從另一個視圖控制器存儲數組值

Question

我有兩個視圖控制器（viewController和popUpViewController）。當我打開應用程序，viewController將加載。它有按鈕。當我點擊按鈕時，圖像將在popUpViewController中打開。然後我點擊popUpViewController上的關閉按鈕，我正在關閉popUpViewController。我的場景是，當我點擊viewController中的按鈕時，我必須打開時間，然後單擊關閉按鈕popUpViewController，我必須採取結束時間。兩者都應存儲在數組中。但數組顯示爲零。我正在使用下面的代碼。

viewController.m

viewDidLoad中：

fileOpenedValues = @[@"",@"" ,@""]; 
fileOpenedKeys = @[@"File Name",@"STime",@"ETime"]; 
fileOpened = [[NSMutableDictionary alloc] initWithObjects:fileOpenedValues forKeys:fileOpenedKeys]; 
[fileOpenedArr addObject:fileOpened]; 


-(void) storeArrayFromPopUp :(NSString *)fname second:(NSString *)mname third:(NSString *)lname 
{ 
fileOpenedValues = @[fname ,mname ,lname]; 
fileOpenedKeys = @[@"File Name",@"STime",@"ETime"]; 
fileOpened = [[NSMutableDictionary alloc] initWithObjects:fileOpenedValues forKeys:fileOpenedKeys];  
[fileOpenedArr addObject:fileOpened]; 
} 

popUpViewController.m

[baseObj storeArrayFromPopUp :openedFileName second:fileOpenStime third:fileOpenEtime]; 

調用storeArrayFromPopUp後。 fileOpenedArr顯示爲零。

請指教。

Answer 1

@implementation ViewController { 


     NSString *strStartTime; 
     NSString *strEndTime; 
     NSMutableArray *arrTime; 
    } 

    - (void)viewDidLoad { 
     [super viewDidLoad]; 

     arrTime = [[NSMutableArray alloc]init]; 
     strStartTime = @""; 
     strEndTime = @""; 
    } 

    -(void)viewWillAppear:(BOOL)animated { 

     //check start has value means popupview controller was open. 
     //viewWillAppear always call when you close the popup. 
     if (strStartTime.length > 0) { 
      strEndTime = [self getCurrentTime]; 

      NSDictionary *dic = [[NSDictionary alloc]initWithObjectsAndKeys:strStartTime,@"StartTime",strEndTime,@"EndTime", nil]; 
      [arrTime addObject:dic]; //you can have all the start and endtime details in the arrTime array. 
      strStartTime = @""; 
      strEndTime = @""; 
     } 
    } 

    -(IBAction)btnShowPopupClicked:(id)sender { 
     //Set the start time when popup is going to open. 
     strStartTime = [self getCurrentTime]; 
     [self performSegueWithIdentifier:@"imagePopup" sender:nil]; 

    } 

-(NSString *)getCurrentTime { 

    NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; 
    [dateFormatter setTimeStyle:NSDateFormatterMediumStyle]; 
    [dateFormatter setTimeZone:[NSTimeZone localTimeZone]]; 
    NSString *currentTime = [dateFormatter stringFromDate:[NSDate date]]; 

    return currentTime; 
}