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
当我对应用程序进行性能分析并通过多次点击按钮对其进行测试时,我看到InitViewController和SettingsViewController的实例仍然存在=>
我究竟做错了什么?
最佳答案
您的SettingsViewController
不会返回到创建它的InitViewController
。相反,它将创建一个InitViewController
的新实例,并将其呈现出来。因此,您最终得到了一堆视图控制器,它们在InitViewController
和SettingsViewController
实例之间交替。
由于您在展示任何类型的视图控制器后都不会将其关闭,因此无法释放它们。
您的-[SettingsViewController back:]
操作应自行关闭,而不是创建和呈现新的InitViewController
。
@implementation SettingsViewController
- (IBAction)back:(id)sender {
[self dismissViewControllerAnimated:YES completion:nil];
}
关于ios - 没有释放 View Controller ,我们在Stack Overflow上找到一个类似的问题:https://stackoverflow.com/questions/13500702/