Question

我将自定义图像用于UISegmentedControl的正常/选定状态。当我点击已选择的细分时，它的外观会更改为突出显示。

我尝试为突出显示的+选定状态设置图片，但忽略了它：

   [segmentedControl setBackgroundImage:appearance.selectedBackground
                                forState:UIControlStateSelected | UIControlStateHighlighted
                              barMetrics:UIBarMetricsDefault];

是否有任何方式（包括非破坏性的私有）在选定的状态再次点击时将其置于选定状态？

Answer 1

我知道现在已经晚了但是对于那些有同样问题的人：您必须为每个状态设置所有dividerImages

// Set background images
UIImage *normalBackgroundImage = [UIImage imageNamed:@"segmented-background-unselected"];
UIImage *selectedBackgroundImage = [UIImage imageNamed:@"segmented-background-selected"];
[self setBackgroundImage:normalBackgroundImage
                forState:UIControlStateNormal barMetrics:UIBarMetricsDefault];
[self setBackgroundImage:selectedBackgroundImage
                forState:UIControlStateSelected barMetrics:UIBarMetricsDefault];
[self setBackgroundImage:normalBackgroundImage
                forState:UIControlStateHighlighted barMetrics:UIBarMetricsDefault];
[self setBackgroundImage:selectedBackgroundImage
                forState:UIControlStateSelected | UIControlStateHighlighted barMetrics:UIBarMetricsDefault];

// Set divider images
UIImage *buttonImageLeftSelected = [UIImage imageNamed:@"segmented-left-selected"];
UIImage *buttonImageNoneSelected = [UIImage imageNamed:@"segmented-none-selected"];
UIImage *buttonImageRightSelected = [UIImage imageNamed:@"segmented-right-selected"];

[self   setDividerImage:buttonImageNoneSelected
    forLeftSegmentState:UIControlStateNormal
      rightSegmentState:UIControlStateNormal
             barMetrics:UIBarMetricsDefault];

[self   setDividerImage:buttonImageLeftSelected
    forLeftSegmentState:UIControlStateSelected
      rightSegmentState:UIControlStateNormal
             barMetrics:UIBarMetricsDefault];
[self   setDividerImage:buttonImageLeftSelected
    forLeftSegmentState:UIControlStateSelected | UIControlStateHighlighted
      rightSegmentState:UIControlStateNormal
             barMetrics:UIBarMetricsDefault];
[self   setDividerImage:buttonImageLeftSelected
    forLeftSegmentState:UIControlStateSelected
      rightSegmentState:UIControlStateHighlighted
             barMetrics:UIBarMetricsDefault];

[self   setDividerImage:buttonImageRightSelected
    forLeftSegmentState:UIControlStateHighlighted
      rightSegmentState:UIControlStateSelected
             barMetrics:UIBarMetricsDefault];
[self   setDividerImage:buttonImageRightSelected
    forLeftSegmentState:UIControlStateNormal
      rightSegmentState:UIControlStateSelected | UIControlStateHighlighted
             barMetrics:UIBarMetricsDefault];
[self   setDividerImage:buttonImageRightSelected
    forLeftSegmentState:UIControlStateNormal
      rightSegmentState:UIControlStateSelected
             barMetrics:UIBarMetricsDefault];

Answer 2

这很简单，对我来说很完美，但你需要子类化并覆盖touchesBegan方法：

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
    for (UIControl *control in self.subviews) {
        if ([control respondsToSelector:@selector(isSelected)] && control.isSelected) {
            // found our selected segment, now check if we actually tapped it
            UITouch *touch = [touches anyObject];

            if (CGRectContainsPoint(control.frame, [touch locationInView:self])) {
                // tapping selected segment, do nothing. this avoids highligting it
                return;
            }
        }
    }

    [super touchesBegan:touches withEvent:event];
}

UISegmentedControl：使用自定义图像时如何不突出显示已选择的段

2 个答案: