DataView.prototype.getInt32()

getInt32()方法从DataView相对于起始位置偏移 n 个字节处开始，获取一个32-bit数(长整型，4个字节).

语法

dataview.getInt32(byteOffset [, littleEndian])

参数

byteOffset
偏移量, 单位为字节, 从头开始计算.
littleEndian
可选 Indicates whether the 32-bit int is stored in little- or big-endian format. If false or undefined, a big-endian value is read.

返回

一个长整型32位数.

抛出错误

RangeError
如果byteOffset超出了视图能储存的值，就会抛出错误.

描述

 没有对齐约束; 多字节值可以从任何偏移量获取.

例子

var buffer = new ArrayBuffer(8);
var dataview = new DataView(buffer);
dataview.getInt32(1); // 0

规范

Specification Status Comment
Typed Array Specification Obsolete Superseded by ECMAScript 6.
ECMAScript 2015 (6th Edition, ECMA-262)
DataView.prototype.getInt32		 Standard Initial definition in an ECMA standard.
ECMAScript Latest Draft (ECMA-262)
DataView.prototype.getInt32		 Draft

浏览器支持

Update compatibility data on GitHub
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
getInt32 Chrome Full support 9 Edge Full support 12 Firefox Full support 15 IE Full support 10 Opera Full support 12.1 Safari Full support 5.1 WebView Android Full support 4 Chrome Android Full support 18 Firefox Android Full support 15 Opera Android Full support 12.1 Safari iOS Full support 4.2 Samsung Internet Android Full support Yes nodejs Full support Yes

Legend

Full support  
Full support

另见

  1. JavaScript 标准库
  2. DataView
  3. 属性
    1. DataView.prototype
    2. DataView.prototype.buffer
    3. DataView.prototype.byteLength
    4. DataView.prototype.byteOffset
  4. 方法
    1. 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. 属性
    1. Function.arguments
    2. Function.arity
    3. Function.caller
    4. Function.displayName
    5. Function.length
    6. Function.name
    7. Function.prototype
  8. 方法
    1. Function.prototype.apply()
    2. Function.prototype.bind()
    3. Function.prototype.call()
    4. Function.prototype.isGenerator()
    5. Function.prototype.toSource()
    6. Function.prototype.toString()
  9. Object
  10. 属性
    1. Object.prototype.__count__
    2. Object.prototype.__noSuchMethod__
    3. Object.prototype.__parent__
    4. Object.prototype.__proto__
    5. 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.unwatch()
    12. Object.prototype.valueOf()
    13. Object.prototype.watch()
    14. Object.setPrototypeOf()