更改UIPopoverView背景+箭头颜色

有没有办法简单地更改iOS8上的UIPopoverView背景颜色（包括其箭头）？

（我读过一些关于定制“UIPopoverControllers”的文章，这里是否也适用，意思是“否”？

这是不是我应该能够在prepareForSegue方法触发popup？ 我怎样才能达到相应的观点来改变它的外观？

Answer 1

我find了解决scheme。 iOS8不再需要子类化！ 可以从tableview – > navigation – > popoverPresentationController中像这样访问和更改背景

self.navigationController?.popoverPresentationController?.backgroundColor = UIColor.redColor() 

有关WWDC会议的更多信息214。

Answer 2

你可以简单地修改popover像这样：

  let popoverViewController = self.storyboard?.instantiateViewControllerWithIdentifier("popoverSegue") popoverViewController!.popoverPresentationController?.delegate = self popoverViewController!.modalPresentationStyle = .Popover let popoverSize = CGSize(width: 150, height: 60) popoverViewController!.preferredContentSize = popoverSize let popover = popoverViewController!.popoverPresentationController popover?.delegate = self popover?.permittedArrowDirections = .Up popover?.sourceView = self.view //change background color with arrow too! popover?.backgroundColor = UIColor.whiteColor() popover?.sourceRect = CGRect(x: self.view.frame.width, y: -10, width: 0, height: 0) presentViewController(popoverViewController!, animated: true, completion: nil) 

Answer 3

更新：这个答案已经过时了。

苹果已经改进了在popup窗口中显示UIViewController的方式。 查看UIViewController上的popoverPresentationController属性。

---

1. 将UIPopoverController上的popoverBackgroundViewClass设置为您自己的UIPopoverBackgroundView的子类：
2. 子类UIPopoverBackgroundView。

3. 实施方法：

    + (CGFloat)arrowHeight; // returns the height of the image you use for the arrow + (CGFloat)arrowBase; // returns the base of the image you use for the arrow + (UIEdgeInsets)contentViewInsets; 

4. 实现layoutSubviews，使箭头在正确的地方：

    CGFloat xOffset = self.arrowImageView.frame.origin.x; CGFloat yOffset = self.arrowImageView.frame.origin.y; if (self.arrowDirection == UIPopoverArrowDirectionUp){ xOffset = (self.bounds.origin.x + self.bounds.size.width / 2.0f) + self.arrowOffset; xOffset -= [[self class] arrowBase]/2; } else if (self.arrowDirection == UIPopoverArrowDirectionDown){ xOffset = (self.bounds.origin.x + self.bounds.size.width / 2.0f) + self.arrowOffset; yOffset = self.bounds.origin.y + self.bounds.size.height - [[self class] arrowHeight; xOffset -= [[self class] arrowBase]/2; } else if (self.arrowDirection == UIPopoverArrowDirectionRight) { yOffset = floor(self.bounds.origin.y + ((self.bounds.size.height - [[self class] arrowBase]) / 2.0f) + self.arrowOffset); xOffset = (self.bounds.origin.x + self.bounds.size.width) - [[self class] arrowHeigtht]; } else if (self.arrowDirection == UIPopoverArrowDirectionLeft){ yOffset = floor(self.bounds.origin.y + ((self.bounds.size.height - [[self class] arrowBase]) / 2.0f) + self.arrowOffset); } CGRect frameForArrowImageView = CGRectMake(xOffset, yOffset, self.arrowImageView.frame.size.width, self.arrowImageView.frame.size.height); self.arrowImageView.frame = frameForArrowImageView; // this custom method applies a rotation on the imageView to rotate for the various arrow directions [self updateTransform]; // this custom method adjusts the borderViews frame to compensate for the changes due to the arrow rotation [self updateBorderViewFrame];