目标c中的未知类型名称 [英] unknown type name in objective c

问题描述

我使用导航器编写了一个简单的程序，一切都正常运行。
然后我添加了几行代码（甚至不记得究竟是什么，似乎没有连接到问题）和问题发生。我试过ctrl + z，问题依然存在：

我运行该程序并得到这些错误：

  1。未知类型名称mainController
 2.具有retain（或strong）属性的属性必须为对象类型
  

而mainController是第一个要加载的屏幕。

这是appDelegate.h文件：

  #import< UIKit / UIKit.h> 
 #importmainController.h
 #importWishesList.h
 #importWish.h
 
 @interface AppDelegate：UIResponder&UIApplicationDelegate> 
 
 @property（强，非原子）UIWindow *窗口; 
 @property（强，非原子）IBOutlet UINavigationController * navController; 
 @property（strong，nonatomic）IBOutlet mainController * viewController; //这行创建错误
 @property（strong，nonatomic）WishesList * WishesArray; 
 @property（strong，nonatomic）NSIndexPath * temp; 
 
 @end 
  

这是appDelegate.m文件的相关部分：

   - （BOOL）应用程序：（UIApplication *）应用程序didFinishLaunchingWithOptions：（NSDictionary *）launchOptions 
 {
 self.window = [[UIWindow alloc] initWithFrame：[[UIScreen mainScreen] bounds]]; 
 WishesArray = [[WishesList alloc] init]; 
 temp = nil; 
 [self setViewController：[[mainController alloc] init]]; 
 [self setNavController：[[UINavigationController alloc] initWithRootViewController：self.viewController]]; 
 [self.window setRootViewController：navController]; 
 [self.window makeKeyAndVisible]; 
返回YES; 
} 
  

这是mainController.h：

  #import< UIKit / UIKit.h> 
 #importaddWishController.h
 #importdisplayWish.h
 #importWishesList.h
 #importWish.h
 
 @interface mainController：UIViewController 
 
 @property（nonatomic，weak）WishesList * list; 
 @property（nonatomic，strong）IBOutlet UITableView * wishTable; 
 
  - （void）addWish; 
 
 @end 
  

它已经工作了...

你能弄清楚吗？

谢谢

解决方案

这个问题发生在我一次。

我正在导入我的h文件中的APPDelegate.h，并在我的APPDelegate.h中导入文件（它应该是不是一个问题，但...）

我做了什么：我将导入从我自己的.h更改为.m，它的工作原理是：）

I'm pretty new to objective c, and having some basic problems.

I wrote a simple program using a navigator, and everything worked fine. then I added few lines of code (can't even remember what exactly, and it seems to have no connection to the problem) and the problem occurred. I tried ctrl+z, and the problem remained:

I run the program and get these errors:

1. unknown type name "mainController"
2. property with 'retain (or strong)' attribute must be of object type

while mainController is the first screen to be loaded.

This is the appDelegate.h file:

#import <UIKit/UIKit.h>
#import "mainController.h"
#import "WishesList.h"
#import "Wish.h"

@interface AppDelegate : UIResponder <UIApplicationDelegate>

@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) IBOutlet UINavigationController *navController;
@property (strong, nonatomic) IBOutlet mainController *viewController; // this line creates the errors
@property (strong, nonatomic) WishesList *WishesArray;
@property (strong, nonatomic) NSIndexPath *temp;

@end

this is the relevant part of the appDelegate.m file:

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:    (NSDictionary *)launchOptions
{
    self.window = [[UIWindow alloc]initWithFrame:[[UIScreen mainScreen]bounds]];
    WishesArray = [[WishesList alloc]init];
    temp = nil;
    [self setViewController:[[mainController alloc]init]];
    [self setNavController:[[UINavigationController alloc]initWithRootViewController:self.viewController]];
    [self.window setRootViewController:navController];
    [self.window makeKeyAndVisible];
    return YES;
}

And this is mainController.h:

#import <UIKit/UIKit.h>
#import "addWishController.h"
#import "displayWish.h"
#import "WishesList.h"
#import "Wish.h"

@interface mainController : UIViewController

@property (nonatomic, weak) WishesList *list;
@property (nonatomic, strong) IBOutlet UITableView *wishTable;

- (void)addWish;

@end

it already worked...
can you figure it out?

thanks

解决方案

This problem happen to me once.

I was importing the "APPDelegate.h" in my h file and in my APPDelegate.h I was importing the file too (it shouldn't be a problem but...)

What I did: I changed the Import from my own .h to .m and it worked :)

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