下面是我用来构建图像数组的代码
var _displayImage : Array<UIImage>!
required init(coder aDecoder: NSCoder) {
self._displayImage = []
}
func buildImageSet() {
self._displayImage = [UIImage(named: "image1"), UIImage(named: "image2"), UIImage(named: "image3"), UIImage(named: "image4"), UIImage(named: "image5")]
}
我收到错误:找不到接受提供的参数的'init'的重载
我做错了什么?
答案 0 :(得分:5)
问题是你声明了你的数组:
var _displayImage : Array<UIImage>!
所以期待UIImage
个对象。问题是UIImage(named:String)
会返回UIImage?
个可选项。快速解决方法是切换它:
func buildImageSet() {
self._displayImage = [UIImage(named: "image1"), UIImage(named: "image2"), UIImage(named: "image3"), UIImage(named: "image4"), UIImage(named: "image5")]
}
对此:
func buildImageSet() {
self._displayImage = [UIImage(named: "image1")!, UIImage(named: "image2")!, UIImage(named: "image3")!, UIImage(named: "image4")!, UIImage(named: "image5")!]
}
虽然这没有考虑到任何这些图像可能是nil
的可能性。如果任何图像无法正确加载,您的应用程序将崩溃。如果你确定它们都存在并且将永远存在,这应该没问题。 :)