本文整理匯總了TypeScript中tns-core-modules/data/observable.Observable類的典型用法代碼示例。如果您正苦於以下問題：TypeScript Observable類的具體用法？TypeScript Observable怎麽用？TypeScript Observable使用的例子？那麽, 這裏精選的類代碼示例或許可以為您提供幫助。
在下文中一共展示了Observable類的10個代碼示例，這些例子默認根據受歡迎程度排序。您可以為喜歡或者感覺有用的代碼點讚，您的評價將有助於係統推薦出更棒的TypeScript代碼示例。
示例1: beforeEach
beforeEach("create handlers", () => {
handler = function() {
callCount++;
}
observable = new Observable();
observable.once("test", handler);
});示例2: pageLoaded
export function pageLoaded(args) {
var page = args.object;
var textFieldSecured = page.getViewById("textFieldSecured");
textFieldSecured.secure = true;
var obj = new observable.Observable();
obj.set("textProperty", "text");
page.bindingContext = obj;
}示例3: it
it("fire once when fired recursively", () => {
const observable = new Observable();
let callCount1 = 0;
let callCount2 = 0;
const handler2 = function () {
callCount2++;
}
const handler1 = function () {
callCount1++;
observable.once("test", handler2);
observable.notify({ eventName: "test", object: observable });
}
observable.once("test", handler1);
observable.notify({ eventName: "test", object: observable });
assert.equal(callCount1, 1, "Expected the first handler to unsubscribe before being fired and to notify just once");
assert.equal(callCount2, 1, "Expected the second handler to be fired once when recursively notified by the first handler");
});示例4: describe
describe("once", () => {
let observable: Observable;
let handler: () => void;
let callCount: number = 0;
beforeEach("create handlers", () => {
handler = function() {
callCount++;
}
observable = new Observable();
observable.once("test", handler);
});
afterEach("reset handlers", () => {
callCount = 0;
handler = null;
observable = null;
});
function notify() {
observable.notify({ eventName: "test", object: observable });
}
function notifyWrong() {
observable.notify({ eventName: "test2", object: observable });
}
it("fires just once", () => {
notify();
notify();
assert.equal(callCount, 1, "Expected the handler to be called exactly once");
});
it("does not fire for other events", () => {
notifyWrong();
assert.equal(callCount, 0, "Expected the handler to not be called, when other events fire");
});
});示例5: activityBackPressedCallback
function activityBackPressedCallback(args: AndroidActivityBackPressedEventData) {
if (context && context.get("shouldCancel")) {
context.set("shouldCancel", false);
context.set("message", "Back-pressed canceled!");
args.cancel = true;
}
}示例6: onPageLoaded
export function onPageLoaded(args) {
var page = args.object;
vm.set("firstTitle", "fiiiirst");
vm.set("secondTitle", "secondTitle");
vm.set("secondIcon", "res://icon");
page.bindingContext = vm;
}示例7: onTap
export function onTap() {
i++;
vm.set("firstTitle", "changed " + i);
if (i === 3) {
vm.set("firstIcon", "res://ic_action");
}
if (i === 4) {
vm.set("firstIcon", "");
}
}示例8: pageLoaded
export function pageLoaded(args) {
// Get the event sender
page = args.object;
page.bindingContext = data;
data.set('src', '~/gifs/hammer.gif');
setTimeout(() => {
return data.set('src', '~/gifs/darthRide.gif');
}, 3000);
if (isAndroid && device.sdkVersion >= '21') {
const window = app.android.startActivity.getWindow();
window.setStatusBarColor(new Color('#00695C').android);
}
}示例9: function
const handler1 = function () {
callCount1++;
observable.once("test", handler2);
observable.notify({ eventName: "test", object: observable });
}示例10: notifyWrong
function notifyWrong() {
observable.notify({ eventName: "test2", object: observable });
}