-2

小石のウォッチフェイスを作り始めたばかりで、カウントダウンタイマーを作りたいと思っています。これは、1日の残り時間を数えて、毎日午前12時に再開できます。

問題は、現在の時刻から 24 時間を引いて時計に表示する方法 (H:M のような時間と分を含む) を表示する方法がわかりません。

// Time functions
static void update_time() {
  // Get a tm structure
  time_t temp = time(NULL); 
  struct tm *tick_time = localtime(&temp);
double munistime;
  // Create a long-lived buffer
  static char buffer[] = "00:00:00";

  // Write the current hours and minutes into the buffer
  if(clock_is_24h_style() == true) {
    // Use 24 hour format
    strftime(buffer, sizeof("00:00:00"), "%H:%M:%S", tick_time);
    munistime = 24.0 - 19.0;

  } else {
    // Use 12 hour format
    strftime(buffer, sizeof("00:00:00"), "%I:%M:%S", tick_time);
  }

  // Display this time on the TextLayer
  text_layer_set_text(s_time_layer, buffer);
}

static void tick_handler(struct tm *tick_time, TimeUnits units_changed) {
 update_time();
}
// Set the count from the start of the day
Static void update_countdown () {


}

    // Window Functions
    static void main_window_load(Window *window) {
   // Create time TextLayer
  s_time_layer = text_layer_create(GRect(0, 130, 150,50));
  text_layer_set_background_color(s_time_layer, GColorClear);
  text_layer_set_text_color(s_time_layer, GColorBlack);
  text_layer_set_text(s_time_layer, "00:00:00");
  // Improve the layout to be more like a watchface
  text_layer_set_font(s_time_layer, fonts_get_system_font(FONT_KEY_BITHAM_30_BLACK));
  text_layer_set_text_alignment(s_time_layer, GTextAlignmentCenter);


  // Creates A count Timer Layer
  s_countdown_layer = text_layer_create(GRect(0, 40, 150, 50));
  text_layer_set_background_color(s_countdown_layer, GColorBlack);
  text_layer_set_text_color(s_countdown_layer, GColorWhite);
  text_layer_set_text(s_countdown_layer, "00:00:00");
  text_layer_set_text_alignment(s_countdown_layer, GTextAlignmentCenter);
  text_layer_set_font(s_countdown_layer,fonts_get_system_font(FONT_KEY_GOTHIC_28));


  // Add it as a child layer to the Window's root layer
  layer_add_child(window_get_root_layer(window), text_layer_get_layer(s_time_layer));
  layer_add_child(window_get_root_layer(window),text_layer_get_layer(s_countdown_layer));
   update_time();
}
4

2 に答える 2

0

時間、分、秒の 3 つの変数で tick_time を取得します。それらの新しい値を計算し、表示するためにバッファに保存します。

于 2015-01-13T13:53:06.717 に答える