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我想按照這個例子的代碼:iOS 6: How do I restrict some views to portrait and allow others to rotate?的iOS NSInvalidArgumentException:無法識別的選擇發送到實例
我創建的UINavigationController的一個子類,稱爲customNavigationController:
customNavigationController.m
@implementation CustomNavigationController
- (BOOL)shouldAutorotate
{
return YES;
}
- (NSUInteger)supportedInterfaceOrientations
{
if (self.landscapeOK) {
NSLog(@"all orientation ok");
return UIInterfaceOrientationMaskAllButUpsideDown;
}
NSLog(@"only portrait orientation");
return UIInterfaceOrientationMaskPortrait;
}
@end
CustomNavigationController.h
@interface CustomNavigationController : UINavigationController
@property (nonatomic) BOOL landscapeOK;
@end
然後在我的應用程序,我嘗試在viewWillAppear中設置landscapeOK屬性:
-(void)viewWillAppear:(BOOL)animated{
[super viewWillAppear:YES];
[(CustomNavigationController*)[self navigationController] setLandscapeOK:NO];
}
當我運行[(CustomNavigationController*)[self navigationController] setLandscapeOK:NO];
我得到的錯誤
*** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[UINavigationController setLandscapeOK:]: unrecognized selector sent to instance 0x10091ee00'
我在做什麼錯誤?
您需要實際創建一個'CustomNavigationController'而不是'UINavigationController'來創建它,您不能僅僅施放一些東西並讓它神奇地改變類型。 – dan
@丹你能解釋一下,那看起來與我所做的不一樣嗎? – scientiffic
這將取決於你在哪裏創建它。如果您在故事板中創建它,那麼您應該選擇導航控制器並在身份檢查器中設置一個自定義類。如果你在代碼中創建它,然後將'[UINavigationController alloc]'更改爲'[CustomNavigationController alloc]' – dan