Question

这里我有一个动态json

data = {
  "name": "deltha",
  "type": "object",

  "important": [
    "name",
    "id",
    "number"
  ],

  "information": {
    "place": {
      "editable": false,
      "visible": true
    },
    "info": {
      "type": "object",
      "properties": {
        "type": {
          "visible": true

        }
      }
    },
    "Image": {
      "required": [
        "name"
      ],
      "type": "object",
      "properties": {
        "deltha": {
          "search": "yes"
        }
      }
    }

  }
}

在这里，我试图检查每个嵌套属性是否具有“ required”属性

前

data['information']["Image"]

在上面的对象中，我具有“需要”的属性，并且在该“名称”下假设像图像一样，我该如何检查每个属性以检查是否有“ required”（如果需要），那么我该如何动态读取该值

Answer 1

使用textureImageWidth = 1024 textureImageHeight = 1024 let macPixelFormatString = "ARGB" var macPixelFormat: UInt32 = 0 for c in macPixelFormatString.utf8 { macPixelFormat *= 256 macPixelFormat += UInt32(c) } let ioSurface = IOSurfaceCreate([kIOSurfaceWidth: textureImageWidth, kIOSurfaceHeight: textureImageHeight, kIOSurfaceBytesPerElement: 4, kIOSurfaceBytesPerRow: textureImageWidth * 4, kIOSurfaceAllocSize: textureImageWidth * textureImageHeight * 4, kIOSurfacePixelFormat: macPixelFormat] as CFDictionary)! IOSurfaceLock(ioSurface, IOSurfaceLockOptions.readOnly, nil) let test = CIImage(ioSurface: ioSurface) IOSurfaceUnlock(ioSurface, IOSurfaceLockOptions.readOnly, nil)检查属性是否存在

hasOwnProperty

Answer 2

我建议使用递归函数，这是一个有效的示例：stackblitz.com/edit/angular-snucnm

Answer 3

您可以按以下方式检查该属性的可用性，

if (data.information.Image.required !== undefined) {
   console.log('prop is defined')
}

如何使用复杂的json嵌套属性

3 个答案: