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Get total step count for every date in HealthKit
(6 answers)
Closed 6 years ago.
I am interested in obtaining the summary numbers of steps per day from Health Kit. Is there a way to do this without having to query for individual HKQuantitySamples and then summing up the data by day myself?
Use HKStatisticsCollectionQuery (reference documentation here) to compute the total number of steps taken per day.
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I am integrating health kit in one of my watch application. I wanted to fetch step count using HealthKit in realtime in a time interval. But after reading and understanding, I came to know that realtime is not possible.
My actual goal was to get step counts using health kit in a time period.
What you should do is use CMPedometer data for displaying real time step count and HealthKit to display a more accurate history of step counts. You could run a HKStatisticsQuery or HKStatisticsCollectionQuery to get the aggregated pedometer count (it contains both the steps counted on the user's iPhone and Watch) let's say every hour or maybe just once a day depending on how precise you want to be and only use CMPedometer data between HealthKit queries.
Using this approach, you will be able to show real time step count to your user, but you will also be able to show a more precise historical summary.
For more information and sample code, see the official documentation of HKStatisticsQuery.
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What is the maximum size of SQLite or Core Data database on iOS?
(1 answer)
Closed 6 years ago.
Someone asked me that what is maximum size limit of sqlite and core data in iOS. I had already searched this question but not getting any relevant answer. Can anyone help me
The maximum size of SQLite databases is in the hundreds of terabytes. The only real limit on iOS is the amount of free disk space. SQLite.org has a page about the theoretical limits: https://www.sqlite.org/limits.html
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How to register for an event that reminds app on specified time in iOS
(4 answers)
Closed 7 years ago.
I want to set reminder between some time period that should be repeated everyday for that time period which should be set for reminder.Please help.
Have a look here at this tutorial, I think it might help you:
http://www.appcoda.com/ios-programming-local-notification-tutorial/
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Is there any way to get the tamper-proof date and time on iPhone?
(1 answer)
Closed 8 years ago.
So, I'm developing an app that is based on the time, but with NSDate an user can easily hack the application by changing system time of the device. So I might want to use a better method for retrieving time.
How can I do this? Is there an easy way to retrieve time from internet?
Checkout this Google Library: https://github.com/jbenet/ios-ntp
After the library is set up you can use it with the following line:
[NSDate networkDate];
A similar question has also been answered here: Get Date and Time from Apple Server
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Cocoa-Touch: How do I see if two NSDates are in the same day?
(12 answers)
Closed 8 years ago.
I would like to make an app where you get coins ever day.
How can i make a timer or something else who ckecks, wether the user already got the coin?
Can anyone please help me?
Store the time that the user got the coin in the user defaults.
Every time the application enter from the background check if the timeToGetAnotherCoin has passed.