iOS app启动的方式有哪些：

1. 自己启动（用户手动点击启动）
2. urlscheme启动（关于urlScheme的详解）http://www.cnblogs.com/sunfuyou/p/6183064.html
3. 本地通知启动  （自己写的本地通知启动，蓝牙模块的启动，地理围栏的启动）
4. 远程通知启动    （后台服务器的推送通知）

//APPdelegate.m中写上这个方法

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions  

 //系统中自带的launchoption的字典里面的所有key

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsURLKey                   NS_AVAILABLE_IOS(3_0); // userInfo contains NSURL with launch URL

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsSourceApplicationKey     NS_AVAILABLE_IOS(3_0); // userInfo contains NSString with launch app bundle ID

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsRemoteNotificationKey    NS_AVAILABLE_IOS(3_0) __TVOS_PROHIBITED; // userInfo contains NSDictionary with payload

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsLocalNotificationKey     NS_AVAILABLE_IOS(4_0) __TVOS_PROHIBITED; // userInfo contains a UILocalNotification

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsAnnotationKey            NS_AVAILABLE_IOS(3_2); // userInfo contains object with annotation property list

UIKIT_EXTERN NSString *const UIApplicationProtectedDataWillBecomeUnavailable    NS_AVAILABLE_IOS(4_0);

UIKIT_EXTERN NSString *const UIApplicationProtectedDataDidBecomeAvailable       NS_AVAILABLE_IOS(4_0);

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsLocationKey              NS_AVAILABLE_IOS(4_0); // app was launched in response to a CoreLocation event.

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsNewsstandDownloadsKey    NS_AVAILABLE_IOS(5_0) __TVOS_PROHIBITED; // userInfo contains an NSArray of NKAssetDownload identifiers

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsBluetoothCentralsKey     NS_AVAILABLE_IOS(7_0); // userInfo contains an NSArray of CBCentralManager restore identifiers

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsBluetoothPeripheralsKey  NS_AVAILABLE_IOS(7_0); // userInfo contains an NSArray of CBPeripheralManager restore identifiers

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsShortcutItemKey          NS_AVAILABLE_IOS(9_0) __TVOS_PROHIBITED; // userInfo contains the UIApplicationShortcutItem used to launch the app.

 // Key in options dict passed to application[will | did]FinishLaunchingWithOptions and info for UIApplicationDidFinishLaunchingNotification  

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsUserActivityDictionaryKey    NS_AVAILABLE_IOS(8_0); // Sub-Dictionary present in launch options when user activity is present

UIKIT_EXTERN NSString *const UIApplicationLaunchOptionsUserActivityTypeKey          NS_AVAILABLE_IOS(8_0); // Key in user activity dictionary for the activity type

判断启动代码如下:

 

- (BOOL)application:(UIApplication *)application didFinishLaunchingWithOptions:(NSDictionary *)launchOptions {  

　　// Override point for customization after application launch.  

　　//用户自己点击启动  

　　if(!launchOptions)  

    　　{  

       　　 NSLog(@"用户点击app启动");  

    }  else      {  

　　　　NSURL *url = [launchOptions objectForKey:UIApplicationLaunchOptionsURLKey];  

　　　　//app 通过urlscheme启动  

　　　　if (url) {  

            　　NSLog(@"app 通过urlscheme启动 url = %@",url);  

        　　}  

　　　　UILocalNotification *localNotification = [launchOptions objectForKey:UIApplicationLaunchOptionsLocalNotificationKey];  

　　　　//通过本地通知启动  

　　　　if(localNotification)  

     　　　　 {  

          　　  NSLog(@"app 通过本地通知启动 localNotification = %@",localNotification);  

        　　}  

　　　　NSDictionary *remoteCotificationDic = [launchOptions objectForKey:UIApplicationLaunchOptionsRemoteNotificationKey];  

　　　　//远程通知启动  

　　　　if(remoteCotificationDic)  

        　　　　{  

          　　  NSLog(@"app 通过远程推送通知启动 remoteCotificationDic = %@",remoteCotificationDic);  

        　　}  

   　　 }  

　　return YES;  

}  

 

//位置变动的通知  

        if(launchOptions[@"UIApplicationLaunchOptionsLocationKey"])  

        {  

　　　　　　//写你的重新定位的代码  

        }  

总结：当launchOptions为空时是用户自己点击app启动，不为空时，要根据相应的key是否存在来判断是通过哪种方式启动的。