Question

我正在尝试创建两个按钮，其标签最初设置为默认值。这两个按钮由popOverViewController管理，其中viewDidLoad方法初始化所有控件。我还有另一个名为addButtons的方法，它在收到Apple的服务器包含产品描述和价格的有效响应后，由AppDelegate执行。

我的问题是我无法使用该方法更新标签。

popOverViewController中的viewDidLoad方法是：

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
// Add a label to the popover's view controller.
button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button addTarget:self
           action:@selector(button1Week:)
 forControlEvents:UIControlEventTouchDown];
NSString *priceWeekly = [NSString stringWithFormat:@"weekly subscription"];
[button setTitle:priceWeekly forState:UIControlStateNormal];
button.frame = CGRectMake(0.0, 0.0, 200.0, 50.0);
[button2 addTarget:self
            action:@selector(button1Month:)
  forControlEvents:UIControlEventTouchDown];
[button2 setTitle:@"monthly subscription" forState:UIControlStateNormal];
button2.frame = CGRectMake(0.0, 55.0, 200.0, 50.0);
[self.view addSubview:button];
[self.view addSubview:button2];
}

和我的更新标签方法，我确信它会在正确的时间被调用，是：

-(void)addButtons {
[self.button setTitle:@"updated label" forState:UIControlStateNormal];
[self.button2 setTitle:@"updated label 2" forState:UIControlStateNormal];
}

您可以查看我的代码并建议更新标签的正确方法吗？基本上我想用默认标签初始化控件，因为控件创建和服务器响应之间的等待时间。

更新：

我已按如下方式更新了代码，但仍然执行了addButtons方法中的所有内容，因为我要检查NSLog，但按钮标题仍然保留为viewdidload中创建的

- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
// Add a label to the popover's view controller.
UIButton *button = [UIButton buttonWithType:UIButtonTypeRoundedRect];
UIButton *button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
ilManifestoAppDelegate *delegate = (ilManifestoAppDelegate*)[[UIApplication sharedApplication] delegate];
[button addTarget:self
           action:@selector(button1Week:)
 forControlEvents:UIControlEventTouchDown];
//    [button setTitle:priceWeekly forState:UIControlStateNormal];
button.frame = CGRectMake(0.0, 0.0, 200.0, 50.0);
[button2 addTarget:self
            action:@selector(button1Month:)
  forControlEvents:UIControlEventTouchDown];
//    [button2 setTitle:@"monthly subscription" forState:UIControlStateNormal];
button2.frame = CGRectMake(0.0, 55.0, 200.0, 50.0);
//    [self addButtons];
NSString *weekPrice = [NSString stringWithFormat:@"settimanale a %@",delegate.priceWeek];
[button setTitle:weekPrice forState:UIControlStateNormal];
[button2 setTitle:@"updated label 2" forState:UIControlStateNormal];
NSLog(@"week price %@", weekPrice);
[self.view addSubview:button];
[self.view addSubview:button2];
}

-(void)addButtons {
UIButton *button = [UIButton buttonWithType:UIButtonTypeInfoDark];
[button setTitle:@"modificato" forState:UIControlStateNormal];
[self.view addSubview:button];
NSLog(@"addButtons executed");
}

Answer 1

在viewDidLoad button您正在使用button2和addButtons。在self.button中，您使用的是self.button2和addButtons。你确定这些是相同的按钮吗？

还在{{1}}中放置一个断点，看它是否真的被调用，如果你还没有这样做的话。

您是否还为xib中的按钮创建了插座，如果您还没有将它们放在代码中。

收到SKProductsRequest的回复后，更新UIButton标题，以显示应用内购买价格

1 个答案: