如何禁用UIButton突出顯示操作

Question

我試圖用兩個按鈕實現分段控制的模擬。在默認狀態下，他們沒有圖像，只有標籤，在選定的一箇中有背景圖像。我想用TouchDown事件激活控制。

這裏是代碼（我刪除了所有不必要的東西）：

-(IBAction) onButton1 
{ 
    button1.selected = YES; 
    button2.selected = NO; 
} 

-(IBAction) onButton2 
{ 
    button1.selected = NO; 
    button2.selected = YES; 
} 

的問題是：Button1的選擇承擔。當我觸摸按鈕2時，它不會將其圖像更改爲「選定」圖像（如我所說沒有默認圖像），但是當我釋放手指時，它會改變。另外，如果我觸摸已經選擇的按鈕，它將刪除「選定」的圖像，並在我釋放時返回它。

我已經設置了突出顯示的按鈕狀態，因此它們在該狀態下具有「選定」圖像，但它沒有幫助（不僅在IB中，而且在[button setBackgroundImage:[UIImage imageNamed:@"selected.png"] forState:UIControlStateHighlighted];中）。我已經設置了adjustsImageWhenHighlighted = NO，這同樣無法以程序和IB的方式提供幫助。

我在這裏看到很多類似的（但不完全相同）的問題，但它們並不適用於我。

在此先感謝

Answer 1

因爲，你想激活在觸及事件的行動，我認爲你不需要強調。嘗試下面的代碼

- (void)viewDidLoad 
{ 
    [super viewDidLoad]; 
    // Do any additional setup after loading the view, typically from a nib. 

    button1 = [UIButton buttonWithType:UIButtonTypeCustom]; 
    button1.frame = CGRectMake(10.0f, 10.0f, 50.0f, 50.0f); 
    [button1 setBackgroundImage:[UIImage imageNamed:@"btn.jpeg"] forState:UIControlStateNormal]; 
    [button1 setBackgroundImage:[UIImage imageNamed:@"btnsel.jpeg"] forState:UIControlStateSelected]; 
    [button1 addTarget:self action:@selector(button1Action:) forControlEvents:UIControlEventTouchDown]; 
    [button1 addTarget:self action:@selector(button1TouchUp:) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside]; 

    [self.view addSubview:button1]; 
    button1.selected = YES; 

    button2 = [UIButton buttonWithType:UIButtonTypeCustom]; 
    button2.frame = CGRectMake(80.0f, 10.0f, 50.0f, 50.0f); 
    [button2 setBackgroundImage:[UIImage imageNamed:@"btn.jpeg"] forState:UIControlStateNormal]; 

    [button2 setBackgroundImage:[UIImage imageNamed:@"btnsel.jpeg"] forState:UIControlStateSelected]; 
    [button2 addTarget:self action:@selector(button2Action:) forControlEvents:UIControlEventTouchDown]; 
    [button2 addTarget:self action:@selector(button2TouchUp:) forControlEvents:UIControlEventTouchUpInside|UIControlEventTouchUpOutside]; 

    [self.view addSubview:button2]; 
} 

- (void)button1Action:(UIButton*)sender 
{ 
    button1.highlighted = NO; 
    button1.selected = YES; 
    button2.selected = NO; 
} 

- (void)button2Action:(UIButton*)sender 
{ 
    button2.highlighted = NO; 
    button2.selected = YES; 
    button1.selected = NO;  
} 

- (void)button1TouchUp:(id)sender 
{ 
    button1.highlighted = NO; 
} 

- (void)button2TouchUp:(id)sender 
{ 
    button2.highlighted = NO; 
}