自定義按鈕在選擇時不會更改文本顏色

Question

我使用for循環創建了3個自定義按鈕。 但是當我選擇一個按鈕時，文本顏色沒有改變，該怎么辦？ 我還要補充什么？

這是我的代碼

buttonText = [[NSArray alloc]initWithObjects: @"Slambook",@"Initiated",@"Collaborated",nil];    
NSInteger numControllers = [viewControllerArray count];

for (int i = 0; i<numControllers; i++) {

    UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
    button.frame = CGRectMake(X_BUFFER+i*(self.view.frame.size.width-2*X_BUFFER)/numControllers-X_OFFSET, Y_BUFFER, (self.view.frame.size.width-2*X_BUFFER)/numControllers, HEIGHT);
    [button setTitleColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateHighlighted];
    [button setTitleColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateSelected];
    [button setTitle:[buttonText objectAtIndex:i] forState:UIControlStateNormal];
    [button addTarget:self action:@selector(tapButtonAction:) forControlEvents:UIControlEventTouchUpInside];
    [navigationView addSubview:button];
}

Answer 1

    NSInteger numControllers = [viewControllerArray count];

    for (int i = 0; i<numControllers; i++) {

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(X_BUFFER+i*(self.view.frame.size.width-2*X_BUFFER)/numControllers-X_OFFSET, Y_BUFFER, (self.view.frame.size.width-2*X_BUFFER)/numControllers, HEIGHT);
        [button setTitleColor:[UIColor blackcolor] forState:UIControlStateNormal];
        [button setBackgroundColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1]];
        [button addTarget:self action:@selector(tapButtonAction:) forControlEvents:UIControlEventTouchUpInside];
        [navigationView addSubview:button];
    }
- (IBAction)tapButtonAction:(id)sender
{

    UIButton *btn = (UIButton*)sender;
    if ([btn isSelected]) {
        [btn setSelected:NO];
        [btn setBackgroundColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor blackcolor] forState:UIControlStateNormal];

    }
    else
    {
        [btn setSelected:YES];
        [btn setBackgroundColor:[UIColor colorWithRed:204.0/255.0 green:24.0/255.0 blue:204.0/255.0 alpha:1] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];

    }
}

使用此代碼更改您的for循環

int x = 0;
    for (int i = 0; i < [viewControllerArray count]; i++){
        //int y=2;
        UIButton *button = [[UIButton alloc] initWithFrame:CGRectMake(x+2, 0, 40, 36)];

        id myArrayElement=[viewControllerArray objectAtIndex:i];

        [button setTitle:[NSString stringWithFormat:@"%@",myArrayElement] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor blackcolor]];

        button.titleLabel.font = [UIFont systemFontOfSize:15];


        x += button.frame.size.width;

        [button setBackgroundColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(tapButtonAction:) forControlEvents:UIControlEventTouchUpInside];
    }

Answer 2

我已經嘗試過您的帶有虛擬文本的按鈕的代碼，正常狀態為黑色文本顏色，點擊時突出顯示按鈕顏色：

UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
     button.frame = CGRectMake(20, 40,50 , 35);
//        button.frame = CGRectMake(X_BUFFER+i*(self.view.frame.size.width-2*X_BUFFER)/numControllers-X_OFFSET, Y_BUFFER, (self.view.frame.size.width-2*X_BUFFER)/numControllers, HEIGHT);
    [button setTitle:@"Dummy" forState:UIControlStateNormal];
    [button setTitleColor:[UIColor blackColor] forState:UIControlStateNormal];
        [button setTitleColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateHighlighted];

        [button addTarget:self action:@selector(tapButtonAction:) forControlEvents:UIControlEventTouchUpInside];
        [self.view addSubview:button];

下面的行不會長時間更改按鈕文本的顏色，它會在點擊后幾秒鍾內更改按鈕的文本顏色

[按鈕setTitleColor：[UIColor colorWithRed：137.0 / 255.0綠色：110.0 / 255.0藍色：255.0 / 255.0 alpha：1] forState：UIControlStateHighlighted]；

嘗試這個：

 NSInteger numControllers = [viewControllerArray count];

    for (int i = 0; i<numControllers; i++) {

        UIButton *button = [UIButton buttonWithType:UIButtonTypeCustom];
        button.frame = CGRectMake(X_BUFFER+i*(self.view.frame.size.width-2*X_BUFFER)/numControllers-X_OFFSET, Y_BUFFER,(self.view.frame.size.width-2*X_BUFFER)/numControllers, HEIGHT);
   button.tag=i+200;
        [button setTitleColor:[UIColor blackcolor] forState:UIControlStateNormal];
        [button setBackgroundColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1]];
        [button addTarget:self action:@selector(tapButtonAction:) forControlEvents:UIControlEventTouchUpInside];
        [navigationView addSubview:button];
    }
- (IBAction)tapButtonAction:(id)sender
{

    UIButton *btn = (UIButton*)sender;

        [btn setBackgroundColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateNormal];
        [btn setTitleColor:[UIColor blackcolor] forState:UIControlStateNormal];

   for (int i = 0; i<numControllers; i++) {
       UIButton *restBtn=[navigationView viewWithTag:i+200];
    if(restbtn!= btn)
    {
         [restBtn setBackgroundColor:[UIColor grayColor] forState:   UIControlStateNormal];
        [restBtn setTitleColor:[UIColor blackcolor] forState:UIControlStateNormal];
}

    }
}