Facebook Video Upload on iOS using latest Facebook SDK for iOS(4.x)

 let videoData = NSData(contentsOfURL: NSURL.fileURLWithPath(path))

        

        if (hasGrantedPermission("publish_actions")) {

            

            var params = [String: AnyObject]()

            params["fields"] = ""

            params["video.mov"] = videoData

            params["contentType"] = "video/quicktime"

            params["description"] = "Test"

            FBSDKGraphRequest(graphPath: "/me/videos", parameters: params, HTTPMethod:"POST").startWithCompletionHandler {

                (connection, result, error) -> Void in

            }

        }

Detect idle time and do something when timer fires (Swift)

func resetIdleTimer()

    {

        if (idleTimer == nil)

        {

           idleTimer = NSTimer.scheduledTimerWithTimeInterval(kMaxIdleTimeSeconds, target: self, selector: "idleTimerExceeded:", userInfo: nil, repeats: false)

        }

        else

        {

           if (fabs(idleTimer.fireDate.timeIntervalSinceNow) < kMaxIdleTimeSeconds-1.0)

           {

               idleTimer.fireDate = NSDate(timeIntervalSinceNow: kMaxIdleTimeSeconds)

            

           }

        }

    }

    

    func idleTimerExceeded(sender: AnyObject)

    {

        idleTimer = nil

//do something when timer fires

    }

hide/show with animation in Swift

For hiding the dock like view and show again

 func hide(sender: AnyObject)

 {

     let frame = hideshowView?.frame

     let height = frame?.size.height

     let offsetY = height!

        

     //hide after 10 seconds delay

     if frame != nil {

     UIView.animateWithDuration(0.5, delay: 10.0, options: UIViewAnimationOptions.CurveEaseIn, animations: { [weak self] () -> Void in

                

                if let weakSelf = self

                {

                    weakSelf.segmentedControl?.frame = CGRectOffset(frame!, 0, offsetY)

                    weakSelf.openBottomBarButton.hidden = false

                }

            }) { (Bool v) -> Void in

            }

      }

 }

    

 func show(sender: AnyObject)

 {

        let frame =  hideshowView?.frame

        let height = frame?.size.height

        let offsetY = -height!

        

        //show without delay

        UIView.animateWithDuration(0.5)

        {

            hideshowView?.frame = CGRectOffset(frame!, 0, offsetY)

        

        }

}

Setting ImageView corner radius iOS, Swift

To get rounded image view

imageView.layer.cornerRadius = imageView.frame.size.width / 2

imageView.layer.masksToBounds = true

Check whether array contains element in Swift

extension Array {
    func contains<T where T : Equatable>(obj: T) -> Bool {
        return self.filter({$0 as? T == obj}).count > 0
    }
}

array.contains(element)

Also can use Dollar Framework: http://www.dollarswift.org

CocoaPods dependency errors

Analyzing dependencies

[!] Unable to satisfy the following requirements:

- `AFNetworking (= 1.3.4)` required by `Podfile.lock`

- `AFNetworking (~> 1.3.0)` required by `RestKit/Network (0.20.3)`

- `AFNetworking (~> 2.5)` required by `ABMSoundCloudAPI (0.1.0)`

References:

http://blog.cocoapods.org/CocoaPods-0.35/

Solution:

1. Fork the repository,
2. Make the changes or update dependencies
3. Install from the forked repository

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
}

Useful for getting the Table View Cell height containing Text

-(CGFloat)labelHeightForText:(NSString *)text

{

   CGFloat constrainedSize = 231.0; //or any other size

   UIFont *font = [UIFont fontWithName:@"Helvetica" size:17.0];

   CGSize textSize = [text sizeWithFont:font 

                      constrainedToSize:CGSizeMake(constrainedSize, CGFLOAT_MAX)

                          lineBreakMode:UILineBreakModeWordWrap];

   return textSize.height;

}