[1]: run-user-0.mount: Deactivated successfully.Jul 03 09:37:47 IDC systemd[1]: user-runtime-dir@0.service: Deactivated successfully.Jul 03 09:37:47 IDC systemd[1]: Stopped user-runtime-dir@0.service - User Runtime Directory /run/user/0.Jul 03 09:37:47 IDC systemd[1]: Removed...
[1]: run-user-0.mount: Deactivated successfully.Jul 03 09:37:47 IDC systemd[1]: user-runtime-dir@0.service: Deactivated successfully.Jul 03 09:37:47 IDC systemd[1]: Stopped user-runtime-dir@0.service - User Runtime Directory /run/user/0.Jul 03 09:37:47 IDC systemd[1]: Removed...
日期格式化:yyyy-mm-dd的格式: const now = new Date();const year = now.getFullYear();const mounth = (now.getMonth() + 1).toString().padStart(2, '0')const day = (now.getDate()).toString().padStart(2, '0')console.log(`${year}-${mounth}-${day}`); // 今天的日期 : 2021-...
class PauseMenu extends React.Component { componentWillMount() { AppStateIOS.addEventListener('change',this.onAppPaused.bind(this)); } componentWillUnmount() { AppStateIOS.removeEventListener('change',this.onAppPaused.bind(this)); } onAppPaused(event) { } } 正确的做法 class PauseMenu extends ...
classPauseMenuextendsReact.Component{componentWillMount(){AppStateIOS.addEventListener('change',this.onAppPaused.bind(this)); }componentWillUnmount(){AppStateIOS.removeEventListener('change',this.onAppPaused.bind(this)); }onAppPaused(event){
Component{ componentWillMount(){ AppStateIOS.addEventListener('change', this.onAppPaused.bind(this)); } componentWillUnmount(){ AppStateIOS.removeEventListener('change', this.onAppPaused.bind(this)); } onAppPaused(event){ } } 正确的做法 class PauseMenu extends React.Component{ constructor(...
componentWillMount() { AppStateIOS.addEventListener('change',this.onAppPaused) } componentWillUnmount() { AppStateIOS.removeEventListener('change',this.onAppPaused) } onAppPaused =(event) =>{} } 需要注意的是:不论是 bind 还是箭头函数,每次被执行都返回的是一个新的函数引用,因此如果你还需要函数...
[1]: run-user-0.mount: Deactivated successfully.Jul 03 09:37:47 IDC systemd[1]: user-runtime-dir@0.service: Deactivated successfully.Jul 03 09:37:47 IDC systemd[1]: Stopped user-runtime-dir@0.service - User Runtime Directory /run/user/0.Jul 03 09:37:47 IDC systemd[1]: Removed...
心得:不论是箭头函数还是bind,每次被执行都返回的是一个新的函数引用,因此如果你还需要函数的引用去做一些别的事情(譬如卸载监听器),那么你必须自己保存这个引用。 卸载监听器时的陷阱 错误的做法 class PauseMenu extends React.Component{ componentWillMount(){ ...
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