我有2個控制器,一個AssignmentViewController和一個UITableViewController。每當創建一個賦值並單擊保存的按鈕時,我需要將該賦值對象發送給我的UITableViewController(使用委託)。 TableView然後需要將其歸檔到NSMutableArray中的文件中(TableView必須對此應用進行歸檔/解除歸檔)。如何在帶有委託的TableView中存檔/取消存檔數據?
並且無論何時加載TableView,都需要將數組取消歸檔並將Homework對象顯示在表單元格中。
我已經啓動了代碼,但我不知道我在做什麼正確和不正確。
應用程序應按此順序工作。輸入賦值信息,然後按保存 - >使用委託將新的賦值對象發送到TableViewController - >將NSMutableArray中的對象歸檔到文件 - >每當表視圖在屏幕上時,在單元格中取消歸檔數組和顯示賦值對象。
以下是我有:
AssignmentViewController.h
@interface Assignment : UIViewController
<
UITextViewDelegate,
AssignmentTableControllerDelegate
//Error:Cannot find protocol declaration "AssignmentTableControllerDelegate"
>
@property(nonatomic) IBOutlet UITextField *ClassNameField;
@property(nonatomic) IBOutlet UILabel *ClassNameLabel;
@property(nonatomic) IBOutlet UITextField *AssignmentTitleField;
@property(nonatomic) IBOutlet UILabel *AssignmentTitleLabel;
@property (nonatomic, strong) Homework *homeworkAssignment;
- (IBAction)Save:(UIButton *)sender;
@end
AssignmentViewController.m
- (IBAction)Save:(UIButton *)sender {
self.homeworkAssignment = [[Homework alloc] init];
self.homeworkAssignment.className = self.ClassNameField.text;
self.homeworkAssignment.assignmentTitle = self.AssignmentTitleField.text;
//Sending info over to TableController
self.assignmentTableController.delegate= self;
self.assignmentTableController.homeworkInTable.className= self.ClassNameField.text;
self.assignmentTableController.homeworkInTable.assignmentTitle=self.AssignmentTitleField.text;
AssignmentTABLEController.h
#import "Assignment.h"
@protocol AssignmentTableControllerDelegate;
@interface AssignmentTableController : UITableViewController
@property (nonatomic, strong) Homework *homeworkInTable;
@property (nonatomic, assign) id <AssignmentTableControllerDelegate> delegate;
@property (nonatomic,strong) NSMutableArray *MyHomeworkArray;
-(IBAction)ArchiveData:(id)sender;
@end
@protocol AssignmentTableControllerDelegate <NSObject>
-(NSMutableArray *)UnarchiveData;
@end
Assignme ntTABLECONTROLLER.M(我所做的只是加這2種方法)
-(void)ArchiveData:(id)sender
{
[self.MyHomeworkArray addObject:self.homeworkInTable];
NSString *filePath = [self dataFilePath];//file created
//Archive my object
[NSKeyedArchiver archiveRootObject:self.MyHomeworkArray toFile:filePath];
}
-(NSMutableArray *)UnarchiveData
{
Homework *archivedHomework = [NSKeyedUnarchiver unarchiveObjectWithFile:filePath];
//Error:use of undeclared identifier:filePath^^
}
我是新來這個,所以我知道那裏有很多錯誤。我「認爲」我正在從AssignmentViewController正確傳遞信息,並帶有委派。但我確信我沒有正確存檔/解除存檔。我不知道如何分開存檔/解除存檔的代碼,然後顯示在表中。