Question

我的界面中有一个按钮，在.h文件中声明

@interface UserProfileVC : UIViewController <UIImagePickerControllerDelegate>{
    IBOutlet UIButton *camera;
}
@property (nonatomic,retain) IBOutlet UIButton *camera;
-(IBAction)cameraPress:(id)sender;

在我的.m文件中，我有：

-(IBAction)cameraPress:(id)sender{
    UIImagePickerController *picker = [[UIImagePickerController alloc] init];
//  [picker setDelegate:self];
    [picker setAllowsEditing:YES];
    picker.sourceType = UIImagePickerControllerSourceTypeCamera;
    [self presentModalViewController:picker animated:YES];
    [picker release];
}

但我有这个错误：

*** -[UserProfileVC performSelector:withObject:withObject:]: message sent to deallocated instance 0x7bc2a40

有人能帮助我吗？我无法理解错误是什么。感谢

Answer 1

根据你上次评论的代码，

-(void)showDetails:(id)sender{ 
NSLog(@"Annotation Click"); 
details= [[UserProfileVC alloc] initWithNibName: @"Details" bundle:nil ]; 
details.Nome=note.title; 
addNavigationController = [[UINavigationController alloc] initWithRootViewController:details]; 
[self.navigationController presentModalViewController:addNavigationController animated:YES]; 
}

我可以建议你关注。如果您查看UIViewController类参考文档，您将在下面找到注释

presentModalViewController:animated:

呈现由给定视图控制器管理给用户的模态视图。（已弃用。请改用presentViewController:animated:completion:。）

所以我建议你使用presentViewController:animated:completion。我发现它与错误“发送到解除分配的实例的消息”无关，但仍然检查您是否可以解决您的问题。

我也不知道为什么你写这行

addNavigationController = [[UINavigationController alloc] initWithRootViewController:details];

如果您只想在当前UserProfileVC中显示UINavigationController，那么我建议您删除addNavigationController line＆amp;只写

[self.navigationController presentViewController:details animated:YES completion:NULL];

IBAction，按钮和相机

1 个答案: