Ios SwiftData错误NSFileManager
我正在从Swift 1.2更新到Swift 2,经过一些更改和更正后,我仍然有一个错误,我无法理解为什么会发生 代码如下所示:Ios SwiftData错误NSFileManager,ios,swift2,nsfilemanager,Ios,Swift2,Nsfilemanager,我正在从Swift 1.2更新到Swift 2,经过一些更改和更正后,我仍然有一个错误,我无法理解为什么会发生 代码如下所示: public static func saveUIImage(image: UIImage) -> String? { let docsPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask
public static func saveUIImage(image: UIImage) -> String? {
let docsPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0] as String
let imageDirPath = docsPath.stringByAppendingPathComponent("SwiftDataImages")
if !NSFileManager.defaultManager().fileExistsAtPath(imageDirPath) {
do {
try NSFileManager.defaultManager().createDirectoryAtPath(imageDirPath, withIntermediateDirectories: false, attributes: [:])
} catch {
print("Error creating SwiftData image folder")
return nil
}
}
let imageID = NSUUID().UUIDString
let imagePath = (imageDirPath as NSString).stringByAppendingPathComponent(imageID)
let imageAsData = UIImagePNGRepresentation(image)
if !imageAsData!.writeToFile(imagePath, atomically: true) {
print("Error saving image")
return nil
}
return imageID
}
在“do{”行上,Xcode抛出以下错误:
无法使用类型为“”的参数列表调用“createDirectoryAtPath”(字符串,WithIntermediateDirectory:Bool,attributes:u,error:u)“”
知道为什么会这样吗?我快疯了
致以亲切的问候,并提前表示感谢
)在我的Xcode 7.2中没有:
let imageDirPath = docsPath.stringByAppendingPathComponent("SwiftDataImages")
所以我尝试了这段代码,它编译得很好:
public func saveUIImage(image: UIImage) -> String? {
let docsPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0] as String
let imageDirPath = NSURL(string: docsPath)?.URLByAppendingPathComponent("SwiftDataImages")
if !NSFileManager.defaultManager().fileExistsAtPath(imageDirPath!.absoluteString) {
do {
try NSFileManager.defaultManager().createDirectoryAtPath(imageDirPath!.absoluteString, withIntermediateDirectories: false, attributes: [:])
} catch {
print("Error creating SwiftData image folder")
return nil
}
}
let imageID = NSUUID().UUIDString
let imagePath = (imageDirPath!.absoluteString as NSString).stringByAppendingPathComponent(imageID)
let imageAsData = UIImagePNGRepresentation(image)
if !imageAsData!.writeToFile(imagePath, atomically: true) {
print("Error saving image")
return nil
}
return imageID
}
苹果强烈建议使用
NSFileManager
和NSData
的URL相关API
public func saveUIImage(image: UIImage) -> String? {
let fileManager = NSFileManager.defaultManager()
let docsURL = try! fileManager.URLForDirectory(.DocumentDirectory, inDomain: .UserDomainMask, appropriateForURL: nil, create: false)
let imageDirURL = docsURL.URLByAppendingPathComponent("SwiftDataImages")
if !fileManager.fileExistsAtPath(imageDirURL.path!) {
do {
try fileManager.createDirectoryAtURL(imageDirURL, withIntermediateDirectories: false, attributes:nil)
} catch let error as NSError{
print("Error creating SwiftData image folder", error)
return nil
}
}
let imageID = NSUUID().UUIDString
let imageURL = imageDirURL.URLByAppendingPathComponent(imageID)
let imageAsData = UIImagePNGRepresentation(image)
if !imageAsData!.writeToURL(imageURL, atomically: true) {
print("Error saving image")
return nil
}
return imageID
}
即使我将属性设置为nil,错误仍然会发生奇怪..我没有收到错误消息。你的Xcode版本是什么?最新版本。这个类有很多我正在修复的编译错误。这可能是一个Xcode错误,因为我有很多代码要迁移到swift 2并奇怪地检测错误?是的!尝试清除他再次投影和重建也首先解决了其他问题。这可能会有所帮助。我会这样做。谢谢。我已经添加了一个字符串扩展名,因为该方法在swift 2上不可用,但仅在swift 1.2
中可用。absoluteString
将不起作用,因为它会将文件://
方案前缀添加到API未使用的路径中站着。嗯……没想过。谢谢你的小费。