是否可以从 AppDelegate 获取 NSArray？

Question

是否可以从我的 AppDelegate 获取 NSArray？我需要向其他类发送一个数组。该数组是在我的 AppDelegate 中生成的。谢谢！

Answer 1

AppDelegate *appDelegate = (AppDelegate *)[[UIApplication sharedApplication] delegate];

现在您可以使用任何属性或以下方法：

[appDelegate myProperty] 或 [appDelegate myMethod]

希望对您有所帮助

Answer 2

首先你必须 alloc 和 init 在 AppDelegate.h 文件中

@property(nonatomic,retain)NSArray *books;

在 AppDelegate.m 中归档您的数组，然后您可以在其中添加对象。

_books = [[NSArray alloc]initWithObjects:@"test",@"test", nil];

您应该像这样在 BooksDetailViewController 中创建 AppDelegate 实例，

在 .h 文件中

AppDelegate *appDelegate;

在 .m 文件中

appDelegate  = (AppDelegate*)[UIApplication sharedApplication].delegate;

现在您可以像这样访问数组了，

NSLog(@"Test Log :%@",appDelegate.books);

输出：

2016-07-14 13:04:08.211 Gridz[2490:39240] Test Log :(
test,
test
)

Answer 3

可以从 AppDelegate 获取 NSArray 到其他类。

AppDelegate.h

#import <UIKit/UIKit.h>
@interface AppDelegate : UIResponder <UIApplicationDelegate> {

}
@property (nonatomic, strong) UIWindow *window;
@property (nonatomic, strong) ViewController *viewController; //For Xib
@property (nonatomic, strong) NSArray *arrayObjects;
@end

AppDelegate.m

#import "AppDelegate.h"
#import "ViewController.h"
@implementation AppDelegate
@synthesize arrayObjects;

因为我用的是Xib，我在下面设置了root view controller method.If你用stroy board，添加NSArray对象就可以了only.Don不需要设置root view controller。

//For XIB
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
   arrayObjects = [[NSArray alloc]initWithObjects:@"Steve",@"jobs",@"Tim",@"Cook",nil];
   self.window = [[UIWindow alloc] initWithFrame:[[UIScreen mainScreen] bounds]];
   // Override point for customization after application launch.
   self.viewController = [[ViewController alloc] initWithNibName:@"ViewController" bundle:nil];
   UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:self.viewController];
   self.window.rootViewController = navController;
   [navController setNavigationBarHidden:YES];
   [self.window makeKeyAndVisible];
   return YES;
}
//For Storyboard
- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
   arrayObjects = [[NSArray alloc]initWithObjects:@"Steve",@"jobs",@"Tim",@"Cook",nil];
   return YES;
}

然后在ViewController.m

您还可以在 ViewController.m

中导入 AppDelegate

#import "ViewController.h"
#import "AppDelegate.h"

@interface ViewController ()

@end

@implementation ViewController

现在在 viewDidLoad 方法中

- (void)viewDidLoad
{
   [super viewDidLoad];
   // Do any additional setup after loading the view, typically from a nib.
    AppDelegate *delegate = (AppDelegate*)[[UIApplication sharedApplication] delegate];
    NSLog(@"The app delegate NSArray Objects are - %@",delegate.arrayObjects);
}

NSLog 结果是

The app delegate NSArray Objects are - (
Steve,
jobs,
Tim,
Cook
)

是否可以从 AppDelegate 获取 NSArray？

Is it possible to get a NSArray from AppDelegate?

objective-c

appdelegate