DataView.getUint8()
JavaScript
DataView.getUint8()是dataView中的内置方法。用于在指定位置获取无符号的8位
integer(unsigned byte)。
语法
dataview.getUint8(byteoffset)
参数
byteoffset ：从读取数据的视图开始处的偏移量(以字节为单位)。
返回值
此方法返回一个无符号的8位整数。
浏览器支持
| Chrome |
9 |
| Safari |
5.1 |
| Firefox |
15 |
| Opera |
12.1 |
示例1
<script>
//JavaScript to illustrate dataview.getUint8() method
// creating a ArrayBuffer
var lidihuo = new ArrayBuffer(8);
// creating a view
var arr = new DataView(lidihuo);
// put the value 33.4 at slot 1
arr.setUint8(1,33.4);
document.write("将浮点值33.4转换为：<br><br>");
document.write(arr.getUint8(1));
//expected output: 33
</script>
输出：
将浮点值33.4转换为：
33
示例2
<script>
//JavaScript to illustrate dataview.getUint8() method
// if there is no data to be stored then it returns Nan
// creating a ArrayBuffer
var lidihuo = new ArrayBuffer(10);
// creating a view
var arr = new DataView(lidihuo);
// NO Data
arr.setUint8(1);
document.write("如果没有要存储的数据，则输出将为：<br><br>")
document.write(arr.getUint8(1));
//expected output: 0
</script>
输出：
如果没有要存储的数据，则输出将为：
0
示例3
<script>
//JavaScript to illustrate dataview.getUint8() method
// creating a ArrayBuffer
var lidihuo = new ArrayBuffer(10);
// creating a view
var arr = new DataView(lidihuo);
//We can also use math function like Math.PI
arr.setUint8(1,Math.PI);
document.write("将PI值3.14转换为 <br><br>");
document.write(arr.getUint8(1));
//expected output: 3
</script>
输出：
将PI值3.14转换为
3
示例4
<script>
//JavaScript to illustrate dataview.getUint8() method
// creating a ArrayBuffer
var lidihuo = new ArrayBuffer(10);
// creating a view
var arr = new DataView(lidihuo);
// put the value 67 at slot 1
arr.setUint8(1,67);
document.write("如果我们给出一个整数值，那么输出将是整数<br><br>");
document.write(arr.getUint8(1));
//expected output: 67
</script>
输出：
如果我们给出一个整数值，那么输出将是整数
67
