How to use uniapp global method

uniapp is a cross-platform development framework developed based on the Vue.js framework. It can run on multiple platforms such as iOS, Android, and H5 at the same time by writing a set of codes.

In uniapp, we can use global methods to conveniently call public methods. This article will introduce the definition and use of uniapp global methods.

1. Define global methods

To define global methods in uniapp, you need to use the syntax Vue.prototype.$xxxx = function(), where xxxx is the method name.

The sample code is as follows:

Vue.prototype.$formatDate = function(date) {
    const y = date.getFullYear()
    const m = date.getMonth() + 1
    const d = date.getDate()
    return y + '-' + (m > 9 ? m : '0' + m) + '-' + (d > 9 ? d : '0' + d)
}

The above code defines a $formatDate method, which is used to format the date into the form of YYYY-MM-DD.

2. Use global methods

In uniapp, we can use global methods anywhere. Just use this.$xxxx() where the method is called, where xxxx is the method name used when defining the global method.

The sample code is as follows:

export default {
    data() {
        return {
            currentDate: new Date(),
        }
    },
    methods: {
        handleClick() {
            const formatted = this.$formatDate(this.currentDate)
            uni.showToast({
                title: formatted,
            })
        },
    },
}

The handleClick in the above code is a button click event. In this event, the $formatDate method is called to format the date into the form of YYYY-MM-DD, and the uni.showToast method is used to display the formatted date in the Toast.

3. Summary

It is very convenient to define and use global methods in uniapp, which can greatly improve the reusability of code and reduce the amount of code and development time. When developing uniapp, you can flexibly use the global method of uniapp based on actual needs.

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