Question

我正在围绕实现这一目标的最佳方式展开，所以也许你可以帮助我：

当UIButton响应选择器highlightImage时，如何设置所需的challengeId =我appDelegate.availableArray的索引？

在我的cellForRowAtIndexPath方法中，我正在使用按钮创建UIScrollView：

scrollView = [[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, tv.frame.size.width, 78)];
    [scrollView setContentSize:CGSizeMake(500, 78)];

    [self createScrollButtons];

    [[cell contentView] addSubview:scrollView];

我的createScrollButtons循环并在scrollView中创建按钮，循环显示availableArray

中的元素数量

- (void) createScrollButtons
{
    SuperHeroGameAppDelegate *appDelegate = (SuperHeroGameAppDelegate *)[[UIApplication sharedApplication] delegate];

    int x = 0;
    int y = 0;
    NSLog(@"Challenge array = %@",appDelegate.availableArray);
    for (int i = 0; i < [appDelegate.availableArray count]; i++) {
        NSLog(@" ID= %d", [[[appDelegate.availableArray objectAtIndex:i]valueForKey:@"id"] intValue]);
        [self createButtonAtX:x AndY:y withChallenge:[[appDelegate.availableArray objectAtIndex:i]valueForKey:@"id"]];
        x += 90;
    }

}

createButtonAtX andY withChallenge is called for each element in availableArray`，沿着scrollView正确定位它们。

- (void)createButtonAtX:(int) x AndY:(int) y withChallenge:(id)challengeId
{
    CGRect buttonRect = CGRectMake(x, y, 80, 78); 
    ChallengeButton *capeButton = [ChallengeButton buttonWithType:UIButtonTypeCustom];

    [capeButton setBackgroundColor:[UIColor clearColor]];
    [capeButton setFrame:buttonRect];

    [capeButton addTarget:self action:@selector(highlightImage:) forControlEvents:UIControlEventTouchUpInside];

    UIImage *capeImage = [UIImage imageNamed:@"CapePower.png"];
    [capeButton setBackgroundImage:capeImage forState:UIControlStateNormal];

    [scrollView addSubview: capeButton];
}

每个按钮选择器都会调用

highlightImage来确定按下哪个按钮。（理想情况下，该按钮所关联的availableArray元素）...我已经对UIButton进行了子类化并添加了int值，以便能够调用[sender setChallengeId:]

- (void) highlightImage:(id)sender
{

    if([sender isSelected] == NO){
        [sender setSelected:YES];

        [sender setChallengeId:selectedChallenge];
        NSLog(@"sender = %d",[sender challengeId]);     
        UIImage *selectedImage = [UIImage imageNamed:@"PowerBarHand.png"];
        [sender setBackgroundImage:selectedImage forState:UIControlStateSelected];

    }
    else {
        [sender setBackgroundImage:[UIImage imageNamed:@"HandstandPower.png"] forState:UIControlStateNormal];   
        [sender setSelected:NO];
        selectedChallenge = 0;
    }
}

我的问题是我无法弄清楚如何将appDelegate的availableArray元素放入我的highlightImage中，因为UIButton的[capeButton addTarget:challengeId action:@selector(highlightImage:) forControlEvents:UIControlEventTouchUpInside]将不允许我从流程中的循环中传递challengeId。

我能够将任何整数值传递给setChallengeId，并按预期处理。我只需要从循环中获取appDelegate.availableArray id值。

任何方向都会很棒！:)

Answer 1

您将availableArray转换为highlightImage:的方式与createScrollButtons相同：

SuperHeroGameAppDelegate *appDelegate = (SuperHeroGameAppDelegate *)[[UIApplication sharedApplication] delegate];

然后访问appDelegate.availableArray。

我认为这不是你真正要问的问题。我想你想要的是在setChallengeId:创建它时在每个ChallengeButton上调用createButtonAtX:AndY:withChallenge:。然后在highlightImage:执行selectedChallenge = [sender challengeId]而不是[sender setChallengeId:selectedChallenge]。

在循环中设置UIButton的属性

1 个答案: