在此页

• 句法
• 描述
• 范例
• 规范
• 浏览器兼容性
• 另请参阅
• 相关话题

getUint8() method gets an unsigned 8-bit integer (unsigned byte) at the specified byte offset from the start of the DataView .

The source for this interactive example is stored in a GitHub repository. If you'd like to contribute to the interactive examples project, please clone https://github.com/mdn/interactive-examples and send us a pull request.

句法

dataview.getUint8(byteOffset)
					

参数

byteOffset

The offset, in byte, from the start of the view where to read the data.

返回值

An unsigned 8-bit integer number.

Errors thrown

RangeError

Thrown if the byteOffset is set such as it would read beyond the end of the view.

描述

There is no alignment constraint; multi-byte values may be fetched from any offset.

范例

使用 getUint8 方法

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getUint8(1); // 0
					

规范

规范
ECMAScript (ECMA-262) The definition of 'DataView.prototype.getUint8' in that specification.

浏览器兼容性

The compatibility table on this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request. 更新 GitHub 上的兼容性数据

	Desktop						Mobile						Server
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	Android webview	Chrome for Android	Firefox for Android	Opera for Android	Safari on iOS	Samsung Internet	Node.js
getUint8	Chrome 9	Edge 12	Firefox 15	IE 10	Opera 12.1	Safari 5.1	WebView Android 4	Chrome Android 18	Firefox Android 15	Opera Android 12.1	Safari iOS 4.2	Samsung Internet Android 1.0	nodejs 0.10

图例

完整支持

完整支持

另请参阅

• DataView
• ArrayBuffer

元数据

• 最后修改： Jan 14, 2020

相关话题

1. 标准内置对象
2. DataView
3. 特性
   1. DataView.prototype.buffer
   2. DataView.prototype.byteLength
   3. DataView.prototype.byteOffset
4. 方法
   1. DataView.prototype.getBigInt64()
   2. DataView.prototype.getBigUint64()
   3. DataView.prototype.getFloat32()
   4. DataView.prototype.getFloat64()
   5. DataView.prototype.getInt16()
   6. DataView.prototype.getInt32()
   7. DataView.prototype.getInt8()
   8. DataView.prototype.getUint16()
   9. DataView.prototype.getUint32()
   10. DataView.prototype.getUint8()
   11. DataView.prototype.setBigInt64()
   12. DataView.prototype.setBigUint64()
   13. DataView.prototype.setFloat32()
   14. DataView.prototype.setFloat64()
   15. DataView.prototype.setInt16()
   16. DataView.prototype.setInt32()
   17. DataView.prototype.setInt8()
   18. DataView.prototype.setUint16()
   19. DataView.prototype.setUint32()
   20. DataView.prototype.setUint8()
5. 继承：
6. Function
7. 特性
   1. Function.arguments
   2. Function.caller
   3. Function.displayName
   4. Function.length
   5. Function.name
8. 方法
   1. Function.prototype.apply()
   2. Function.prototype.bind()
   3. Function.prototype.call()
   4. Function.prototype.toSource()
   5. Function.prototype.toString()
9. Object
10. 特性
    1. Object.prototype.__proto__
    2. Object.prototype.constructor
11. 方法
    1. Object.prototype.__defineGetter__()
    2. Object.prototype.__defineSetter__()
    3. Object.prototype.__lookupGetter__()
    4. Object.prototype.__lookupSetter__()
    5. Object.prototype.hasOwnProperty()
    6. Object.prototype.isPrototypeOf()
    7. Object.prototype.propertyIsEnumerable()
    8. Object.prototype.toLocaleString()
    9. Object.prototype.toSource()
    10. Object.prototype.toString()
    11. Object.prototype.valueOf()
    12. Object.setPrototypeOf()