create new parse app
download parse sdk for ios
create new project - master detail
go to build settings
    under search paths >> framework search paths >>
        1) debug - add $(PROJECT_DIR)/**
        2) release - add $(PROJECT_DIR)/**
go to general tab
    under Linked frameworks and libraries, 
        Add the following frameworks from parse SDK
            Parse.framework
            ParseCrashReporting.framework
            Bolts.framework
            ParseUI.framework
        Also add the below frameworks
            AudioToolbox.framework
            SystemConfiguration.framework
        Add the below frameworks using "Add framewors popup" -->> Add other -->> ctrl+shift+g --> enter /usr/lib/ -->>
            choose the following
                1) libz.1.dylib
                2) libsqlite3.dylib
create new file -->> chose Objective-C type -->>create.
    Xcode will ask you whether you want to create a bridging header? select yes.
    it create 2 files. one is .m file and one is .h file
    go to .h file, add the following line
        #import 
Open up the AppDelegate.swift file, uncomment and edit the setApplicationId line in the application:didFinishLaunchingWithOptions function with your keys:
Example:
Parse.setApplicationId("sJjEQei2m15RD9MJiZjVtygI1o6wQ23TxhdIllUo", 
  clientKey: "IZDfhmPiO2b01yEacRBAStyKAznXrguFku78pWO3")
Test the SDK
First make sure to include our SDK imports at the top of your ViewController.swift file:
import Parse
Then copy and paste this code into your app, for example in the viewDidLoad function of ViewController.swift:
let testObject = PFObject(className: "TestObject")
testObject["foo"] = "bar"
testObject.saveInBackgroundWithBlock { (success: Bool, error: NSError?) -> Void in
  print("Object has been saved.")
}
Run your app. A new object of class TestObject will be sent to the Parse Cloud and saved. When you're ready, click the button below to test if your data was sent.