我在文档中读到，@property(nonatomic,copy)NSString*restorationIdentifier能够保留UIImageView属性的状态，例如位置、角度、等我尝试添加方法-(BOOL)application:(UIApplication*)applicationshouldRestoreApplicationState:(NSCoder*)coder{returnYES;}-(BOOL)application:(UIApplication*)applicationshouldSaveApplicationState:(NSCoder*)coder{retu

我在xib中有uiButtons。我已经为它们全部设置了恢复ID。我需要打印这些恢复ID的列表。为此，我在viewDidload中调用以下代码:-(void)loadViewFromNIB:(NSString*)nibNameowner:(id)owner{NSArray*objects=[[NSBundlemainBundle]loadNibNamed:nibNameowner:owneroptions:nil];NSArray*subviews=[[objectsobjectAtIndex:0]subviews];for(idkeyinsubviews){[keyaddTarget