DataView.prototype.getFloat32()

getFloat32()方法DataView相对于起始位置偏移 n 个字节处开始,获取一个32-bit数(浮点型,4个字节).

语法

dataview.getFloat32(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 float is stored in little- or big-endian format. If false or undefined, a big-endian value is read.

返回

一个浮点型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.getFloat32(1); // 0

规范

Specification Status Comment
Typed Array Specification Obsolete Superseded by ECMAScript 6.
ECMAScript 2015 (6th Edition, ECMA-262)
DataView.prototype.getFloat32
Standard Initial definition in an ECMA standard.
ECMAScript Latest Draft (ECMA-262)
DataView.prototype.getFloat32
Draft

浏览器支持

Update compatibility data on GitHub
DesktopMobileServer
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung InternetNode.js
getFloat32Chrome Full support 9Edge Full support 12Firefox Full support 15IE Full support 10Opera Full support 12.1Safari Full support 5.1WebView Android Full support 4Chrome Android Full support YesFirefox Android Full support 15Opera Android Full support 12.1Safari iOS Full support 4.2Samsung Internet Android Full support Yesnodejs Full support Yes

Legend

Full support  
Full support

另见