在 UIbutton 中分配随机标题

Posted 2023-03-22

【中文标题】在 UIbutton 中分配随机标题

【英文标题】：Assign random title in UIbutton

【发布时间】：2012-11-10 10:16:44

【问题描述】：

我的 application 与测验有关，在我看来，我有 1 个图像视图和 4 个 UIbuttons，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，如果用户单击按钮我想显示下一组按钮标题和新的image

 -(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。我应该对我的代码进行哪些更改？请帮助解决这个问题

【问题讨论】：

你使用了我对你上一个问题的回答是对的 :) ***.com/questions/13284405/…

@MidhunMP 我用过，但只有当我点击时才会显示标题，并且所有按钮标题都相同

无需一次又一次地提出相同的问题，这不会为您提供任何答案，哈哈 :)

我只是任何其他选项的平均值@Wolvorin

但是如果有人有任何问题，他们可以在同一个问题上给出它，你不需要再次发布它作为不同的问题:)

【参考方案1】：

只需创建一个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 buttonTag1,buttonTag2,buttonTag3 & buttonTag4 是你的按钮的标签。

int viewDidLoad 声明一个变量，如：

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

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

你需要调用viewDidLoad中的方法，比如：

[self displayImageAndButton:positionOfQuest];

【参考方案2】：

如果你喜欢简单的方法...

#include <stdlib.h>

NSMutableArray *quiz = [NSMutableArray alloc....];

for (int i=0; i<4; i++)  
   int r = arc4random() % [quiz count];

   NSLog(@"%@", [quiz objectAtIndex:r]);
  _Button_1.title = [quiz objectAtIndex:r];

  // or better, i suggest you to use KVC
  // [self valueForKey:@"_Button_%d", i] setTitle //something like this.
  //