如何限制将同一张照片再次添加到iOS的自定义相册中？

Question

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

使用这种方法，我可以将图像保存在相册中，但不能限制再次将同一张照片保存在相册中

Answer 1

您可以检查该路径（文档目录）中是否存在相同名称的文件。

    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) 
    }