在 Objective-C 中显示 UIButton 标签上的数据

Question

我在代码中名为_dict的NSMutableArray中存储了5张图像。在 .h 文件中：

   @property(weak,nonatomic)IBOutlet UIButton *b1;
   @property(weak,nonatomic)IBOutlet UIButton *b2;
   @property(weak,nonatomic)IBOutlet UIButton *b3;
   @property(weak,nonatomic)IBOutlet UIButton *b4;
   @property(weak,nonatomic)IBOutlet UIButton *b5;
   @property(weak,nonatomic)IBOutlet UIButton *b6;
   @property(weak,nonatomic)IBOutlet UIButton *b7;
   @property(weak,nonatomic)IBOutlet UIButton *b8;
   @property(weak,nonatomic)IBOutlet UIButton *b9;

在.m 文件中

  dict=[[NSMutableArray alloc]init];
    dict= _array;
    NSLog(@"%@",dict);


   colorimage = [dict objectAtIndex:0];
 [_b1 setBackgroundImage:colorimage forState:UIControlStateNormal];

    colorimage1 = [dict objectAtIndex:1];
   [_b2 setBackgroundImage:colorimage1 forState:UIControlStateNormal];
    colorimage2 = [dict objectAtIndex:2];
  [_b3 setBackgroundImage:colorimage2 forState:UIControlStateNormal];
     colorimage3 = [dict objectAtIndex:3];
   [_b4 setBackgroundImage:colorimage3 forState:UIControlStateNormal];
  colorimage4 = [dict objectAtIndex:4];
  [_b5 setBackgroundImage:colorimage4 forState:UIControlStateNormal];

  int  j=0;
    img=[[NSMutableArray alloc]init];

}
-(IBAction)button1:(id)sender{
    k++;
    [img addObject:colorimage];
    [sender setBackgroundImage:[UIImage imageNamed:@"apple.png"] forState:UIControlStateNormal];
    [self check];
}
-(IBAction)button2:(id)sender{
    k++;
    [img addObject:colorimage1];
    [sender setBackgroundImage:[UIImage imageNamed:@"apple.png"] forState:UIControlStateNormal];
    [self check];
}
-(IBAction)button3:(id)sender
{
    k++;
      [img addObject:colorimage2];
    [sender setBackgroundImage:[UIImage imageNamed:@"apple.png"] forState:UIControlStateNormal];
      [self check];}
-(IBAction)button4:(id)sender
{
    k++;
    [img addObject:colorimage3];
    [sender setBackgroundImage:[UIImage imageNamed:@"apple.png"] forState:UIControlStateNormal];
      [self check];
}
-(IBAction)button5:(id)sender
{
    k++;
    [img addObject:colorimage4];
    [sender setBackgroundImage:[UIImage imageNamed:@"apple.png"] forState:UIControlStateNormal];
    [self check];
}
-(IBAction)button6:(id)sender
{
}
-(IBAction)button7:(id)sender
{
}
-(IBAction)button8:(id)sender
{
}
-(IBAction)button9:(id)sender
{
}
-(void)check{

   if(k==5)
   {
     //  NSArray *arr1 = [[NSArray alloc]initWithObjects:@"aa",@"bb",@"1",@"cc", nil];
      // NSArray *arr2 = [[NSArray alloc]initWithObjects:@"aa",@"bb",@"1",@"cc", nil];
       if([dict isEqualToArray:img])
       {
           NSLog(@"equal");
           UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title"
                                                                         message:@"Message"
                                                                  preferredStyle:UIAlertControllerStyleAlert];
           UIAlertAction* Retry = [UIAlertAction actionWithTitle:@"you got"
                                                           style:UIAlertActionStyleDefault
                                                         handler:^(UIAlertAction * action)
                                   {
                                       NSLog(@"you pressed Yes, please button");
                                       // call method whatever u need
                                   }];
           [alert addAction:Retry];
           [self presentViewController:alert animated:YES completion:nil];
       }
       else{
           NSLog(@"not equal........");
           UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title"
                                                                         message:@"Message"
                                                                  preferredStyle:UIAlertControllerStyleAlert];
           UIAlertAction* Retry = [UIAlertAction actionWithTitle:@"please try again............"
                                                           style:UIAlertActionStyleDefault
                                                         handler:^(UIAlertAction * action)
                                   {
                                       NSLog(@"you pressed Yes, please button");
                                       // call method whatever u need
                                   }];
           [alert addAction:Retry];
           [self presentViewController:alert animated:YES completion:nil];

       }
   }
  // else
 //  {
      // UIAlertController * alert=[UIAlertController alertControllerWithTitle:@"Title"
                                                               //      message:@"Message"
                                                             // preferredStyle:UIAlertControllerStyleAlert];
     //  UIAlertAction* Retry = [UIAlertAction actionWithTitle:@"please try again"
                                //                       style:UIAlertActionStyleDefault
                                //                     handler:^(UIAlertAction * action)
                             //  {
                                   //    NSLog(@"you pressed Yes, please button");
                                   // call method whatever u need
                            //   }];
     //  [alert addAction:Retry];
      // [self presentViewController:alert animated:YES completion:nil];

 //  }
}

我得到了图像。但是正如我所说，我已经在dict中存储了5张图像，我需要显示UIbutton的图像随机标记。但没有得到。

而且我还在NSMutableArray中存储了10张图像。我需要从数组中随机选择 4 张图像，并需要显示未填充的 uibutton img 中的图像（即......已经有 5 张图像将显示在 UIButton 的不同标签上，剩余的 4 张 UIButton 应该显示存储在 10 张图像数组中的图像）。怎么办？

Answer 1

使用IBOutletCollection的好方法是使用IBOutletCollection。与其创建这么多的出口，你可以使用IBOutletCollection并使你的代码变小。当你这样做的时候，你可以把所有的9个按钮收集在一个数组中。

@IBOutlet var buttons: [UIButton]!

现在让我们假设您生成了随机标签 - 使用一些随机生成器 - 并存储在其中：

var randomTags: [Int]

现在您可以使用这个漂亮的 Swift 语法来过滤和获取新的按钮数组，该数组仅包含那些标签随机生成并存储在 randomTags 中的按钮

  let newButtons =   buttons.filter { (button) -> Bool in
            return randomTags.contains(button.tag)            
        }

希望对您有所帮助。