PriceRange.fromJson constructor
Implementation
factory PriceRange.fromJson(Map<String, dynamic> json) {
return PriceRange(
min: (json['min'] as num).toDouble(),
max: (json['max'] as num).toDouble(),
currency: json['currency'] as String? ?? 'USD', // 默认使用USD货币
symbol: json['symbol'] as String? ?? r'$', // 默认使用$符号
);
}