Created
March 22, 2016 05:47
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// 非参照型を使って副作用の少ないコードに、かつタイプセーフにしたい = swifty!!! | |
hogehoge() { [weak self] data, response, error in | |
// guardすることでnilでないことを今後保証する | |
guard let data = data else { return } | |
guard let newArray = data["populations"] as? [Population] else { return } | |
// 中身がPopulation型であることを保証するarray(タイプセーフ) | |
var populationArray: [Population] = [] | |
for item in newArray { | |
let dictionary: [String: AnyObject] | |
// とりあえずjsonの扱いはswiftyJSONな書き方してるけどお好みで。 | |
// Populationはstructで書いてるのでinitで全部つっこむ。 | |
// property代入したいときはstructの中身をvarで宣言する。 | |
let population = Population( | |
year: dictionary["year"].intValue, | |
under14: dictionary["under14"].intValue, | |
between15to64: dictionary["between15to64"].intValue, | |
over65: dictionary["over65"].intValue, | |
sum: dictionary["sum"].intValue | |
) | |
populationArray.append(population) | |
} | |
guard let `self` = self else { reuturn } | |
// ぐぎぎぎぎぎぎぎぎぎ...... | |
self._flex.itemsSource = populationArray | |
} |
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