iphone - 在 UIbutton 中分配随机标题

Question

我的应用程序就像与测验相关，在我看来，我有1个 ImageView 和4个UI按钮，最初我必须在imageview<中加载图像 并以随机方式分配4个按钮标题，其中一个按钮应该是当前图像名称，如果用户单击该按钮我想显示下一组按钮标题和新图像

 -(IBAction)answersetting:(id)sender
{
int i=0;
UIButton *mybutton = (UIButton *)sender;
[mybutton addTarget:self action:@selector(submitGuess:)
forControlEvents:UIControlEventValueChanged];
if(mybutton.tag == 1||mybutton.tag == 2||mybutton.tag == 3||mybutton.tag == 4)
{
           for(int loop = 0; loop<4;loop++)
    {
        animage.image=[UIImage  imageNamed:[NSString stringWithFormat:@"%@.jpg",[imageary objectAtIndex:i]]];
        name=[self convertToDisplayName:[imageary objectAtIndex:i]];
        [mybutton setTitle:name forState:UIControlStateNormal];
        NSLog(@"current image name :%@",name);
        if ([mybutton.titleLabel.text isEqualToString:[imageary objectAtIndex:i]])
        {
            //titles equal
            [self alertshow];
            i++;
        }

        UIView *newView = [self.view viewWithTag:i];
        if([newView isKindOfClass:[UIButton class]])
        {
            UIButton *newButton = (UIButton *)newView;
            [newButton setTitle:name forState:UIControlStateNormal];
        }
    }
   }
 }

这无法执行我上面描述的内容。我应该在代码中进行哪些更改？请帮助解决这个问题

Answer 1

只需创建一个用于显示图像和设置按钮标题的方法。并使用另一种方法来评估猜测结果。

//This method display the image and buttons

-(void)displayImageAndButton:(int)pos
{
       animage.image=[UIImage  imageNamed:[NSString stringWithFormat:@"%@.jpg",[imageary objectAtIndex:pos]]];

        UIView *newView = [self.view viewWithTag:buttonTag1];
        if([newView isKindOfClass:[UIButton class]])
        {
            UIButton *newButton = (UIButton *)newView;
            name=[self convertToDisplayName:[imageary objectAtIndex:pos++]];
            [newButton addTarget:self action:@selector(submitGuess:)
forControlEvents:UIControlEventValueChanged];
            [newButton setTitle:name forState:UIControlStateNormal];
        }
        newView = [self.view viewWithTag:buttonTag2];
        if([newView isKindOfClass:[UIButton class]])
        {
            UIButton *newButton = (UIButton *)newView;
            name=[self convertToDisplayName:[imageary objectAtIndex:pos++]];
            [newButton addTarget:self action:@selector(submitGuess:)
forControlEvents:UIControlEventValueChanged];
            [newButton setTitle:name forState:UIControlStateNormal];
        }
        newView = [self.view viewWithTag:buttonTag3];
        if([newView isKindOfClass:[UIButton class]])
        {
            UIButton *newButton = (UIButton *)newView;
            name=[self convertToDisplayName:[imageary objectAtIndex:pos++]];
            [newButton addTarget:self action:@selector(submitGuess:)
forControlEvents:UIControlEventValueChanged];
            [newButton setTitle:name forState:UIControlStateNormal];
        }
        newView = [self.view viewWithTag:buttonTag4];
        if([newView isKindOfClass:[UIButton class]])
        {
            UIButton *newButton = (UIButton *)newView;
            name=[self convertToDisplayName:[imageary objectAtIndex:pos++]];
            [newButton addTarget:self action:@selector(submitGuess:)
forControlEvents:UIControlEventValueChanged];
            [newButton setTitle:name forState:UIControlStateNormal];
        }
 }

    //this method evaluates the answer

    - (IBAction)submitGuess:(id)sender
    {
      UIButton *mybutton = (UIButton *)sender;
      if ([mybutton.titleLabel.text isEqualToString:[imageary objectAtIndex:positionOfQuest]])
      {
                //titles equal
                [self alertshow];
      }
      positionOfQuest++;
      [self displayImageAndButton:positionOfQuest];
    }

这里的buttonTag1，buttonTag2，buttonTag3和buttonTag4是你的按钮的标签。

int viewDidLoad 声明一个变量，如下所示:

static positionOfQuest = 0; //this for holding the question number

在调用以下方法之前，在 IB 中添加按钮标签并在 viewDidLoad 中初始化它们

并且您需要调用 viewDidLoad 中的方法，如下所示:

[self displayImageAndButton:positionOfQuest];