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Realm Xamarin
USAMI Kosuke
Fenrir Inc.
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Xamarin
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Xamarin
» C# Ͱ iOS / Android ωΠςΟϒΞϓϦ։ൃ
» iOS / Android ͰίʔυΛڞ༗Մೳ
» .NET ϥΠϒϥϦ / ωΠςΟϒϥΠϒϥϦΛ༻Մೳ
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ݸਓ։ൃϥΠηϯεແঈԽ
» Xamarin ϥΠηϯε͕ Visual Studio ϥΠηϯεͱ౷߹
» ݸਓ։ൃϥΠηϯε͕ແঈʹʢCommunity Editionʣ
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http://www.fenrir-inc.com/jp/business/app/xamarin/
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Xamarin Consulting Partner
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Realm
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Realm
» ϞόΠϧΞϓϦ͚σʔλϕʔε
» Objective-C / Swift / Java / React Native / Xamarin
» ͍͘͢ɺύϑΥʔϚϯε༏ल
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Realm 1.0
» Objective-C / Swift / Java ͕ beta ͔Β 1.0
» beta Ͱͳ͘ͳͬͨ͜ͱͰɺಋೖͷෑډ͕͘ͳͬͨ
» React Native / Xamarin beta ʢ·ͩొ͔ͨ͠Γʣ
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Introducing Realm Xamarin on 2016/05/11
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Realm Xamarin
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Install
» NuGet Ͱ؆୯ʹಋೖͰ͖Δ
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Model
public class Person : RealmObject
{
public string Name { get; set; }
public int Age { get; set; }
}
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Model ͷσʔλܕ
» ֤ϓϦϛςΟϒܕʢbool,char,byte,short,int,long,float,doubleʣ
» string
» DateTimeOffset
» Null ڐ༰ܕʢint? ͳͲʣՄೳɺnull ༻Մೳ
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getter / setter ͷࣗಈੜ
» ࣗಈ࣮ϓϩύςΟɺgetter ͱ setter ͕ࣗಈੜ͞ΕΔ
» ͦͷதͰ Realm ෦ετϨʔδͱؔ࿈͚͞ΕΔ
» Ignore ଐੑΛ͚ͭΔͱࣗಈੜ͞Εͳ͍
» ΧελϜ getter / setter ্ॻ͖͞Εͳ͍
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ΦϒδΣΫτͷऔಘʢΫΤϦʣ
public IEnumerable Persons { get; private set; }
public PersonViewModel() {
var realm = Realm.GetInstance();
Persons = realm.All()
}
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ΦϒδΣΫτͷՃ
public AddPerson() {
var realm = Realm.GetInstance();
using(var transaction = realm.BeginWrite())
{
var person = realm.CreateObject();
person.Name = "Hoge";
person.Age = 20;
transaction.Commit();
}
// ࣗಈతʹ transaction ͕ Dispose() ͞ΕΔ
}
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ΦϒδΣΫτͷࣗಈߋ৽
ʢઌ΄ͲͷίʔυΛ࠶ܝʣ
public PersonViewModel() {
var realm = Realm.GetInstance();
Persons = realm.All()
// ΦϒδΣΫτΛՃͨ͠ΒɺPersons ͕ࣗಈతʹߋ৽͞ΕΔ
// ࠶ All ΫΤϦΛ࣮ߦ͢Δඞཁͳ͍
}
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LINQ ʹΑΔΫΤϦ
// ϝιουߏจ
Persons = realm.All()
.Where(p => p.Age < 20);
// ΫΤϦࣜ
Persons = from p in realm.All()
where p.Age < 20 select p;
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Realm Xamarin ·ͱΊ
» ͱͯ؆୯ʹ͑Δ
» C# ͱͯࣗ͠વʹॻ͚Δ
» ࢀߟࢿྉ
» Realm Xamarin https://realm.io/jp/docs/xamarin/latest/
» Cross-Platform Development with Xamarin.Forms and
Realm | Xamarin Blog