我有这个自定义后退按钮:
- (IBAction)backToMenu:(id)sender {
[self.presentingViewController dismissModalViewControllerAnimated:YES];
}
在iOS 6模拟器中测试我的应用程序说不推荐使用dismissModalViewControllerAnimated,我必须使用dismissViewControllerAnimated,因此,我如何使用iOS 6代码并回退到iOS 5
我试过这个:
if([self respondsToSelector:@selector(presentingViewController:animated:completion:)])
[self.presentingViewController dismissViewControllerAnimated:(YES) completion:nil];
else if([self respondsToSelector:@selector(presentingViewController:animated:)])
[self.presentingViewController dismissModalViewControllerAnimated:YES];
else
NSLog(@"Oooops, what system is this ?!!! - should never see this !");
但是如果没有结果,我会看到NSLog并且没有任何视图被驳回,任何提示?
提前谢谢。
答案 0 :(得分:6)
您正在测试的选择器与您正在调用的选择器不同。请尝试以下方法:
if([self.presentingViewController respondsToSelector:@selector(dismissViewControllerAnimated:completion:)])
[self.presentingViewController dismissViewControllerAnimated:(YES) completion:nil];
else if([self.presentingViewController respondsToSelector:@selector(dismissModalViewControllerAnimated:)])
[self.presentingViewController dismissModalViewControllerAnimated:YES];
else
NSLog(@"Oooops, what system is this ?!!! - should never see this !");
重要的区别在于,您调用的对象< - em> - self.presentingViewController
(在本例中)与您在该对象上调用的方法不同。我们将后者称为选择器,这就是你要放在@selector()
包装器中的位。
答案 1 :(得分:5)
使用[self dismissViewControllerAnimated:YES completion:Nil];对于iOS 6