设置应用程序实现-布尔值设置为“否”默认情况下
这个问题本身意味着我的 Root.plist 文件中的 DefaultValue 属性被设置为“no”。不幸的是，事实并非如此。为了验证我的问题是什么，我尝试使用 iPhone 设置应用程序的一部分。我用它来显示/隐藏某些屏幕上的项目。默认情况下，“shown”属性设置为“on”。不幸的是，在用户进入设置应用程序、关闭选项然后再次打开它们之前，所有屏幕上的项目都被隐藏了！这是我的代码。
if ([prefs boolForKey:@"artwork_prefrence"] == YES)
currentArtwork.hidden = NO;
else if ([prefs boolForKey:@"artwork_prefrence"] == NO)
currentArtwork.hidden = YES;
if ([prefs boolForKey:@"title_prefrence"] == YES)
currentSong.hidden = NO;
else if ([prefs boolForKey:@"title_prefrence"] == NO)
currentSong.hidden = YES;
if ([prefs boolForKey:@"artist_prefrence"] == YES)
currentArtist.hidden = NO;
else if ([prefs boolForKey:@"artist_prefrence"] == NO)
currentArtist.hidden = YES;
if ([prefs boolForKey:@"next_prefrence"] == YES)
nextbutton.hidden = NO;
else if ([prefs boolForKey:@"next_prefrence"] == NO)
nextbutton.hidden = YES;
if ([prefs boolForKey:@"prev_prefrence"] == YES)
prevbutton.hidden = NO;
else if ([prefs boolForKey:@"prev_prefrence"] == NO)
prevbutton.hidden = YES;
if ([prefs boolForKey:@"progress_prefrence"] == YES)
progressslider.hidden = NO;
else if ([prefs boolForKey:@"progress_prefrence"] == NO)
progressslider.hidden = YES;
感谢任何和所有的帮助。提前致谢！
The question, by itself, implies that the DefaultValue property in my Root.plist file was set to "no". This is unfortunately not true. To verify what my problem is, I am trying to use a section of the iPhone's Settings application. I am using this to show/hide certain on-screen items. By default, the "shown" property was set to "on." Unfortunately, all of the on-screen items were hidden before the user went to the settings app, turned the options off, then turned them on again! Here is my code.
if ([prefs boolForKey:@"artwork_prefrence"] == YES)
currentArtwork.hidden = NO;
else if ([prefs boolForKey:@"artwork_prefrence"] == NO)
currentArtwork.hidden = YES;
if ([prefs boolForKey:@"title_prefrence"] == YES)
currentSong.hidden = NO;
else if ([prefs boolForKey:@"title_prefrence"] == NO)
currentSong.hidden = YES;
if ([prefs boolForKey:@"artist_prefrence"] == YES)
currentArtist.hidden = NO;
else if ([prefs boolForKey:@"artist_prefrence"] == NO)
currentArtist.hidden = YES;
if ([prefs boolForKey:@"next_prefrence"] == YES)
nextbutton.hidden = NO;
else if ([prefs boolForKey:@"next_prefrence"] == NO)
nextbutton.hidden = YES;
if ([prefs boolForKey:@"prev_prefrence"] == YES)
prevbutton.hidden = NO;
else if ([prefs boolForKey:@"prev_prefrence"] == NO)
prevbutton.hidden = YES;
if ([prefs boolForKey:@"progress_prefrence"] == YES)
progressslider.hidden = NO;
else if ([prefs boolForKey:@"progress_prefrence"] == NO)
progressslider.hidden = YES;
Any and all help is appreciated. Thanks in advance!
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您必须在应用程序委托的初始化方法中使用registerDefaults。
You have to use registerDefaults in your initialize-method in your App Delegate.