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GPSロガー作成で得た
Tips
KyasuSoft
自己紹介

•

安原 啓悦(ヤスハラ ケイエツ)

•

Twitter @kyasusoft
バックグラウンドでの
ロケーション取得の継続
•

バックグラウンドでのロケーション取得

•

Info.plist
Required background modes :
App registers for location updates
•

ロケーション取得開始
[locationManager startUpdateLocation]

•

これだけだと、約20分動きがないと休止モードに入
る。動き出すと再開するはずなのですが、実際やって
みると再開しないっぽい!

•

そこで、プロパティを設定。

locationManager.pausesLocationUpdatesAuto
matically = NO;
位置情報って結構飛ぶんです
•

CLLocationのDelegeteで位置情報が取得でき
ますが、た∼まに100mとかポンと飛んだデー
タが得られます。

•

そのまま使うと、変な位置に居ることになった
り、距離が大幅に狂ったりします。
•

そこで、対策として

•

前回の取得位置から100m離れていたら無効
データとして捨てることにしました。

•

大体1秒毎にDelegateが呼ばれるので時速
360kmで走るといつまでも捨て続けることにな
りますが...
アプリが喋る時に
BGMの音量を下げる
•

「ミュージック」アプリで音楽をかけながらアプ
リで一定距離、時間のタイミングで喋らせた。

•

Info.plist
Required background modes :
App plays audio or streams audio/video
using AirPlay
// バックグラウンドでの再生の準備
AVAudioSession *session = [AVAudioSession sharedInstance];
[session setCategory:AVAudioSessionCategoryPlayback error:nil];
UInt32 p = 1;
// 他の音も出す
AudioSessionSetProperty
(kAudioSessionProperty_OverrideCategoryMixWithOthers, sizeof(p), &p);
p = 1;
// 他の音を下げる
AudioSessionSetProperty
(kAudioSessionProperty_OtherMixableAudioShouldDuck, sizeof(p), &p);
MKMapView
•

拡大時に建物を表示(iOS 7 only)
•

•

_map.showsBuildings = YES;

ランドマークを表示(iOS 7 only)
•

_map.showsPointsOfInterest = YES;
SWWDC GPSロガー作成で得たtips

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SWWDC GPSロガー作成で得たtips