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2014/10/15 ¤U¤È 10:08:14
iphone Programming Glossary: energyBluetooth connection between 2 iOS devices http://stackoverflow.com/questions/13857143/bluetooth-connection-between-2-ios-devices on StackOverflow itself Core Bluetooth framework can be used to communicate with ANY hardware which has Bluetooth Low Energy 4.0 hardware support. We can forget about Made For iPhone iPod MFI program if you are using Core Bluetooth technology. I..
How to send Contacts from iphone to MFI device using bluetooth? http://stackoverflow.com/questions/14258277/how-to-send-contacts-from-iphone-to-mfi-device-using-bluetooth share improve this question what kind of bluetooth device If you are making your own it must be Bluetooth 4.0. Low Energy. Then you can transfer any data using Core Bluetooth. You must then define your own Service UUID your own Characteristic..
how some apps can open setting app programmatically within their app http://stackoverflow.com/questions/14587370/how-some-apps-can-open-setting-app-programmatically-within-their-app The reason that apps like MapMyFitness open preferences is because they ask for permission to use Bluetooth Low Energy. Asking for permission is managed by CBCentralManager on first usage. This is also the class that knows if Bluetooth is..
http://stackoverflow.com/questions/15062902/core-bluetooth-and-backgrounding-detection-of-a-device-and-triggering-an-action even after being days in background mode I've written an app that needs to get informed when a certain Bluetooth Low Energy device comes within range. If the BLE device gets noticed my app just stores a timestamp. As stated in the WWDC 2012 Core.. Event Backgrounding Event backgrounding is probably what most Apps will use when interacting with Bluetooth Low Energy devices. This mode does not allow for direct communications to the accessory when the App is in the background but does..
How to get Domain Name of ipAddress and ipAddress from Domain Name in objective-c http://stackoverflow.com/questions/3572697/how-to-get-domain-name-of-ipaddress-and-ipaddress-from-domain-name-in-objective
Battery drain of iPhone while using location services http://stackoverflow.com/questions/4435585/battery-drain-of-iphone-while-using-location-services is updating location constantly I'm not talking about the significant changes service . I've tried using Instruments' Energy Usage tool but I can't seem to capture any info. At the same time it is gonna take too long to sit there and time my iPhone..
How to get the status of bluetooth (ON/OFF) in iphone programatically http://stackoverflow.com/questions/4955007/how-to-get-the-status-of-bluetooth-on-off-in-iphone-programatically update imminent. break case CBCentralManagerStateUnsupported stateString @ The platform doesn't support Bluetooth Low Energy. break case CBCentralManagerStateUnauthorized stateString @ The app is not authorized to use Bluetooth Low Energy. break.. Low Energy. break case CBCentralManagerStateUnauthorized stateString @ The app is not authorized to use Bluetooth Low Energy. break case CBCentralManagerStatePoweredOff stateString @ Bluetooth is currently powered off. break case CBCentralManagerStatePoweredOn..
iPhone 4 profile power consumption (with instruments) http://stackoverflow.com/questions/7715148/iphone-4-profile-power-consumption-with-instruments there some non linearity towards the end of the battery life Edit I found a power preset in xcode product profile CPU Energy diagnostics. It doesn't seem to work perfectly as the power consumption level is always 0 20. But it does tell me how much.. on power logging. Disconnect the device and perform the desired tests. Reconnect the device. In Instruments open the Energy Diagnostics template. Choose File Import Energy Diagnostics from Device. And you have a report of Cpu and energy during.. the desired tests. Reconnect the device. In Instruments open the Energy Diagnostics template. Choose File Import Energy Diagnostics from Device. And you have a report of Cpu and energy during the time of the log. You can find this steps and..
http://stackoverflow.com/questions/11173605/detecting-a-clap-in-ios sound pressure level calculation It seems that I need to do this Divide the samples up into sections Calculate the energy of each section Take the ratio of the energies between the previous window and the current window If the ratio exceeds some..
Finding Distance from RSSI value of bluetooth low energy enable device http://stackoverflow.com/questions/13705647/finding-distance-from-rssi-value-of-bluetooth-low-energy-enable-device Distance from RSSI value of bluetooth low energy enable device I am working on Bluetooth low energy concept project. I am getting the RSSI value between 1 and 100. As I.. Distance from RSSI value of bluetooth low energy enable device I am working on Bluetooth low energy concept project. I am getting the RSSI value between 1 and 100. As I move the tag the RSSI value increase as the peripheral.. value Are there any available formulas I am getting the RSSI value of the device with the help of this bluetooth Low energy delegate method void centralManager CBCentralManager central didDiscoverPeripheral CBPeripheral peripheral advertisementData..
How to send Contacts from iphone to MFI device using bluetooth? http://stackoverflow.com/questions/14258277/how-to-send-contacts-from-iphone-to-mfi-device-using-bluetooth access to transfer data in whatever format you want. It can be the data from the phonebook if your bluetooth low energy device know how to decode that. Maybe you want to make your own format... If you don't want to do this then you must join..
iOS 6 - BluetoothManager framework - “NSObject” not found error http://stackoverflow.com/questions/14639994/ios-6-bluetoothmanager-framework-nsobject-not-found-error to a external bluetooth accessory from my iPhone 5. The accessory is neither MFI certified nor support Bluetooth Low energy communication . So my only option is to connect to it using a private Framework and I am doing that since I am not intending..
Iphone app is delayed for 10 -15 minutes when iphone is in sleep mode http://stackoverflow.com/questions/2396786/iphone-app-is-delayed-for-10-15-minutes-when-iphone-is-in-sleep-mode events. This occurs when an overlay window pops up or when the device is locked. The point of sleep mode is to save energy. To do so the device stops listening for events like the ones you're asking for. NSTimer events will still fire since they..
Using the apple FFT and accelerate Framework http://stackoverflow.com/questions/3398753/using-the-apple-fft-and-accelerate-framework used to store Bin 0 and A 0 .imagp is used to store Bin n 2 And the magnitude of each complex number is the amount of energy vibrating around that frequency. So as you can see it wouldn't be a very great pitch detector as it doesn't have nearly..
When to use PNG or JPG in iPhone development? http://stackoverflow.com/questions/3929281/when-to-use-png-or-jpg-in-iphone-development ios png jpeg share improve this question PNG's are pixel perfect non lossy and require very little extra CPU energy to display. However large PNGs may take longer to read from storage than more compressed image formats and thus be slower..
iPhone - Backgrounding to poll for events http://stackoverflow.com/questions/4656214/iphone-backgrounding-to-poll-for-events radio on is sucking my battery down very quickly. Using the approach which I posted in Update 2 is taking nearly no energy. According to the userexperience this is a better approach. Maybe other Apps work like this hiding its behavior behind GPS..
iPhone 4 profile power consumption (with instruments) http://stackoverflow.com/questions/7715148/iphone-4-profile-power-consumption-with-instruments the Energy Diagnostics template. Choose File Import Energy Diagnostics from Device. And you have a report of Cpu and energy during the time of the log. You can find this steps and many more info on this section of the IOS Dev. lib. I am still a..
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