是否有可能读取 iOS 设备存储信息

Question

我需要在我的应用程序中读取我的 iOS mobile/tab 存储信息。我的意思是说设备的内存容量是多少？我们用了多少？有多少内存可用？如果可能的话，消耗最大内存的应用程序是什么？谁能告诉我 iOS 有没有可能？

Answer 1

使用以下 UIDevice 扩展名：

extension UIDevice {
    func MBFormatter(_ bytes: Int64) -> String {
        let formatter = ByteCountFormatter()
        formatter.allowedUnits = ByteCountFormatter.Units.useMB
        formatter.countStyle = ByteCountFormatter.CountStyle.decimal
        formatter.includesUnit = false
        return formatter.string(fromByteCount: bytes) as String
    }

    //MARK: Get String Value
    var totalDiskSpaceInGB:String {
       return ByteCountFormatter.string(fromByteCount: totalDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.decimal)
    }

    var freeDiskSpaceInGB:String {
        return ByteCountFormatter.string(fromByteCount: freeDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.decimal)
    }

    var usedDiskSpaceInGB:String {
        return ByteCountFormatter.string(fromByteCount: usedDiskSpaceInBytes, countStyle: ByteCountFormatter.CountStyle.decimal)
    }

    var totalDiskSpaceInMB:String {
        return MBFormatter(totalDiskSpaceInBytes)
    }

    var freeDiskSpaceInMB:String {
        return MBFormatter(freeDiskSpaceInBytes)
    }

    var usedDiskSpaceInMB:String {
        return MBFormatter(usedDiskSpaceInBytes)
    }

    //MARK: Get raw value
    var totalDiskSpaceInBytes:Int64 {
        guard let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String),
            let space = (systemAttributes[FileAttributeKey.systemSize] as? NSNumber)?.int64Value else { return 0 }
        return space
    }

    /*
     Total available capacity in bytes for "Important" resources, including space expected to be cleared by purging non-essential and cached resources. "Important" means something that the user or application clearly expects to be present on the local system, but is ultimately replaceable. This would include items that the user has explicitly requested via the UI, and resources that an application requires in order to provide functionality.
     Examples: A video that the user has explicitly requested to watch but has not yet finished watching or an audio file that the user has requested to download.
     This value should not be used in determining if there is room for an irreplaceable resource. In the case of irreplaceable resources, always attempt to save the resource regardless of available capacity and handle failure as gracefully as possible.
     */
    var freeDiskSpaceInBytes:Int64 {
        if #available(iOS 11.0, *) {
            if let space = try? URL(fileURLWithPath: NSHomeDirectory() as String).resourceValues(forKeys: [URLResourceKey.volumeAvailableCapacityForImportantUsageKey]).volumeAvailableCapacityForImportantUsage {
                return space ?? 0
            } else {
                return 0
            }
        } else {
            if let systemAttributes = try? FileManager.default.attributesOfFileSystem(forPath: NSHomeDirectory() as String),
            let freeSpace = (systemAttributes[FileAttributeKey.systemFreeSize] as? NSNumber)?.int64Value {
                return freeSpace
            } else {
                return 0
            }
        }
    }

    var usedDiskSpaceInBytes:Int64 {
       return totalDiskSpaceInBytes - freeDiskSpaceInBytes
    }

}

是否有可能读取 iOS 设备存储信息

Is there any possibility to read iOS device Storage information

iphone

objective-c

ios

swift

ios11