ios - 如何限制同一张照片在 iOS 的自定义相册中再次添加？

Question

UIImageWriteToSavedPhotosAlbum(newImage,  self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil)

使用此方法我可以将图片保存在相册中，但不能限制在相册中再次保存相同的照片

Answer 1

您可以检查该路径(文档目录)是否存在同名文件。

    let fileManager = FileManager.default
    var paths = (NSSearchPathForDirectoriesInDomains(.documentDirectory, .userDomainMask, true)[0] as NSString)
    paths = paths.appending("nameOfYourFile") as (NSString)
    if !fileManager.fileExists(atPath: paths as String){
          //no such file exist at this path
          UIImageWriteToSavedPhotosAlbum(newImage,  self, #selector(image(_:didFinishSavingWithError:contextInfo:)), nil) 
    }