可将复合类型结构转换为字符串后使用如下方法转为ArrayBuffer，参考代码如下：
interface ObjData {
A1: string,
B1: number,
C1: ObjData2
}
interface ObjData2 {
key1: string,
key2: string
}
@Entry
@Component
export struct ObjectToArrayBuffer {
@State message: string = 'Object转ArrayBuffer';
strToArrayBuffer(str: string) {
let buf = new ArrayBuffer(str.length * 2);
let bufView = new Uint16Array(buf);
for (let i = 0, strLen = str.length; i < strLen; i++) {
bufView[i] = str.charCodeAt(i);
}
return bufView;
}
build() {
Row() {
Column() {
Text(this.message)
.fontSize(50)
.fontWeight(FontWeight.Bold)
.onClick(() => {
let objData: ObjData = {
A1:'字符串',
B1: 1,
C1:{'key1':'FF','key2':'GG'}
}
let buf1 = this.strToArrayBuffer(JSON.stringify(objData));
console.info(`buf1: ${JSON.stringify(buf1 )}`);
})
}
.width('100%')
}
.height('100%')
}
}