我在我的iPhone 6上遇到了弱化效果渲染不佳的问题。
这是它的外观:
我已经检查了UIAccessibilityIsReduceTransparencyEnabled()
的值,它在设备和模拟器上都返回false。
背景图像、效果和我添加其他元素的容器视图的代码如下:
import Foundation
import UIKit
import PureLayout
class BackgroundImageView : UIView {
let bgImage = UIImageView(forAutoLayout: ())
var blurView:UIVisualEffectView!
var vibrancyView:UIVisualEffectView!
var containerView: UIView? = nil {
willSet(container) {
vibrancyView.contentView.addSubview(container!)
}
}
init(imageName: String) {
super.init()
let screenSize: CGRect = UIScreen.mainScreen().bounds
bgImage.image = UIImage(named: imageName)
// Scale relative to the size of the iPhone 6 Plus: http://martinnormark.com/smooth-transition-from-launch-image-to-view-controller-in-ios/
bgImage.transform = CGAffineTransformMakeScale(screenSize.width / 414, screenSize.height / 736)
self.addSubview(bgImage)
let blurEffect = UIBlurEffect(style: .Dark)
self.blurView = UIVisualEffectView(effect: blurEffect)
self.blurView.setTranslatesAutoresizingMaskIntoConstraints(false)
self.addSubview(blurView)
let vibrancyEffect = UIVibrancyEffect(forBlurEffect: blurEffect)
vibrancyView = UIVisualEffectView(effect: vibrancyEffect)
vibrancyView.setTranslatesAutoresizingMaskIntoConstraints(false)
blurView.contentView.addSubview(vibrancyView)
}
override init(frame: CGRect) {
super.init(frame: frame)
}
required init(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
}
override func updateConstraints() {
super.updateConstraints()
bgImage.autoCenterInSuperview()
containerView?.autoPinEdgesToSuperviewEdgesWithInsets(UIEdgeInsetsZero)
blurView.autoPinEdgesToSuperviewEdgesWithInsets(UIEdgeInsetsZero)
vibrancyView.autoPinEdgesToSuperviewEdgesWithInsets(UIEdgeInsetsZero)
}
}
UIImageRenderingModeAlwaysTemplate
模式的图像呢?无论如何,设置为此后,它们看起来更加相似了。 - gabbler