getInt32()
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(长整型).
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Typed Array Specification | Obsolete | Superseded by ECMAScript 6.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 2017 Draft (ECMA-262) DataView.prototype.getInt32 |
Draft |
浏览器支持
Feature | Chrome | Firefox (Gecko) | Internet Explorer | Opera | Safari |
---|---|---|---|---|---|
Basic support | 9.0 | 15.0 (15.0) | 10 | 12.1 | 5.1 |
Feature | Android | Chrome for Android | Firefox Mobile (Gecko) | IE Mobile | Opera Mobile | Safari Mobile |
---|---|---|---|---|---|---|
Basic support | 4.0 | (Yes) | 15.0 (15) | ? | 12.0 | 4.2 |