Flutter 完美封装Text_瞬神_夜一的专栏

使用惯了android的布局，对Flutter的组件和布局简直深恶痛绝啊，于是下定决心，一点一点封装Flutter的基础组件，今天封装的是Text组件，自认为封装的非常完美，完全可以用android布局的写法来写Text了，而且可以直接设置margin,padding,color,font,等等所有的属性，只需要一行代码就能实现，废话不多说，先看效果

我们可以看到，颜色，边框，圆角通通都设置完成了，还有其他的属性，就不都一一展示了，实现这个效果需要哪些代码呢？看下面

TextView(
            "自定义textview自定义textview自定义textview自定义textview自定义textview",
            backgroundColor: Colors.red,
            textColor: Colors.white,
            padding: 10,
            cornerRadius: 10,
            borderColor: Colors.yellow,
            borderWidth: 1,
            marginTop: 5,
            singleLine: false,
          )

是的，跟android布局的方法完全一样，再也不用嵌套container再也不要写什么style了！！！

具体的封装实体类如下，为了纪念android，我叫他TextView，具体属性参考代码里面，应该都很简单易懂吧

import 'package:flutter/material.dart';

class TextView extends StatelessWidget {
  double? padding = 0;
  double? margin = 0;
  double? paddingLeft = 0;
  double? paddingRight = 0;
  double? paddingTop = 0;
  double? paddingBottom = 0;
  double? marginLeft = 0;
  double? marginRight = 0;
  double? marginTop = 0;
  double? marginBottom = 0;
  double? fontSize = 0;
  Color? textColor = Colors.black;
  Color? backgroundColor = Colors.white;
  AlignmentGeometry? alignment = Alignment.center;
  double? cornerRadius = 0;
  double? borderWidth = 0;
  Color? borderColor = Colors.white;
  String content = "";
  bool? singleLine = false;
  bool? isBold = false;

  TextView(this.content,
      {this.textColor,
      this.backgroundColor,
      this.padding,
      this.paddingTop,
      this.paddingBottom,
      this.paddingRight,
      this.paddingLeft,
      this.cornerRadius,
      this.borderColor,
      this.borderWidth,
      this.marginBottom,
      this.marginLeft,
      this.marginRight,
      this.marginTop,
      this.margin,
      this.fontSize,
      this.singleLine,
      this.isBold}) {
    if (padding != null) {
      if (padding != null && padding! > 0) {
        paddingLeft = padding;
        paddingRight = padding;
        paddingBottom = padding;
        paddingTop = padding;
      }
    }

    if (margin != null) {
      if (margin != null && margin! > 0) {
        marginLeft = margin;
        marginTop = margin;
        marginRight = margin;
        marginBottom = margin;
      }
    }
  }

  @override
  Widget build(BuildContext context) {
    return Container(
      margin: EdgeInsets.fromLTRB(this.marginLeft ?? 0, this.marginTop ?? 0,
          this.marginRight ?? 0, this.marginBottom ?? 0),
      decoration: new BoxDecoration(
        border: new Border.all(
            width: this.borderWidth ?? 0,
            color: this.borderColor ?? Colors.white),
        color: this.backgroundColor,
        borderRadius:
            new BorderRadius.all(new Radius.circular(this.cornerRadius ?? 0)),
      ),
      padding: EdgeInsets.fromLTRB(this.paddingLeft ?? 0, this.paddingTop ?? 0,
          this.paddingRight ?? 0, this.paddingBottom ?? 0),
      child: Text(
        content,
        style: TextStyle(
            color: this.textColor,
            fontSize: this.fontSize ?? 14,
            fontWeight:
                this.isBold ?? false ? FontWeight.bold : FontWeight.normal,
            overflow: this.singleLine ?? false
                ? TextOverflow.ellipsis
                : TextOverflow.clip),
      ),
    );
  }
}