xcode设置及使用全局变量

AppDelegate.h

@interface AppDelegate : UIResponder <UIApplicationDelegate>
{
    BOOL isApnsRun;
}

@property (strong, nonatomic) UIWindow *window;
@propertyBOOL isApnsRun;

@end

AppDelegate.m

@implementation AppDelegate
@synthesize isApnsRun;

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions
{
    // Override point for customization after application launch.
    isApnsRun = true;
    returnYES;
}

以上是完成定义，也可以是单独的文件用来保存这些定义；

在其它文件中调用时，先要引用上面的定义文件（#import "AppDelegate.h"），然后

AppDelegate *appDelegate=[[UIApplicationsharedApplication] delegate];
    if (appDelegate.isApnsRun==true){
       //
    }