take
仅仅从 Observable
中发出头 n 个元素

通过 take 操作符你可以只发出头 n 个元素。并且忽略掉后面的元素,直接结束序列。
演示
let disposeBag = DisposeBag()
Observable.of("🐱", "🐰", "🐶", "🐸", "🐷", "🐵")
.take(3)
.subscribe(onNext: { print($0) })
.disposed(by: disposeBag)
输出结果:
🐱
🐰
🐶
Last updated
Was this helpful?