Converting Milliseconds to readable Time (hh:mm:ss) format

String convertMS(int ms) {
    int seconds = (int) ((ms / 1000) % 60);
    int minutes = (int) (((ms / 1000) / 60) % 60);
    int hours = (int) ((((ms / 1000) / 60) / 60) % 24);

    String sec, min, hrs;
    if(seconds<10 0="" code="" else="" hours="=" hrs="" if="" min="" minutes="" return="" sec="" seconds="">

In Swift:

func convertMilliSeconds(milliSeconds : NSNumber) -> String

    {

        let seconds = (milliSeconds.integerValue / 1000) % 60

        let minutes = ((milliSeconds.integerValue / 1000) / 60) % 60

        let hours = (((milliSeconds.integerValue / 1000) / 60) / 60) % 24

        

        var sec : String

        var min : String

        var hrs: String

        if seconds<10

        {

            sec = "0\(seconds)"

        }

        else

        {

            sec = "\(seconds)"

        }

        if(minutes<10)

        {

            min = "0\(minutes)"

        }

        else

        {

            min = "\(minutes)"

        }

        if(hours<10)

        {

            hrs = "0\(hours)"

        }

        else

        {

            hrs = "\(hours)"

        }

        

        if(hours == 0)

        {

            return "\(min):\(sec)"

        }

        else

        {

            return "\(hours):\(minutes):\(seconds)"

        }

        

    }

[__NSCFNumber length]: unrecognized selector sent to instance

If you get any of these runtime errors/warnings:
[__NSCFNumber length]: unrecognized selector sent to instance
restkit.object_mapping:RKMappingOperation.m: Coercing NSNull value to nil in shouldSetValue:atKeyPath: -- should be fixed

class User: NSObject {

    var userId: String?

    var userImageUrl: String?

}

Check whether server is sending JSON response not as String like
{
  "id":12345
  "avatar_url":""
}

Solution:

Such error causing properties should be defined as NSObject

class User: NSObject {

    var userId: NSObject?

    var userImageUrl: String?

}

Overriding isEqual in Swift

class MyClass: NSObject {

    var value = 5

    override func isEqual(object: AnyObject?) -> Bool {
        if let object = object as? MyClass {
            return value == object.value
        } else {
            return false
        }
    }

    override var hash: Int {
        return value.hashValue
    }
}
var x = MyClass()
var y = MyClass() 

x.isEqual(y) // true

Instagram iOS SDK integration

Get it here
https://github.com/crino/instagram-ios-sdk

Errs:

{ "code": 403, "error_type": "OAuthForbiddenException", "error_message": "Implicit authentication is disabled" }

Follow these steps:

• Go to https://instagram.com/developer/
• Manage Clients
• Click edit on the app/webapp.
• Uncheck - Disable implicit OAuth:
• Update the settings

{ "code": 400, "error_type": "OAuthException", "error_message": "Redirect URI does not match registered redirect URI" }

Make sure REDIRECT URI is set to ig[clientId]://authorize
while registering application on Instagram website.

Adding Notifications in Swift

Post Notification:

NSNotificationCenter.defaultCenter().postNotificationName("NotificationIdentifier", object: nil)




Add Observer for Notification in ViewWillAppear:

          

NSNotificationCenter.defaultCenter().addObserver(self, selector: "methodOfReceivedNotification:", name:"NotificationIdentifier", object: nil)

Remove in ViewWillDisappear:

        

NSNotificationCenter.defaultCenter().removeObserver(self, name: "NotificationIdentifier", object: nil)Remove in ViewWillDisappear:

Selector Method:

func methodOfReceivedNotification(notification: NSNotification){
    //Action on Notification
}