Objective c 未知类型名称'；学生控制员'；

我正在制作一个表视图应用程序，它将无法识别studentAddController.h中的studentController类型。我有一个以前的项目，我看了，不能找出为什么它不能识别类型名

以下是studentController.h中的代码

 #import <UIKit/UIKit.h>
 #import "studentCells.h"
 #import "AssignmentsController.h"
 #import "studentAddController.h"


 @interface studentController : UITableViewController {
    NSMutableArray *studentArray;
 }
 - (IBAction)addStudentButton:(id)sender;
 - (void)insertNewRow:(NSDictionary *)studentDictionary;
 @property (nonatomic, retain) UITableView *studentTableView;

 @end

#import <UIKit/UIKit.h>
#import "studentController.h"
#import "studentAddController.h"

@interface studentAddController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *firstNameField;
@property (weak, nonatomic) IBOutlet UITextField *lastNameField;

- (IBAction)doneButton:(id)sender;
- (IBAction)keyboardResign:(id)sender;

@property (nonatomic, strong) studentController *parentTableVC;

@end

#import <UIKit/UIKit.h>
#import "studentCells.h"
#import "AssignmentsController.h"

#import <UIKit/UIKit.h>
#import "studentController.h"

以下是studentAddController.h的代码

 #import <UIKit/UIKit.h>
 #import "studentCells.h"
 #import "AssignmentsController.h"
 #import "studentAddController.h"


 @interface studentController : UITableViewController {
    NSMutableArray *studentArray;
 }
 - (IBAction)addStudentButton:(id)sender;
 - (void)insertNewRow:(NSDictionary *)studentDictionary;
 @property (nonatomic, retain) UITableView *studentTableView;

 @end

#import <UIKit/UIKit.h>
#import "studentController.h"
#import "studentAddController.h"

@interface studentAddController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *firstNameField;
@property (weak, nonatomic) IBOutlet UITextField *lastNameField;

- (IBAction)doneButton:(id)sender;
- (IBAction)keyboardResign:(id)sender;

@property (nonatomic, strong) studentController *parentTableVC;

@end

#import <UIKit/UIKit.h>
#import "studentCells.h"
#import "AssignmentsController.h"

#import <UIKit/UIKit.h>
#import "studentController.h"

---

你有一个循环引用。在

studentController.h

中导入

studentAddController.h

，在

studentAddController.h

中导入

studentController.h

。尝试对标题进行以下更改：

学生控制员

 #import <UIKit/UIKit.h>
 #import "studentCells.h"
 #import "AssignmentsController.h"
 #import "studentAddController.h"


 @interface studentController : UITableViewController {
    NSMutableArray *studentArray;
 }
 - (IBAction)addStudentButton:(id)sender;
 - (void)insertNewRow:(NSDictionary *)studentDictionary;
 @property (nonatomic, retain) UITableView *studentTableView;

 @end

#import <UIKit/UIKit.h>
#import "studentController.h"
#import "studentAddController.h"

@interface studentAddController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *firstNameField;
@property (weak, nonatomic) IBOutlet UITextField *lastNameField;

- (IBAction)doneButton:(id)sender;
- (IBAction)keyboardResign:(id)sender;

@property (nonatomic, strong) studentController *parentTableVC;

@end

#import <UIKit/UIKit.h>
#import "studentCells.h"
#import "AssignmentsController.h"

#import <UIKit/UIKit.h>
#import "studentController.h"

studentAddController.h

 #import <UIKit/UIKit.h>
 #import "studentCells.h"
 #import "AssignmentsController.h"
 #import "studentAddController.h"


 @interface studentController : UITableViewController {
    NSMutableArray *studentArray;
 }
 - (IBAction)addStudentButton:(id)sender;
 - (void)insertNewRow:(NSDictionary *)studentDictionary;
 @property (nonatomic, retain) UITableView *studentTableView;

 @end

#import <UIKit/UIKit.h>
#import "studentController.h"
#import "studentAddController.h"

@interface studentAddController : UIViewController
@property (weak, nonatomic) IBOutlet UITextField *firstNameField;
@property (weak, nonatomic) IBOutlet UITextField *lastNameField;

- (IBAction)doneButton:(id)sender;
- (IBAction)keyboardResign:(id)sender;

@property (nonatomic, strong) studentController *parentTableVC;

@end

#import <UIKit/UIKit.h>
#import "studentCells.h"
#import "AssignmentsController.h"

#import <UIKit/UIKit.h>
#import "studentController.h"

#导入
#导入“studentController.h”

我还要注意的是，命名标准将规定您的类是PascalCase而不是camelCase。只有您的变量和方法应该是camelCase

我还要指出，您不需要在studentController.h中导入studentAddController，所以我将它移到了.m。如果您确实需要导入studentAddController，那么您将执行一个前向类声明以避免循环引用。像这样：

#import <UIKit/UIKit.h>
#import "studentCells.h"
#import "AssignmentsController.h"

@class studentAddController;

#导入
#导入“studentCells.h”
#导入“AssignmentsController.h”
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