我有2个控制器InitViewController和SettingsViewController。每个视图都有一个调用另一个视图的按钮:
InitViewController
@interface InitViewController : UIViewController
- (IBAction)loadSettings:(id)sender;
@end
@implementation InitViewController
- (IBAction)loadSettings:(id)sender {
SettingsViewController *vc = [[SettingsViewController alloc] initWithNibName:@"SettingsViewController" bundle:nil];
[self presentViewController:vc animated:YES completion:nil];
vc = nil;
}
@end
SettingsViewController
@interface SettingsViewController : UIViewController
- (IBAction)back:(id)sender;
@end
@implementation SettingsViewController
- (IBAction)back:(id)sender {
InitViewController *vc = [[InitViewController alloc] initWithNibName:@"InitViewController" bundle:nil];
[self presentViewController:vc animated:YES completion:nil];
vc = nil;
}
@end
当我分析应用程序并通过多次点击按钮测试它时,我看到InitViewController和SettingsViewController的实例仍然存在=>
我做错了什么?
答案 0 :(得分:5)
您的SettingsViewController
未返回创建它的InitViewController
。相反,它会创建一个新 InitViewController
实例,并提供该实例。因此,您最终会在InitViewController
和SettingsViewController
的实例之间交替使用一堆视图控制器。
由于您在呈现视频控制器后从不关闭任何类型的视图控制器,因此无法解除分配。
您的-[SettingsViewController back:]
行动应该解雇,而不是创建和展示新的InitViewController
。
@implementation SettingsViewController
- (IBAction)back:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}