将NSMutableArray传递给另一个视图控制器

Question

我试图在两个视图控制器之间传递NSMutableArray。请让我知道我能为此做些什么

在PlaylistViewController.h文件中我有

NSMutableArray *SongArray;
@property(nonatomic,retain)NSMutableArray *SongArray;

我希望传递给另一个视图控制器

Answer 1

您可以通过两种方式分享：

1. 使用属性

示例

在 .h 文件

中

    @interface ABCController : UIViewController
    {
        NSMutableArray *detailArray;
    }
    @property(nonatomic,retain)NSMutableArray *detailArray;

在 .m 文件

中

    XYZController *xyzVC = [[XYZController alloc] initWithNibName:@"XYZController" bundle:nil];    
    xyzVC.detailArray = self.detailArray;

    [self.navigationController pushViewCsecondView:xyzVC animated:YES];


    **XYZController.h**

    @interface XYZController : UIViewController
    {
        NSMutableArray *detailArray;
    }

@property(nonatomic,retain)NSMutableArray *detailArray;

1. 使用NSUserDefaults

示例

     [[NSUserDefaults standardUserDefaults] setValue:SongArray forKey:@"songArray"];
     [[NSUserDefaults standardUserDefaults] synchronize];

     NSMutableArray *arr = [[NSUserDefaults standardUserDefaults] valueForKey:@"songArray"];

Answer 2

**FirstViewController.h**

@interface FirstViewController : UIViewController
{
    NSMutableArray *SongArray;
}
@property(nonatomic,retain)NSMutableArray *SongArray;

**FirstViewController.m**

SecondViewController *secondView = [[SecondViewController alloc] initWithNibName:@"SecondViewController" bundle:nil];    
secondView.SongArray = self.SongArray;

[self.navigationController secondView animated:YES];


**SecondViewController.h**

@interface SecondViewController : UIViewController
{
    NSMutableArray *SongArray;
}
@property(nonatomic,retain)NSMutableArray *SongArray;

Answer 3

假设您要从其他视图控制器传递NSMutableArray到PlaylistViewController，请说viewcontroller。m然后在视图controller.m中执行以下操作

PlaylistViewController *play=[[PlaylistViewController alloc]initwithnibname:@"PlaylistViewController"];

play.SongArray=arrayofSongsWhichYouWantToPass;

[self.navigationController pushViewController:play animated:YES];

Answer 4

您可以将要传递数组的视图控制器设置为原始视图控制器的委托（在您的情况下为PlaylistViewController）

**OriginViewController.h**

@protocol OriginViewControllerDelegate {
-(void)passMutableArray:(NSMutableArray*)array;
}

@interface OriginViewController : UIViewController

@property(nonatomic,retain)id<OriginViewControllerDelegate> delegate;
@property(nonatomic,retain)NSMutableArray *array;

**OriginViewController.m**

//set DestinationViewController as delegate to OriginViewController(not necessarily in OriginViewController.m
//When you want to pass array just send message to delegate
[self.delegate passMutableArray:array];

**DestinationViewController.h**

@interface DestinationViewController : UIViewController <OriginViewControllerDelegate>
//implement protocol function in your m file

**DestinationViewController.m**

-(void)passMutableArray:(NSMutableArray*)array {
//Do whatever you want with the array
}

Answer 5

制作NSMutableArray的财产并合成它。

这是在你的班级成为对象之后。

PlaylistViewController *PLVC = [[PlaylistViewController alloc] init];
PLVC.SongArray=yourAry;
[self.navigationController pushViewController:PLVC animated:YES];

Answer 6

在secondViewController中创建一个NSMutableArray属性secondMutArray。 在firstViewController中，你要传递mutablearray，在那里创建第二个viewcontroller＆amp;的实例。将self.mutableArray分配给secondMutArray。 像这样

SecondViewController *secondViewController=[[SecondViewController alloc]init];
secondViewController.secondMutArray=self.mutableArray