在IOS中單擊時更改按鈕文本和背景顏色

Question

我知道這個問題經常被問到，我已經應用了許多代碼，但仍然沒有得到解決方案。

我有三個單選按鈕，當我選擇radiobutton1它顯示了show按鈕，現在我想的是，當用戶點擊radiobutton1它顯示按鈕，第一個按鈕是預選，如果用戶希望從選項按鈕選擇其他按鈕背景顏色和文字顏色應該改變。

我正在嘗試一些代碼，但只有第一個按鈕的顏色被改變，它不會改變其他按鈕的顏色。我的代碼是：

-(void)btnClick:(UIButton *)sender{ 

    switch (sender.tag) { 
     case 1: 
      if ([rd1 isSelected]==YES) { 

       [rd1 setSelected:YES]; 
      } 
      else{ 
       [rd1 setSelected:YES]; 

       [rd2 setSelected:NO]; 

       [rd3 setSelected:NO]; 

       _house.hidden=NO; 

       _flat.hidden=NO; 

       _upperP.hidden=NO; 

       _lowerP.hidden=NO; 

       _farmH.hidden=NO; 

       _roomB.hidden=NO; 

       _pentH.hidden=NO; 

       _resident.hidden=YES; 

       _commercial.hidden=YES; 

       _agricult.hidden=YES; 


       _industry.hidden=YES; 

       _plot.hidden=YES; 

       _plotF.hidden=YES; 

       _office.hidden=YES; 

       _shop.hidden=YES; 

       _wareH.hidden=YES; 

       _factory.hidden=YES; 

       _building.hidden=YES; 

       _other.hidden=YES; 

       if ([_house isSelected]==YES) { 

        House=_house.titleLabel.text; 

        NSLog(@"Button is %@",House); 

        _flat.enabled=NO; 

        _upperP.enabled=NO; 

        _lowerP.enabled=NO; 

        _farmH.enabled=NO; 

        _roomB.enabled=NO; 

        _pentH.enabled=NO; 

       } 

       else if ([_flat isSelected]==YES) { 

        _house.enabled=NO; 

        _upperP.enabled=NO; 

        _lowerP.enabled=NO; 

        _farmH.enabled=NO; 

        _roomB.enabled=NO; 

        _pentH.enabled=NO; 


       } 

       [self BgColor]; 


      } 
      break; 

     case 2: 
      if ([rd2 isSelected]==YES) { 

       [rd2 setSelected:NO]; 
      } 
      else{ 
       [rd2 setSelected:YES]; 

       [rd1 setSelected:NO]; 

       [rd3 setSelected:NO]; 

       _resident.hidden=NO; 

       _commercial.hidden=NO; 

       _agricult.hidden=NO; 

       _industry.hidden=NO; 

       _plot.hidden=NO; 

       _plotF.hidden=NO; 

       _house.hidden=YES; 

       _flat.hidden=YES; 

       _upperP.hidden=YES; 

       _lowerP.hidden=YES; 

       _farmH.hidden=YES; 

       _roomB.hidden=YES; 

       _pentH.hidden=YES; 

       _shop.hidden=YES; 

       _wareH.hidden=YES; 

       _factory.hidden=YES; 

       _building.hidden=YES; 


       _other.hidden=YES; 

       _office.hidden=YES; 




      } 
      break; 

     case 3: 
      if ([rd3 isSelected]==YES) { 

       [rd3 setSelected:NO]; 
      } 
      else{ 
       [rd3 setSelected:YES]; 

       [rd2 setSelected:NO]; 

       [rd1 setSelected:NO]; 

       _office.hidden=NO; 

       _shop.hidden=NO; 

       _wareH.hidden=NO; 

       _factory.hidden=NO; 

       _building.hidden=NO; 

       _other.hidden=NO; 

       _house.hidden=YES; 

       _flat.hidden=YES; 

       _upperP.hidden=YES; 

       _lowerP.hidden=YES; 

       _farmH.hidden=YES; 

       _roomB.hidden=YES; 

       _pentH.hidden=YES; 
       _resident.hidden=YES; 

       _commercial.hidden=YES; 

       _agricult.hidden=YES; 

       _industry.hidden=YES; 

       _plot.hidden=YES; 

       _plotF.hidden=YES; 

      } 
      break; 

     default: 
      break; 
    } 

} 

-(void)BgColor{ 

    if ([_house isSelected]==YES) { 

     [_house setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 

     _house.backgroundColor=[UIColor redColor]; 

    } 
    else if (([_flat isSelected]==YES)){ 

     [_flat setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 

     _flat.backgroundColor=[UIColor redColor]; 
    } 
} 

Answer 1

一個可能的問題可能是你叫[self BgColor];只內case 1:塊。由於該方法似乎處理房屋和公寓的標題和背景顏色，因此您應該始終將其稱爲（在switch聲明之後）。

如果這不起作用，我的建議是以較小的部分來解決問題。例如，創建3個IBActions，每個按鈕一個。給每個按鈕分配出口名稱，以便您確切知道每次更改的內容。嘗試將重複的代碼移動到自己的方法中。一直測試，並以小步驟進行測試，直至完成！

爲了讓你開始，here's a sample project有一些基本類似的功能。

Answer 2

我認爲對於單選按鈕，你只需要爲所有的設置圖像。所以你只需要按鈕選擇/正常狀態。

您可以像這樣所有不同的狀態設置圖像：

[YOUR_BUTTON setImage:YOUR_IMAGE_NORMAL forState:UIControlStateSelected]; 
[YOUR_BUTTON setImage:YOUR_IMAGE_SELECTED forState:UIControlStateNormal]; 
[YOUR_BUTTON setImage:YOUR_IMAGE_HEIGHLIGHED forState:UIControlStateHighlighted]; 
[YOUR_BUTTON setImage:YOUR_IMAGE_DISABLE forState:UIControlStateDisabled]; 

關於文字的顏色，讓我給你一個小竅門吧。檢查我的下面的方法：

-(void)btnClick:(UIButton *)sender{ 
    // This is button on which user is clicked 
    UIButton *btnCurrent = (UIButton *)sender; 

    if(btnReference != nil) 
    { 
     // If this is not a nil, it means you have clicked another button previously. 
     // So make it normal before doing any thing. 
     btnReference.selected = false; 
     [btnReference setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 

     // Assign reference of current button 
     btnReference = btnCurrent; 
    } 

    // Make changes for clicked button 
    btnReference.selected = TRUE; 
    [btnReference setTitleColor:[UIColor redColor] forState:UIControlStateHighlighted]; 
    [btnReference setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal]; 

} 

把這個條件放在你的方法之上。所以你不必擔心顏色和所有。