无法使用类型为“（字符串，withIntermediateDirectories：B）的参数列表调用“createDirectoryAtPath”

Posted 2023-02-24

【中文标题】无法使用类型为“（字符串，withIntermediateDirectories：B）的参数列表调用“createDirectoryAtPath”

【英文标题】：Cannot invoke 'createDirectoryAtPath' with an argument list of type '(String, withIntermediateDirectories: B

【发布时间】：2015-10-07 07:42:13

【问题描述】：

我正在为 sqlite 数据库使用 SwiftData 框架。当我将 Xcode 表单 6.4 更新到 7.0.1 时，swift data.swift 文件显示此错误'。我提供了下面的代码。

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) 
            if !NSFileManager.defaultManager().createDirectoryAtPath(imageDirPath, withIntermediateDirectories: false, attributes: nil, error: nil) 
                print("Error creating SwiftData image folder")
                return nil
            
        
        let imageID = NSUUID().UUIDString
        let imagePath = imageDirPath.stringByAppendingPathComponent(imageID)
        let imageAsData = UIImagePNGRepresentation(image)
        if !imageAsData!.writeToFile(imagePath, atomically: true) 
            print("Error saving image")
            return nil
        
        return imageID

    

【参考方案1】：

createDirectoryAtPath 语法更改为：

- (BOOL)createDirectoryAtPath:(NSString *)path withIntermediateDirectories:(BOOL)createIntermediates attributes:(nullable NSDictionary<NSString *, id> *)attributes error:(NSError **)error NS_AVAILABLE(10_5, 2_0);

所以你可以像这样更新你的代码：

NSFileManager.defaultManager().createDirectoryAtPath(imageDirPath, withIntermediateDirectories: false, attributes: [:])

然后你用 swift 2.0 完成代码：

func saveUIImage(image: UIImage) -> String? 

    let docsPath = NSSearchPathForDirectoriesInDomains(NSSearchPathDirectory.DocumentDirectory, NSSearchPathDomainMask.UserDomainMask, true)[0] as String
    let imageDirPath = (docsPath as NSString).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

或者您可以为stringByAppendingPathComponent 使用扩展名，因为它在2.0 中不适用于String。

extension String 

    func stringByAppendingPathComponent(path: String) -> String 

        let nsSt = self as NSString

        return nsSt.stringByAppendingPathComponent(path)
    

你可以这样使用它：

let imageDirPath = docsPath.stringByAppendingPathComponent("SwiftDataImages")
let imagePath = imageDirPath.stringByAppendingPathComponent(imageID)