dataView.getFloat32

dataView.getFloat32

getFloat32()方法从DataView起始位置以byte为计数的指定偏移量(byteOffset)处获取一个32-bit数(浮点型).

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 inlittle- or big-endianformat. If false or undefined, a big-endian value is read.

返回值

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

使用该getFloat32方法

var buffer = new ArrayBuffer(8 var dataview = new DataView(buffer dataview.getFloat32(1 // 0

规范

SpecificationStatusComment
Typed Array SpecificationObsoleteSuperseded by ECMAScript 2015.
ECMAScript 2015 (6th Edition, ECMA-262)The definition of 'DataView.prototype.getFloat32' in that specification.StandardInitial definition in an ECMA standard.
ECMAScript Latest Draft (ECMA-262)The definition of 'DataView.prototype.getFloat32' in that specification.Draft

浏览器兼容性

FeatureChromeEdgeFirefox (Gecko)Internet ExplorerOperaSafari
Basic support9.0(Yes)15.0 (15.0)1012.15.1

FeatureAndroidChrome for AndroidEdgeFirefox Mobile (Gecko)IE MobileOpera MobileSafari Mobile
Basic support4.0(Yes)(Yes)15.0 (15)?12.04.2