我有一个使用 I tensorflow/core/common_runtime/simple_placer.cc:872] import/shuffle_batch/random_shuffle_queue: (RandomShuffleQueueV2)/job:localhost/replica:0/task:0/cpu:0
作为UI控件的应用。
现在我有NavigationView我可以在德语和英语之间更改UI的语言。
我使用以下代码更改语言：
SettingsPage最后一行调用public static void German()
{
Log.Logger.Information("Language = German")
ApplicationLanguages.PrimaryLanguageOverride = "de-DE";
DataCollection.Current.LanguageChangedEvent.LanguageChanged();
}
，EventHandler会在MainPage.xaml.cs所在的NavigationView上调用以下事件。
public void ChangedLanguage(object source, EventHandlerBase e)
{
if (e.GetStatus())
{
Windows.ApplicationModel.Resources.Core.ResourceContext.GetForCurrentView().Reset();
Windows.ApplicationModel.Resources.Core.ResourceContext.GetForViewIndependentUse().Reset();
Frame.Navigate(this.GetType());
ContentFrame.Navigate(typeof(SettingsPage));
}
}
因为我可以看到我只想在更改语言后将用户返回到SettingsPage。
但我总是回到我在启动应用程序时使用的初始HomePage。
我用于NavigationView的代码源自Microsoft提供的官方NavigationView sample。
有没有办法做到这一点？我能想象的唯一可能的事情是在第一页加载后设置一个标志，然后总是检查是否设置了该标志。但后来我遇到的问题是我仍然只能登陆SettingsPage，因为我必须将它作为旗帜检查的else目的地。
如果可能的话，我会非常感谢更有活力的方式：/
问候语， 丹尼尔
答案 0 :(得分：1)
NavigationView sample只是一个简单的代码示例供您参考。您需要根据您的要求进行一些更改。
我只想在更改语言后将用户返回到SettingsPage。但我总是回到我在启动应用程序时使用的初始主页。
我已经使用文档上的代码来制作用于测试的代码示例。有两个地方会引起你的问题。
首先，在#Escape The Dragon Game
import sys, time, random, math, pygame
from pygame.locals import *
class MySprite(pygame.sprite. Sprite):
def __init__ (self, target):
pygame.sprite.Sprite.__init__(self) #extend the base Sprite class
self.master_image = None
self.frame = 0
self.old_frame = -1
self.frame_width = 1
self.frame_height = 1
self.first_frame = 0
self.last_frame = 0
self.columns = 1
self.last_time = 0
#X property
def _getx(self): return self.rect.x
def _setx(self,value): self.rect.x = value
X = property(_getx, _setx)
#Y property
def _gety(self): return self.rect.y
def _sety(self,value): self.rect.y = value
Y = property(_gety,_sety)
#position property
def _getpos(self): return self.rect.topleft
def _setpos(self,pos): self.rect.topleft = pos
position = property(_getpos, _setpos)
def load(self, filename, width, height, columns):
self.master_image = pygame.image.load(filename).convert_alpha()
self.frame_width = width
self.frame_height = height
self.rect = Rect(0,0,width,height)
self.columns = columns
#try to auto-calculate total frames
rect = self.master_image.get_rect()
self.last_frame = (rect.width // width) * (rect.height // height) - 1
def update(self, current_time, rate=30):
#update animation frame number
if current_time > self.last_time + rate:
self.frame += 1
if self.frame > self.last_frame:
self.frame = self.first_frame
self.last_time = current_time
#build current frame only if it changed
if self.frame != self.old_frame:
frame_x = (self.frame % self.columns) * self.frame_width
frame_y = (self.frame // self.columns) * self.frame_height
rect = Rect(frame_x, frame_y, self.frame_width, self.frame_height)
self.image = self.master_image.subsurface(rect)
self.old_frame = self.frame
def __str__(self):
return str(self.frame) + "," + str(self.first_frame) + \
"," + str(self.last_frame) + "," + str(self.frame_width) + \
"," + str(self.frame_height) + "," + str(self.columns) + \
"," + str(self.rect)
def print_text(font, x, y, text, color=(255,255,255)):
imgText = font.render(text, True, color)
screen.blit(imgText, (x,y))
def reset_arrow():
y = random.randint(250,350)
arrow.position = 800,y
#main program begins
pygame.init()
screen = pygame.display.set_mode((800,600))
pygame.display.set_caption("Escape The Dragon Game")
font = pygame.font.Font(None, 18)
framerate = pygame.time.Clock()
#load bitmaps
bg = pygame.image.load("background.png").convert_alpha()
#create a sprite group
group = pygame.sprite.Group()
#create the dragon sprite
dragon = MySprite(screen)
dragon.load("dragon.png", 260, 150, 3)
dragon.position = 100, 230
group.add(dragon)
#create the player sprite
player = MySprite(screen)
player.load("caveman.png", 50, 64, 8)
player.first_frame = 1
player.last_frame = 7
player.position = 400, 303
group.add(player)
#create the arrow sprite
arrow = MySprite(screen)
arrow.load("flame.png", 40, 16, 1)
arrow.position = 800,320
group.add(arrow)
arrow_vel = 8.0
game_over = False
you_win = False
player_jumping = False
jump_vel = 0.0
player_start_y = player.Y
score = 0 ##improvement
#repeating loop
while True:
framerate.tick(30)
ticks = pygame.time.get_ticks()
for event in pygame.event.get():
if event.type == QUIT: sys.exit()
keys = pygame.key.get_pressed()
if keys[K_ESCAPE]: sys.exit()
elif keys[K_SPACE]:
if not player_jumping:
player_jumping = True
jump_vel = -8.0
#update the arrow
if not game_over:
arrow.X -= arrow_vel
if arrow.X < -40: reset_arrow()
#did arrow hit player?
if pygame.sprite.collide_rect(arrow,player):
reset_arrow()
player.X -= 10
#did arrow hit dragon?
if pygame.sprite.collide_rect(arrow, dragon):
reset_arrow()
player.X -= 10
score += 10 #improvement
#did dragon eat the player?
if pygame.sprite.collide_rect(player, dragon):
game_over = True
#did the dragon get defeated?
if dragon.X < -100:
you_win = True
game_over = True
#is the player jumping?
if player_jumping:
player.Y += jump_vel
jump_vel += 0.5
if player.Y > player_start_y:
player_jumping = False
player.Y = player_start_y
jump_vel = 0.0
#draw the background
screen.blit(bg, (0,0))
#update sprites
if not game_over:
group.update(ticks, 50)
#draw sprites
group.draw(screen)
print_text(font, 350, 560, "Press SPACE to jump!")
print_text(font, 10, 10, "Score: " + str(score)) ##improvement
if game_over:
print_text(font, 360, 100, "G A M E O V E R")
if you_win:
print_text(font, 330, 130, "YOU BEAT THE DRAGON!")
else:
print_text(font, 330, 130, "THE DRAGON GOT YOU")
pygame.display.update()
事件处理程序中，它始终将主页设置为所选项。但是当您更改语言时，您将重新导航到“MainPage”并使“ContentFrame”导航到“SettingsPage”。此时，将首先调用NavView_Loaded事件处理程序。然后，将调用On_Navigated事件处理程序。这就是为什么您的应用程序将始终返回主页的原因。
其次，如果已设置NavigationView的SelectedItem，则为事件。但是不会触发NavigationView的ItemInvoked event。所以，你看到的实际上不是主页，它是一个空白NavView_Loaded控件。您可以使用SelectionChanged event而不是ItemInvoked事件。为NavigationView的SelectedItem设置新值时，将触发SelectionChanged事件。请参阅以下示例：
Frame然后，让我们回到你原来的问题：
我可以想象在第一页加载后设置一个标志，然后总是检查是否设置了该标志。但后来我遇到的问题是我仍然只能登陆SettingsPage，因为我必须把它作为旗帜检查的其他目的地。
在我看来，旗帜不会影响你做其他事情。你完全可以定义几个标志。请参阅我的以下代码段以供参考：
private void NavView_SelectionChanged(NavigationView sender, NavigationViewSelectionChangedEventArgs args)
{
if (args.IsSettingsSelected)
{
ContentFrame.Navigate(typeof(SettingsPage));
}
else
{
NavView_Navigate(args.SelectedItem as NavigationViewItem);
}
}
在public static void German()
{
Log.Logger.Information("Language = German")
ApplicationLanguages.PrimaryLanguageOverride = "de-DE";
ApplicationData.Current.LocalSettings.Values["IsSwitchingLanguage"] = true;
DataCollection.Current.LanguageChangedEvent.LanguageChanged();
}
：
MainPage.xaml.cs在public void ChangedLanguage(object source, EventHandlerBase e)
{
if (e.GetStatus())
{
Windows.ApplicationModel.Resources.Core.ResourceContext.GetForCurrentView().Reset();
Windows.ApplicationModel.Resources.Core.ResourceContext.GetForViewIndependentUse().Reset();
Frame.Navigate(this.GetType());
}
}
事件处理程序中，我做了一些更改：
NavView_Loaded