont_1();
}

void loop()
{
    lv_task_handler();
    delay(5);
}

3_消息框

#include "config.h"

TTGOClass *ttgo;

static void event_handler(lv_obj_t *obj, lv_event_t event)
{
    if (event == LV_EVENT_CLICKED) {

    static const char * btns[] ={"Apply", "Close", ""};

    lv_obj_t * mbox1 = lv_msgbox_create(lv_scr_act(), NULL);
    lv_msgbox_set_text(mbox1, "A message box with two buttons.");
    lv_msgbox_add_btns(mbox1, btns);
    lv_obj_set_width(mbox1, 200);
    lv_obj_align(mbox1, NULL, LV_ALIGN_CENTER, 0, 0);
    }
}

void setup()
{
    Serial.begin(115200);
    ttgo = TTGOClass::getWatch();
    ttgo->begin();
    ttgo->openBL();
    ttgo->lvgl_begin();

    lv_obj_t *label;

    lv_obj_t *btn1 = lv_btn_create(lv_scr_act(), NULL);
    lv_obj_set_event_cb(btn1, event_handler);
    lv_obj_align(btn1, NULL, LV_ALIGN_CENTER, 0,40);

    label = lv_label_create(btn1, NULL);
    lv_label_set_text(label, "Button");

}

void loop()
{
    lv_task_handler();
    delay(5);
}