Swift: 如何从数组中的结构访问特定数据？

Question

    func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let  cell = UITableViewCell(style: .default, reuseIdentifier: nil)
    
    text_here?.text = data[indexPath.row].properties.timeseries.description
    
    return cell

}

struct Properties: Decodable {
let meta: Meta
var timeseries: [Timeseries]

}

struct Timeseries: Decodable {
let time: String
let data: Data

}

struct Data: Decodable {
    let instant: Instant
   // let next_1_hours: Next_1_hours
    //let next_6_hours: Next_6_hours
    //let next_12_hours: Next_12_hours

}

struct Instant: Decodable {
    let details: Details
}

// MARK: - Details
struct Details: Decodable {
    let air_pressure_at_sea_level: Double
    let air_temperature: Double
    let cloud_area_fraction: Double?
    let cloud_area_fraction_high: Double?
    let cloud_area_fraction_low: Double?
    let cloud_area_fraction_medium: Double?
    let dew_point_temperature: Double?
    let fog_area_fraction: Double?
    let relative_humidity: Double
    let ultraviolet_index_clear_sky: Double?
    let wind_from_direction: Double
    let wind_speed: Double
}

在此代码行“text_here?.text = data[indexPath.row].properties.timeseries.description”。我不能进一步说明； “text_here?.text = 数据[indexPath.row].properties.timeseries.data.instant.details.air_pressure_at_sea_level.description”.

所以我的问题是如何处理数组中声明的数据，以便我可以指定它背后的数据？就像上面的代码示例一样。

Answer 1

先尝试下标 timeseries 数组

func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
    let  cell = UITableViewCell(style: .default, reuseIdentifier: nil)
    
    text_here?.text = data[indexPath.row].properties.timeseries[*index*]..
    
    return cell

Answer 2

来自 Structures and Classes

struct Resolution {
    var width = 0
    var height = 0
}
let someResolution = Resolution()
print("The width of someResolution is \(someResolution.width)")
// Prints "The width of someResolution is 0"

这就是您声明结构、初始化结构和访问其属性的方式。您可以将相同类型的结构存储在 Collection Types 中，然后使用索引访问元素。

let resolutions = [Resolution]()
resolutions.append(someResolution)
let myResolutionWidth = resolutions[0].width

Swift: 如何从数组中的结构访问特定数据？

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