我正在使用状态恢复来恢复我的应用程序的先前视图和数据。当在第一个视图控制器中单击按钮时,我将推送第二个视图控件。在这种情况下,我能够恢复第二个视图控制器数据。但是如果在第一个视图中单击按钮时,我将第二个View Controller视图作为子视图添加到第一个视图控制器Controller,encodeRestorableStateWithCoder:和decodeRestorableStateWithCoder:未在第二个视图控制器中调用。无法恢复第二个视图控制器数据。我是否需要执行任何其他配置恢复子视图数据?
//Firstviewcontroller
-(IBAction)moveToNextViewController:(id)sender {
SecondVeiwController *sec_VC=[[SecondVeiwController alloc]initWithNibName:@"SecondVeiwController" bundle:[NSBundle mainBundle ]];
sec_VC.restorationIdentifier=@"SecondVeiwController";
[self.view addSubview:tab_cnt_1.view];
}
//Secondviewcontroller
-(id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
self.restorationIdentifier=@"Secondviewcontroller";
self.restorationClass=[self class];
}
return self;
}
+(UIViewController *)viewControllerWithRestorationIdentifierPath:(NSArray *)identifierComponents coder:(NSCoder *)coder
{
UIViewController * myViewController =
[[Secondviewcontroller alloc]
initWithNibName:@"Secondviewcontroller"
bundle:[NSBundle mainBundle]];
return myViewController;
}
答案 0 :(得分:0)
似乎iOS没有跟踪子视图,你必须对SecondViewController进行编码,然后解码并将其添加为子视图控制器,并将其视图作为子视图。
//FirstViewController
-(void)encodeRestorableStateWithCoder:(NSCoder *)coder {
[super encodeRestorableStateWithCoder:coder];
[coder encodeObject:self.childViewControllers[0] forKey:@"childVC"];
}
-(void)decodeRestorableStateWithCoder:(NSCoder *)coder {
[super decodeRestorableStateWithCoder:coder];
UIViewController *v = [coder decodeObjectForKey:@"childVC"];
[self addChildViewController:v];
[self.view addSubview:v.view];
}
//SecondViewController
-(void)encodeRestorableStateWithCoder:(NSCoder *)coder {
[super encodeRestorableStateWithCoder:coder];
[coder encodeObject:self.view.backgroundColor forKey:@"bgColor"];
}
-(void)decodeRestorableStateWithCoder:(NSCoder *)coder {
[super decodeRestorableStateWithCoder:coder];
UIColor *bgColor = [coder decodeObjectForKey:@"bgColor"];
[self.view setBackgroundColor:bgColor];
}