禁止app左右按钮滑动

onBackPress(options) {

this.backButtonPress++;
if (this.backButtonPress > 1) {
plus.runtime.quit();
} else {
plus.nativeUI.toast('再按一次退出应用');
}
setTimeout(function() {
this.backButtonPress = 0;
}, 1000);
return true;
},