问题描述
我想使用我的AppDelegate来存储一个对象，任何其他类都可以访问。我已经声明这个AppDelegate像这样：
I would like to use my AppDelegate to store a object which will be accessible to any other classes. I've declared this AppDelegate like this :
@interface MyAppDelegate : UIResponder <UIApplicationDelegate>
{
MyClass *tracker;
}
@property (strong, nonatomic) UIWindow *window;
@property (strong, nonatomic) ICViewController *viewController;
@property (retain, nonatomic) MyClass *tracker;
@end
我合成跟踪器和应用程序：didFinishLaunchingWithOptions：i set该对象中的一个NSString类似于：
I synthesize tracker and in application:didFinishLaunchingWithOptions: i set one NSString in that object like this :
self.tracker = [[MyClass alloc] init];
self.tracker.testGlobal = @"global funguje";
当我需要在其他类别的地方访问tracker时，使用这个代码：
When i need to access tracker somewhere else in some other class i use this code :
MyAppDelegate *appDelegate = (MyAppDelegate *)[[UIApplication sharedApplication] delegate];
MyClass *trackerTEST = appDelegate.tracker;
NSLog(@"TEST : %@",trackerTEST.testGlobal);
问题是testGlobal是NULL。我做错了什么？这里还有MyClass的类文件：
The problem is that testGlobal is NULL. What am I doing wrong? Also here are class files for MyClass :
@interface MyClass : NSObject
{
NSString *testGlobal;
}
@property (retain, nonatomic) NSString *testGlobal;
@end
@implementation MyClass
@synthesize testGlobal = _testGlobal;
@end
感谢您的任何帮助！
推荐答案
检查应用程序：didFinishLaunchingWithOptions：是否正在通过添加 NSLog @...）。如果 trackerTEST 为nil，则可能无法正确初始化。
Check if application:didFinishLaunchingWithOptions: is being called by adding a NSLog(@"..."). If trackerTEST is nil, it was possibly not correctly initialized.
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