[英]accessing images in nsmutablearray xcode
I am converting individual images into UIImagePNGRepresentation but I keep getting a thread breakpoin ate let data = UIImagePNGRepresentation(tile as! UIImage)! 我正在将单个图像转换为UIImagePNGRepresentation,但我不断收到线程断点吃,让data = UIImagePNGRepresentationation(tile as!UIImage)! ImageNameList is an nsmutablearray of images ImageNameList是图像的nsmutablearray
var imageNameList: [String] {
var imageNameList2:[String] = [] //[NSMutableArray]()
for i in 0...149 {
let imageName = String(format: "pic_%03d", Int(i))
imageNameList2.append(imageName)
}
return imageNameList2
}
let table = PFObject(className: "Cool")
let tilesPF = imageNameList.map({ tile in
let data = UIImagePNGRepresentation(tile)! //cannot convert type string to type uiimage
let file = PFFile(data: data)
let tile = PFObject(className: "RealCool")
tile["tile"] = file
})
UIImage
is not a subclass of PFObject
, so the cast tile as! UIImage
UIImage
不是PFObject
的子类,因此将其转换tile as! UIImage
tile as! UIImage
can never be successful. tile as! UIImage
永远不会成功。 The Swift compiler should already be giving you a warning: “Cast from 'PFObject' to unrelated type 'UIImage' always fails”. Swift编译器应该已经向您发出警告:“从'PFObject'转换为无关类型'UIImage'总是失败”。
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