论坛 › 知识问答 › ios - 在应用程序购买 - 应用程序有时会崩溃

菜鸟教程小白 发表于 2022-12-12 09:35:44

ios - 在应用程序购买 - 应用程序有时会崩溃

                                            <p><p>我已经在互联网上浏览了几天，但找不到解决问题的方法。我创建了一个应用程序，并希望您通过应用程序内购买来删除广告。我的问题是，当我单击“购买产品”按钮时，应用程序有时会崩溃。然后我在 <code>[ addPayment:payment];</code> 行之后收到错误消息“Thread 1: EXC_BAD_ACCESS (code = 1, address = 0x16e6f6980)”。</p>

<p>这里是我的 PurchasedViewController 的 .h:</p>

<pre><code>​#import &lt;UIKit/UIKit.h&gt;
#import &lt;StoreKit/StoreKit.h&gt;
@interface PurchasedViewController2 : UIViewController &lt;SKPaymentTransactionObserver, SKProductsRequestDelegate&gt;{
NSTimer *myTimer;
int countdown;
}
@property (strong, nonatomic) SKProduct *product;
@property (strong, nonatomic) NSString *productID;
@property (strong, nonatomic) IBOutlet UILabel *productTitle;
@property (strong, nonatomic) IBOutlet UITextView *productDescription;
@property (strong, nonatomic) IBOutlet UIButton *buyButton;
@property (weak, nonatomic) IBOutlet UIButton *goBack;
@property (weak, nonatomic) IBOutlet UILabel *labelGray;
@property (weak, nonatomic) IBOutlet UILabel *labelCountdown;
- (IBAction)GoBack:(id)sender;
- (IBAction)BuyProduct:(id)sender;
- (IBAction)Restore:(id)sender;
-(void)getProductID:(UIViewController *)viewController;
-(void)UnlockPurchase;
-(void)update;
@end
</code></pre>

<p>这里是.m</p>

<pre><code>​#import &#34;PurchasedViewController2.h&#34;
#import &#34;ViewController.h&#34;
@interface PurchasedViewController2 ()
@property (strong, nonatomic) ViewController *homeViewController;
@end
@implementation PurchasedViewController2
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = ;
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
;
countdown = 5;
_labelCountdown.text = ;
_goBack.enabled = FALSE;
myTimer = ;
// Do any additional setup after loading the view.
}
-(void)update{
countdown--;
if (countdown &gt;=0) {
_labelCountdown.text = ;
}
if (countdown &lt;=0) {
_labelCountdown.hidden = TRUE;
_labelGray.hidden = TRUE;
_goBack.enabled = TRUE;
;
}
}
- (void)didReceiveMemoryWarning
{
;
// Dispose of any resources that can be recreated.
}
/*
#pragma mark - Navigation
// In a storyboard-based application, you will often want to do a little preparation before navigation
- (void)prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
// Get the new view controller using .
// Pass the selected object to the new view controller.
}
*/
- (IBAction)GoBack:(id)sender {
;
}
- (IBAction)BuyProduct:(id)sender {

SKPayment *payment = ;
[ addTransactionObserver:self];
[ addPayment:payment];
}
-(void)viewDidUnload{
[removeTransactionObserver:self];
;
}
- (IBAction)Restore:(id)sender {
[ addTransactionObserver:self];
[ restoreCompletedTransactions];
}
-(void)paymentQueueRestoreCompletedTransactionsFinished:(SKPaymentQueue *)queue{
;
}
-(void)getProductID:(ViewController *)viewController{
_homeViewController = viewController;
if () {
SKProductsRequest *request = [ initWithProductIdentifiers:];
request.delegate = self;

;
}
else{
_productDescription.text = @&#34;Please enable in app purchase in your setting&#34;;
}
}

#pragma mark _
#pragma mark SKProductsRequestDelegate
-(void) productsRequest:(SKProductsRequest *)request didReceiveResponse:(SKProductsResponse *)response{

NSArray *products = response.products;

if (products.count != 0) {
_product = products;
_buyButton.enabled = YES;
_productTitle.text = _product.localizedTitle;
_productDescription.text = _product.localizedDescription;
}
else{
_productTitle.text = @&#34;Product Not Found&#34;;
}
products = response.invalidProductIdentifiers;
for (SKProduct *product in products) {
NSLog(@&#34;Product not Found: %@&#34;, product);
}
}

-(void)paymentQueue:(SKPaymentQueue *)queue updatedTransactions:(NSArray *)transactions {
for (SKPaymentTransaction *transaction in transactions) {
switch (transaction.transactionState) {
case SKPaymentTransactionStatePurchased:;
[ finishTransaction:transaction];
break;
case SKPaymentTransactionStateFailed:NSLog(@&#34;Transaction Failed&#34;);
[ finishTransaction:transaction];
default:
break;
}
}
}

-(void)UnlockPurchase{
_buyButton.enabled = NO;
;
;
}
@end
</code></pre>

<p>这是我的观点:</p>

<pre><code>​- (IBAction)PurchaseItem:(id)sender {
_purchaseController = [ initWithNibName:nil bundle:nil];
_purchaseController.productID =@&#34;PS.PileUp.RemoveAds&#34;;
[ addTransactionObserver:_purchaseController];
;
;
}
</code></pre>

<p>非常感谢你</p></p>
                                    <br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
                                            <p><p>谢谢，我解决了。我将 GoBack 方法更改为:</p>

<pre><code>- (IBAction)GoBack:(id)sender {
[removeTransactionObserver:self];
;
</code></pre>

<p>}</p></p>
                                   
                                                <p style="font-size: 20px;">关于ios - 在应用程序购买 - 应用程序有时会崩溃，我们在Stack Overflow上找到一个类似的问题：
                                                        <a href="https://stackoverflow.com/questions/23371475/" rel="noreferrer noopener nofollow" style="color: red;">
                                                                https://stackoverflow.com/questions/23371475/
                                                        </a>
                                                </p>
                                       

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