iOSエンジニアが悩んだUpボタンについて / 2017 potatotips 45 Up Button

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1. © 2017 VASILY,Inc.
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2. © 2017 VASILY,Inc.
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3. © 2017 VASILY,Inc.
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4. © 2017 VASILY,Inc.
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5. © 2017 VASILY,Inc.
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6. © 2017 VASILY,Inc.
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7. © 2017 VASILY,Inc.
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8. © 2017 VASILY,Inc.
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9. © 2017 VASILY,Inc.
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10. © 2017 VASILY,Inc.
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11. © 2017 VASILY,Inc.
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12. © 2017 VASILY,Inc.
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13. © 2017 VASILY,Inc.
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14. © 2017 VASILY,Inc.
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15. © 2017 VASILY,Inc.
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16. © 2017 VASILY,Inc.
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17. © 2017 VASILY,Inc.
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18. © 2017 VASILY,Inc.
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19. © 2017 VASILY,Inc.
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20. © 2017 VASILY,Inc.
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21. © 2017 VASILY,Inc.
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22. © 2017 VASILY,Inc.
    class ChildActivity : AppCompatActivity(), ItemDetailEventHandler {
    private lateinit var fromActivity: FromActivity
    private const val FROM_ACTIVITY = "from_activity"
    enum class FromActivity {
    HOME,
    SEARCH_RESULT,
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    }
    override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    fromActivity = intent.getSerializableExtra(FROM_ACTIVITY) as FromActivity
    }
    override fun onOptionsItemSelected(item: MenuItem?): Boolean {
    when (item?.itemId) {
    android.R.id.home -> {
    val intent = createIntent(fromActivity)
    intent.flags = Intent.FLAG_ACTIVITY_CLEAR_TOP
    navigateUpTo(intent)
    return true
    }
    else -> return false
    }
    }
    private fun createIntent(fromActivity: FromActivity): Intent {
    return when (fromActivity) {
    FromActivity.HOME -> Intent(this, HomeActivity::class.java)
    FromActivity.SEARCH_RESULT -> Intent(this, SearchItemResultActivity::class.java)
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    }
    }
    }
    

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23. © 2017 VASILY,Inc.
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24. © 2017 VASILY,Inc.
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