捕获从何时开始的进展

Question

我的承诺用法如下 -

echo '"JANE","BOB","TIM","HARRY"' | tr -s ',' '\n' | sort | tr -s '\n' ',' | sed s/,$//g

我试图弄清楚如何利用when(fulfilled: [promise]).then {(response) -> Void in }.catch { (error) in print(error) } 的{​​{1}}属性，但到目前为止还没有运气。提前致谢。

Answer 1

PromiseKit本身有一个例子：

https://github.com/mxcl/PromiseKit/blob/master/Tests/CorePromise/03_WhenTests.swift#L120-L141

func testProgress() {
    let ex = expectation(description: "")

    XCTAssertNil(Progress.current())

    let p1 = after(.milliseconds(10))
    let p2 = after(.milliseconds(20))
    let p3 = after(.milliseconds(30))
    let p4 = after(.milliseconds(40))

    let progress = Progress(totalUnitCount: 1)
    progress.becomeCurrent(withPendingUnitCount: 1)

    when(fulfilled: p1, p2, p3, p4).done { _ in
        XCTAssertEqual(progress.completedUnitCount, 1)
        ex.fulfill()
    }

    progress.resignCurrent()

    waitForExpectations(timeout: 1, handler: nil)
}