具有自定义颜色的UISegmentedControl:分隔符行错误

Question

它很容易改变UISegmentedControl的颜色.我发现各种解决方案像这样,本网站和最好的这一解决方案.但没有一个是我想要的.

我尝试创建一个简单的东西,它很容易,这是我的代码:(我使用的是iOS 4.2,而不是5.0和xcode 4.0.2)

id segment[3];
UISegmentedControl *segmentedControl;   
- (id)init
{
    NSArray *itens = [NSArray arrayWithObjects: @"Option 1", @"Option 2", @"Option 3", nil];    
    segmentedControl = [[UISegmentedControl alloc] initWithItems:itens];
    [segmentedControl setFrame:CGRectMake(0, 0, 500, 30)];
    [segmentedControl setSegmentedControlStyle:UISegmentedControlStyleBar];
    [segmentedControl addTarget:self 
                    action:@selector(segmentedControl:) 
          forControlEvents:UIControlEventAllEvents];

    switch (type) {
        case type1: [segmentedControl setSelectedSegmentIndex:0]; break;
        case type2: [segmentedControl setSelectedSegmentIndex:1]; break;        
        case type3: [segmentedControl setSelectedSegmentIndex:2]; break;        
    }
    for (int i=0; i<3; i++) {
        //The most important trick to work, have to retain the subviews
        segment[i] = [[[segmentedControl subviews] objectAtIndex:i] retain];
    }
    [self changeColor];
    [self addSubview:segmentedControl];
    return self;
}  

- (void)segmentedControl:(id)sender 
{
    //do some thing
    [self changeColor];
}

- (void)changeColor{ 
    for (int i=0; i<3; i++) {
        [segment[i] setTintColor:[UIColor lightGrayColor]];
    }
    int select = segmentedControl.selectedSegmentIndex;
    [segment[select] setTintColor:[UIColor blueColor]];     
}

所以它创造了这个:

非常好,然后我点击进入 Option 2

哇,这是我想要的,所以点击进入 Option 3

现在问题,这个愚蠢的蓝线(标记为红色方块)之间Option 1和Option 2.如果我Option 1再次点击,我会:

比蓝线再次出现.这意味着旧点击片段的每个左侧(但不包括第一个片段)将具有此蓝线.如果我从右到左,它就不会发生.

我不知道如何解决这个问题.如何访问此行并更改颜色？或者我将不得不使用其他代码.也许他们会遇到同样的问题......

Answer 1

我认为有更简单的解决方案.只需清理指针..

for (int i=0; i<[self.segmentedControll.subviews count]; i++) 
{
    [[self.segmentedControll.subviews objectAtIndex:i] setTintColor:nil];
    if (![[self.segmentedControll.subviews objectAtIndex:i]isSelected]) 
    {   
        UIColor *tintcolor=[UIColor blackColor];
        [[self.segmentedControll.subviews objectAtIndex:i] setTintColor:tintcolor];
    } 
    else 
    {
        UIColor *tintcolor=[UIColor blueColor];
        [[self.segmentedControll.subviews objectAtIndex:i] setTintColor:tintcolor];
    }
}

Answer 2

哇...当我们在stackoverflow中写were的时候，我们可以静下心来更好地思考。我把答案写在我的问题中：

If I go from right to left it not happens.

这就是解决方案！我必须做什么？模拟一下这个。

BOOL inside = FALSE;
- (void)changeColor{ 
    int old = segmentedControl.selectedSegmentIndex;
    for (int i=0; i<3; i++) {
      [segment[i] setTintColor:[UIColor lightGrayColor]];
    }  
/**/inside = TRUE;
/**/for (int i=3; i>0; i--) {
/**/     //When I do this, it call "segmentedControl:"
/**/    [segmentedControl setSelectedSegmentIndex:i];
/**/}

/**/int select = old;
    [segment[select] setTintColor:[UIColor blueColor]];     
    [segmentedControl setSelectedSegmentIndex:select];    
/**/inside = FALSE;    
} 

- (void)segmentedControl:(id)sender 
{
/**/if (inside==TRUE) return;   //Ignore this calls.
    //do some thing
    [self changeColor];
}