Question

我想为一个按钮执行三种不同的操作。我在谷歌浏览也显示了一些不同的选项，但那些没有帮助。

我在CustomUIButton中声明了NSInteger，即在IBAction中单击并初始化为0。这是代码。

-(void)changeStudentAction:(id)sender
{
    CustomUIButton *button=sender;
    NSInteger flag = 0;
    button.click=0;
    if(button.click==0)
    {
        button.click=1;
        [button setSelected:NO];
        [button setBackgroundImage:[UIImage imageNamed:@"Absent_on_coloured.png"] forState:UIControlStateNormal];
        flag=0;
    }
    else if (button.click==1)
    {
        button.click=2;
        [button setSelected:YES];
        [button setBackgroundImage:[UIImage imageNamed:@"Present_on_coloured.png"] forState:UIControlStateNormal];
        flag=1;
    }
    else if (button.click==3)
    {
        button.click=0;
        [button setBackgroundImage:[UIImage imageNamed:@"Late_on_coloured.png"] forState:UIControlStateNormal];
        [button setSelected:YES];
        flag=3;
    }

}

但它不起作用。有人能告诉我我做错了吗。

Answer 1

您正在为每个操作设置button.click = 0。所以每次点击它都会被设置为零。相反，您可以在视图控制器中保留一个单独的变量，而不是在按钮上单击属性。希望这会有所帮助： - ）

Answer 2

根据你的代码，它一直在继续

if(button.click==0)
{
button.click=1;
[button setSelected:NO];
[button setBackgroundImage:[UIImage imageNamed:@"Absent_on_coloured.png"] forState:UIControlStateNormal];
flag=0;
}

我会给你更好的建议而不是“点击”你可以使用“标签”选项，这是uibutton的一个属性。首先，您必须在.h文件中定义自定义按钮，然后在- (void)viewDidLoad中设置tag = 0 方法

Answer 3

CustomUIButton *button;
        NSInteger flag = 0;
        button.click=0;

以这种方式使用它，或者从所有这些问题中简单地使用其他变量作为因为每次这个函数每次调用它都为零，所以在函数之外使用它并使用它

  NSInteger flag = 0;
  int counter = 0;
-(void)changeStudentAction:(id)sender
    {

    if(counter ==0)
    {
        counter =1;
        [button setSelected:NO];
        [button setBackgroundImage:[UIImage imageNamed:@"Absent_on_coloured.png"] forState:UIControlStateNormal];
        flag=0;
    }
    else if (counter ==1)
    {
        counter =2;
        [button setSelected:YES];
        [button setBackgroundImage:[UIImage imageNamed:@"Present_on_coloured.png"] forState:UIControlStateNormal];
        flag=1;
    }
    else if (counter ==3)
    {
        counter =0;
        [button setBackgroundImage:[UIImage imageNamed:@"Late_on_coloured.png"] forState:UIControlStateNormal];
        [button setSelected:YES];
        flag=3;
    }

}

Answer 4

在开始按钮标记中为零，然后按以下方式更改

-(void)changeStudentAction:(id)sender{
     CustomUIButton *button=sender;
     NSInteger flag = 0;
     if(button.tag==0)
     {
         button.tag=1;
     }     
     else if (button.tag==1)
     {
        button.tag=2;
     }
     else if (button.click==3)
     {
          button.tag=0;
     }
}

Answer 5

全局定义button.click=0;，因此最初它的值将为零，之后它将增加。

@interface yourclass : superclass
{
   int click;
}


- (void)viewDidLoad{

      click=0;

}

-(void)changeStudentAction:(id)sender
{
CustomUIButton *button=sender;
NSInteger flag = 0;

if(click==0)
{
    click=1;
    [button setSelected:NO];
    [button setBackgroundImage:[UIImage imageNamed:@"Absent_on_coloured.png"] forState:UIControlStateNormal];
    flag=0;
}
else if (button.click==1)
{
    click=2;
    [button setSelected:YES];
    [button setBackgroundImage:[UIImage imageNamed:@"Present_on_coloured.png"] forState:UIControlStateNormal];
    flag=1;
}
else if (button.click==3)
{
    click=0;
    [button setBackgroundImage:[UIImage imageNamed:@"Late_on_coloured.png"] forState:UIControlStateNormal];
    [button setSelected:YES];
    flag=3;
}

}

Answer 6

请尝试以下代码可能会解决您的问题。

-(void)changeStudentAction:(id)sender
{
    CustomUIButton *button=sender;
        [UIView beginAnimations:nil context:nil];
        [UIView setAnimationDuration:0.2];
       [button setBackgroundImage:[UIImage imageNamed:@"Absent_on_coloured.png"] forState:UIControlStateNormal];

        [UIView setAnimationDuration:0.4];
        [button setBackgroundImage:[UIImage imageNamed:@"Present_on_coloured.png"] forState:UIControlStateNormal];

        [UIView setAnimationDuration:0.6];
        [button setBackgroundImage:[UIImage imageNamed:@"Late_on_coloured.png"] forState:UIControlStateNormal];

        [UIView commitAnimations];

}

对单个按钮执行三种不同的操作

6 个答案: