如何在多个视图控制器中制作一个iAd标语的共享实例? [英] How to make a single shared instance of iAd banner throughout many view controllers?

问题描述

我尝试在我的应用程序委托中使用单例类，但无法使其正常工作.我还检查了iAdSuite示例(尤其是containerBanner示例，因为它似乎是最亲密的)，但我无法弄清楚.如果有一种更好的方法可以在不使用单例类的情况下完成此任务，并且您可以为我指明正确的方向，我将非常感激.我的一些单例课程代码如下.谢谢！

I have tried using a singleton class in my app delegate but I haven't been able to get that to work. I've also checked out the iAdSuite examples (particularly the containerBanner example because it seemed to be the most relative) but I can't figure it out. If there's a better way to accomplish this without using a singleton class and you can point me in the right direction I'd really appreciate it. Some of my singleton class code is below. Thank you!

@interface App Delegate

@property (assign) iAdController *iadc;
+ (AppDelegate*) sharedApplication;
- (iAdController*)sharedAd;
@end

@implementation AppDelegate

@synthesize iadc;

+ (AppDelegate*) sharedApplication
{
return [[UIApplication sharedApplication] delegate];
}

-(iAdController*)sharedAd
{
    if(iadc==nil){
        iadc=[iAdController new];
    }
    return iadc;
}


@interface ViewController

iAdController*iadc=[[AppDelegate sharedApplication] sharedAd];
//here i get an error saying, "initializer element is not a compile-time constant.

一切都正确导入.如果还有其他事我应该发贴告诉我.

Everything is imported correctly. If there's anything else I should post let me know.

推荐答案

尝试将您的单例创建更改为此:

try changing your singleton creation to this:

+ (LocationManagerSingleton*)sharedInstance {

    static LocationManagerSingleton *_sharedInstance;
    if(!_sharedInstance) {
        static dispatch_once_t oncePredicate;
        dispatch_once(&oncePredicate, ^{
            _sharedInstance = [[super allocWithZone:nil] init];
        });
    }

    return _sharedInstance;
}



+ (id)allocWithZone:(NSZone *)zone {    

    return [self sharedInstance];
}


- (id)copyWithZone:(NSZone *)zone {
    return self;    
}

- (id)init
{
    self = [super init];
    if (self != nil) 
    {
        // PERFORM any custom initialization here
    }
    return self;
}

显然要更改类的名称.

只要您想在任何一个视图控制器中使用单例，就可以这样称呼它:

Whenever you want to use your singleton in any of your viewcontrollers just call it like this:

locationManager = [LocationManagerSingleton sharedInstance];

不要忘记添加

+ (LocationManagerSingleton*) sharedInstance;

标题上.

编辑

好吧，我似乎误解了您的代码(忘了我的答案，您只是想能够从任何地方访问iAdController.因此只需放置

well it seems i misunderstood your code (forget my answer, you simply want to be able to access your iAdController from everywhere. so just place

在ViewController的.m中添加

Add inside the .m of the ViewController

@interface ViewController()
{
    iAdController *iadc; 
}

在

-(void)viewDidLoad
{
    iadc=[[AppDelegate sharedApplication] sharedAd];
}

但是将应用委托.h导入到您要在其中使用的任何视图控制器上.

but import the app delegate.h on whichever viewcontroller you want to use it in.

#import "AppDelegate.h" 

在@interface的AppDelegate中也不应有空格

also there shouldnt be a space in the AppDelegate on the @interface

这篇关于如何在多个视图控制器中制作一个iAd标语的共享实例?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！