我不得不说,我在几小时内寻找答案而没有任何帮助,所以我的问题在这里:
componentDidMount() {
var self = this
console.log(`INIT keys ${this.props.variants}`); // INIT KEYS [Object], [Object] ...
this.interval = setInterval(function() {
console.log(`Keys ${self.props.variants}`); // Keys ...
}.bind(self), 1000)
}
存在初始密钥,但区间内的密钥不存在。
有人能帮我吗? :)
答案 0 :(得分:0)
在this
界限中,您必须使用self
而不是this
。此外,您无需重新声明componentDidMount() {
console.log(`INIT keys ${this.props.variants}`);
this.interval = setInterval(function() {
console.log(`Keys ${this.props.variants}`);
}.bind(this), 1000)
}
:
this
如果您可以使用箭头功能,则可以忽略绑定,因为箭头功能不会重新声明componentDidMount() {
console.log(`INIT keys ${this.props.variants}`);
this.interval = setInterval(() => {
console.log(`Keys ${this.props.variants}`);
}, 1000)
}
:
let textField = searchBar.value(forKey: "searchField") as! UITextField
let glassIconView = textField.leftView as! UIImageView
glassIconView.image = glassIconView.image?.withRenderingMode(.alwaysTemplate)
glassIconView.tintColor = .white
let clearButton = textField.value(forKey: "clearButton") as! UIButton
clearButton.setImage(clearButton.imageView?.image?.withRenderingMode(.alwaysTemplate), for: .normal)
clearButton.tintColor = .white