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我使用 for 循环创建了 3 个自定义按钮。但是当我选择一个按钮时，文本颜色没有改变。我该怎么做？我还有什么要补充的？

这是我的代码

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];
}
4

2 回答 2

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我已经尝试了带有虚拟文本的单个按钮的代码，正常状态的黑色文本颜色和按钮颜色在点击时突出显示：

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];

下面的行不会长时间更改按钮文本颜色，它会在点击后几秒钟内更改按钮的文本颜色

[按钮 setTitleColor:[UIColor colorWithRed:137.0/255.0 green:110.0/255.0 blue:255.0/255.0 alpha:1] forState:UIControlStateHighlighted];

尝试这个：

 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];
}

    }
}
于 2017-11-30T10:18:14.540 回答
0 
    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];

    }
}

用这段代码改变你的 for 循环

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];
    }
于 2017-11-30T10:12:18.420 回答