Question

我有一个问题视图，将显示4个答案，只有1个是正确的。

但我不希望同一个按钮始终是正确答案。

我想知道如何随机放置4个UIButton并且每次都有价值。

enter image description here

当用户再次回答此问题时，答案将出现在不同的按钮

中

enter image description here

我放置X，y，W，H

按钮1 5,219,230,45

按钮2 5,273,230,45

按钮3 244,224,230,45

按钮4 244,273,230,45

Answer 1

我已经在我身边实现了相同的代码，并且工作正常。

-(void)randomAllocation
{
    NSMutableArray* allstring = [[NSMutableArray alloc]initWithObjects:@"Correct",@"Wrong",@"Wrong1",@"Wrong2", nil];

    NSMutableArray* outcomeOFrandom = [[NSMutableArray alloc]init];

    for (int i=0; i<[allstring count]; i++) {
        int temp = 0;

        while (temp==0) {

            int randomInt  =  arc4random()  % 4;


            BOOL result = [outcomeOFrandom containsObject:[allstring objectAtIndex:randomInt]];
            if (result==FALSE ) {

                UIButton* btn = [[UIButton alloc]init];
                [btn setTitle:[allstring objectAtIndex:randomInt] forState:UIControlStateNormal];
                [btn setBackgroundColor:[UIColor blackColor]];

                NSLog(@"tital=%@",[allstring objectAtIndex:randomInt]);

                if (i==0) {
                    [btn setFrame:CGRectMake(5,219,230,45)];
                }
                else if(i==1) 
                    [btn setFrame:CGRectMake(5,273,230,45)];
                }
                else if(i==2) {
                    [btn setFrame:CGRectMake(244,224,230,45)];
                }
                else if(i==3) {
                    [btn setFrame:CGRectMake(244,273,230,45)];
                }

                [outcomeOFrandom addObject:[allstring objectAtIndex:randomInt]];
                [self.view addSubview:btn];
                [btn release];

                temp=1;
                break;
            }

        }

    }

}

Answer 2

我碰巧正在开发类似的游戏应用，所以得到了一些肯定有用的代码。请在下面查看。请注意，我已将其设置为您为正确和不正确的按钮点击调用'correctAnswerMethod'和'wrongAnswerMethod'。

// Define the four buttons in their respective frames, create the first button as the correct one, we'll shuffle it later.
UIButton *button1 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button1 setTitle:@"Correct Answer" forState:UIControlStateNormal];
[button1 addTarget:self action:@selector(correctAnswerMethod:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button1];

UIButton *button2 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button2 setTitle:@"Wrong Answer 1" forState:UIControlStateNormal];
[button2 addTarget:self action:@selector(wrongAnswerMethod:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button2];

UIButton *button3 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button3 setTitle:@"Wrong Answer 2" forState:UIControlStateNormal];
[button3 addTarget:self action:@selector(wrongAnswerMethod:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button3];

UIButton *button4 = [UIButton buttonWithType:UIButtonTypeRoundedRect];
[button4 setTitle:@"Wrong Answer 3" forState:UIControlStateNormal];
[button4 addTarget:self action:@selector(wrongAnswerMethod:) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button4];


//Create an array with the rectangles used for the frames
NSMutableArray *indexArray = [NSMutableArray arrayWithObjects:
                              [NSValue valueWithCGRect:CGRectMake(5, 219, 230, 45)], 
                              [NSValue valueWithCGRect:CGRectMake(5, 273, 230, 45)], 
                              [NSValue valueWithCGRect:CGRectMake(244, 219, 230, 45)], 
                              [NSValue valueWithCGRect:CGRectMake(244, 273, 230, 45)], nil];

//Randomize the array
NSUInteger count = [indexArray count];
for (NSUInteger i = 0; i < count; ++i) {
    int nElements = count - i;
    int n = (arc4random() % nElements) + i;
    [indexArray exchangeObjectAtIndex:i withObjectAtIndex:n];
}

//Assign the frames
button1.frame = [((NSValue *)[indexArray objectAtIndex:0]) CGRectValue];
button2.frame = [((NSValue *)[indexArray objectAtIndex:1]) CGRectValue];
button3.frame = [((NSValue *)[indexArray objectAtIndex:2]) CGRectValue];
button4.frame = [((NSValue *)[indexArray objectAtIndex:3]) CGRectValue];

Answer 3

您可以始终在相同位置创建按钮，并随机按钮上的标签。如果使用数组来提供val1，val2，val3等标签，则可以随机化数组。

Answer 4

我建议不要改变按钮的位置，而是你可以做的是随机改变按钮的currentTitle属性，一旦用户点击按钮;你可以得到按钮的currentTitle并检查它是否是正确的答案。

Answer 5

在4个选项中，只有一个是正确的，所以为什么你担心，只需给你的UIButton标记。在touchUpInside事件或您在其上指定的任何操作。只需将正确的答案标记与用户触摸的按钮标记匹配即可。

您应该设置一些逻辑来随机设置不同按钮标记的答案。

Answer 6

您应该创建按钮并将其添加为subView。当您需要将按钮放在随机位置时，您可以使用：

[button1 setFrame:CGRectMake(5,219,230,45)];
[button2 setFrame:CGRectMake(5,273,230,45)];
[button3 setFrame:CGRectMake(244,224,230,45)];
[button4 setFrame:CGRectMake(244,273,230,45 )];

Answer 7

我认为你不需要在这里设置按钮的x和y。只需设置按钮的标签，比如标签1 - 4，生成随机数1 - 4（按钮的可能标签），将按钮保存到NSArray并执行如下循环：

NSArray *buttonsArr = [[NSArray alloc]initWithObjects:button1,button2, button3, button4, nil];
int randomInt = (arc4random() % 4) + 1;
for (int i = 0; i < [buttonsArr count]; i++) {
    if ([(UIButton*)[buttonsArr objectAtIndex:i] tag] == randomInt) {
        [[buttonsArr objectAtIndex:i] setTitle:@"correct" forState:UIControlStateNormal];
    }else{
        [[buttonsArr objectAtIndex:i] setTitle:@"wrong" forState:UIControlStateNormal];
    }
}

Answer 8

使用这4个按钮创建自己的类。在这个课程中，您可以存储按钮的位置。然后你可以添加一个成员函数（如下所示），它将绘制它们：

-(void)drawButtonsWithIncorrectAtIndex:(int)index

如何随机放置UIButton和值

8 个答案: