Technology Makes A Wonderful World
Many of the types are bridged to the Swift type like as (e.g., NSString being bridged to String).
Other Objective-C types are bridged to Swift are as follows :
| Objective-C | Swift |
|---|---|
| NSString | String |
| NSArray | Array |
| NSDictionary | Dictionary |
| NSData | Data |
| NSError | Error (Added Swift 3 – Xcode 8 Beta 4) |
| NSNotificationCenter | NotificationCenter |
And more…
Bye Bye to NS from Swift!!
Happy Coding 🙂
New version of SDK is 4.16.x(Swift) and Graph API Version is 2.8.
With the Graph API 2.6 Facebook has given support to fetch (read only) the Reactions on Timeline Posts.
Post is updated for iOS 10 and Swift 3
API documentation is available here.
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# Uncomment the next line to define a global platform for your project platform :ios, '9.0' target 'FBSwiftLogin' do # Comment the next line if you're not using Swift and don't want to use dynamic frameworks use_frameworks! # Pods for FBSwiftLogin pod 'FacebookCore' pod 'FacebookLogin' end |
I have already written a tutorial on Facebook Login.
We can get the Facebook post via graph API : /me/posts for that we have to add user_posts permission with login.
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func getFacebookUserPosts() { FBSDKGraphRequest(graphPath: "/me/posts", parameters: nil, httpMethod: "GET").start(completionHandler: { (connection, result, error) in if (error == nil){ print(result) } }) } |
We can get the Facebook post reactions via graph API : /{post-id}/reactions. We have to pass parameters like fields and summary as described in getReactions function.
Note : Here I am writing sample for only first post.
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func getFacebookUserPosts() { var strGraphPath : String = "" FBSDKGraphRequest(graphPath: "/me/posts", parameters: nil, httpMethod: "GET").start(completionHandler: { (connection, result, error) in if (error == nil){ print(result) let data = (result as! [String : Any])["data"] as! [[String : Any]] if(data.count > 0) { let strId = data[0]["id"] as! String strGraphPath = "/"+strId+"/reactions" self.getReactions(strGraphPath) } } }) } func getReactions(_ strGraphPath:String) { FBSDKGraphRequest(graphPath: strGraphPath, parameters: ["fields":"id, name, type", "summary":"total_count, viewer_reaction"], httpMethod: "GET").start(completionHandler: { (connection, result, error) in if (error == nil){ print(result) } }) } |
Type of reactions : NONE, LIKE, LOVE, WOW, HAHA, SAD, ANGRY
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{ data = ( { id = ACCOUNT_ID; name = "NAME"; type = HAHA; }, { id = ACCOUNT_ID; name = "NAME"; type = LIKE; } ); paging = { cursors = { after = REFERENCE_ID; before = REFERENCE_ID; }; next = "NEXT_REFERENCE_LINK"; }; summary = { "total_count" = 56; "viewer_reaction" = NONE; }; } |
#Like #Share #React 🙂 😛 😀
Happy coding 🙂
I was just going through the Swift document and I found that Swift allow to overload the operator just like as C++ Language. Objective-C doesn’t allow to overload the operator.
As swift document we can also say “Operator Functions”.
Function Prototype :
Declare function prototype with left hand side value and right and side value.
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func ^(lhs: Int, rhs: Int) -> Int { } |
Operations in the function :
To make the power of the value we have to apply following operations
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func ^(lhs: Int, rhs: Int) -> Int { if(rhs == 0) { return 1 } else { var result = lhs for _ in 1 ..< rhs { result *= lhs } return result } } |
Let’s try to use with the operator :
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let a = 2^2 //4 let b = 2^4 //16 let c = 3^3 //27 |
Happy Coding 🙂
Xcode 7.3 came with Swift 2.2 Version. I just updated to Xcode 7.3 and found following warnings because of Swift version change.
Warning with:
[code language=”obj-c”]
func functionTest(var param:String) {
print(param)
}
[/code]
Solution:
[code language=”obj-c”]
func functionTest(param:String) {
print(param)
}
[/code]
If you want to update that variable inside the function then you have to create copy of that variable to do operations on that.
Warning with:
[code language=”obj-c”]
btn.addTarget(self, action: "functionName", forControlEvents: UIControlEvents.TouchUpInside)
[/code]
OR
[code language=”obj-c”]
btn.addTarget(self, action: Selector("functionName"), forControlEvents: UIControlEvents.TouchUpInside)
[/code]
Solution:
[code language=”obj-c”]
btn.addTarget(self, action: #selector(ViewController.functionName), forControlEvents: UIControlEvents.TouchUpInside)
[/code]
Apple Documentation : Added information about the #selector syntax for Objective-C selectors to the Selector Expression section.
Warning with:
[code language=”obj-c”]
var i = 0
for str in arrStr {
print(str)
i++
}
[/code]
Solution:
[code language=”obj-c”]
var i = 0
for str in arrStr {
print(str)
i += 1
}
[/code]
Apple Documentation : Removed discussion of C-style for loops, the ++ prefix and postfix operators, and the — prefix and postfix operators.
Warning with:
[code language=”obj-c”]
for var i=0; i<arrStr.count; i += 1 {
print(arrStr[i])
}
[/code]
Solution:
[code language=”obj-c”]
for i in 0 ..< arrStr.count {
print(arrStr[i])
}
[/code]
Warning with:
[code language=”obj-c”]
__FILE__
[/code]
Solution:
[code language=”obj-c”]
#file
[/code]
More swift tutorials/articles are available here.
Happy Coding 🙂
Posted by @NatashaTheRobot in Issue No. 80
If I got time then I will try to post the Swift/Objective-C useful resources everyday.
Happy Coding 🙂
If I got time then I will try to post the Swift/Objective-C useful resources everyday.
Happy Coding 🙂
If I got time then I will try to post the Swift/Objective-C useful resources everyday.
Happy Coding 🙂
In Objective-C we are using a header file to create constant variables like as
[code lang=”obj-c”]
// Objective-C
#define APP_ALERT_TITLE "Objective-C Constant"
[/code]
Swift has new syntax to define the constant (#define)
[code lang=”obj-c”]
// Swift
let APP_ALERT_TITLE = "Swift Constants"
[/code]
[code lang=”obj-c”]
import Foundation
class Constants {
// MARK: List of Constants
static let APP_ALERT_TITLE = "Swift Constants"
static let SAMPLE_MESSAGE = "The alert is working !!"
}
[/code]
Note : Here the MARK statement is also changed.
[code lang=”obj-c”]
// Objective-C
#pragma mark –
#pragma mark List of Constants
[/code]
[code lang=”obj-c”]
// Swift
// MARK: List of Constants
[/code]
Alamofire is an HTTP networking library written in Swift.
SwiftyJSON makes it easy to deal with JSON data in Swift.
This article is updated with Swift 4 – Xcode 9 – iOS 11
Why to use a library everytime?
Let’s create our own Slide Menu (Drawer) in Swift 4.
1. Create New Project in Xcode 9 with Swift Language
2. Design the Menu in UIViewController
Declaration of Variables and Protocols (Delegate) :
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protocol SlideMenuDelegate { func slideMenuItemSelectedAtIndex(_ index : Int32) } class MenuViewController: UIViewController, UITableViewDataSource, UITableViewDelegate { /** * Array to display menu options */ @IBOutlet var tblMenuOptions : UITableView! /** * Transparent button to hide menu */ @IBOutlet var btnCloseMenuOverlay : UIButton! /** * Array containing menu options */ var arrayMenuOptions = [Dictionary<String,String>]() /** * Menu button which was tapped to display the menu */ var btnMenu : UIButton! /** * Delegate of the MenuVC */ var delegate : SlideMenuDelegate? } |
Following method is for updating the Items in the Menu :
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func updateArrayMenuOptions(){ arrayMenuOptions.append(["title":"Home", "icon":"HomeIcon"]) arrayMenuOptions.append(["title":"Play", "icon":"PlayIcon"]) tblMenuOptions.reloadData() } |
Following method is for click event and animation :
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@IBAction func onCloseMenuClick(_ button:UIButton!){ btnMenu.tag = 0 if (self.delegate != nil) { var index = Int32(button.tag) if(button == self.btnCloseMenuOverlay){ index = -1 } delegate?.slideMenuItemSelectedAtIndex(index) } UIView.animate(withDuration: 0.3, animations: { () -> Void in self.view.frame = CGRect(x: -UIScreen.main.bounds.size.width, y: 0, width: UIScreen.main.bounds.size.width,height: UIScreen.main.bounds.size.height) self.view.layoutIfNeeded() self.view.backgroundColor = UIColor.clear }, completion: { (finished) -> Void in self.view.removeFromSuperview() self.removeFromParentViewController() }) } |
3. Now we will create a Base UIViewController to use anywhere in the project which control the delegate of menu.
First we will create this 3 lines Drawer Icon via Code
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func addSlideMenuButton(){ let btnShowMenu = UIButton(type: UIButtonType.system) btnShowMenu.setImage(self.defaultMenuImage(), for: UIControlState()) btnShowMenu.frame = CGRect(x: 0, y: 0, width: 30, height: 30) btnShowMenu.addTarget(self, action: #selector(BaseViewController.onSlideMenuButtonPressed(_:)), for: UIControlEvents.touchUpInside) let customBarItem = UIBarButtonItem(customView: btnShowMenu) self.navigationItem.leftBarButtonItem = customBarItem; } func defaultMenuImage() -> UIImage { var defaultMenuImage = UIImage() UIGraphicsBeginImageContextWithOptions(CGSize(width: 30, height: 22), false, 0.0) UIColor.black.setFill() UIBezierPath(rect: CGRect(x: 0, y: 3, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 10, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 17, width: 30, height: 1)).fill() UIColor.white.setFill() UIBezierPath(rect: CGRect(x: 0, y: 4, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 11, width: 30, height: 1)).fill() UIBezierPath(rect: CGRect(x: 0, y: 18, width: 30, height: 1)).fill() defaultMenuImage = UIGraphicsGetImageFromCurrentImageContext()! UIGraphicsEndImageContext() return defaultMenuImage } |
Delegate (Protocol) method call :
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func slideMenuItemSelectedAtIndex(_ index: Int32) { let topViewController : UIViewController = self.navigationController!.topViewController! print("View Controller is : \(topViewController) \n", terminator: "") switch(index){ case 0: print("Home\n", terminator: "") self.openViewControllerBasedOnIdentifier("Home") break case 1: print("Play\n", terminator: "") self.openViewControllerBasedOnIdentifier("PlayVC") break default: print("default\n", terminator: "") } } |
To open a view controller by identifier :
Set the Restoration Identifier and Storyboard Identifier. If current view is open then we will not open it once again for that we have to check via Restoration Identifier.
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func openViewControllerBasedOnIdentifier(_ strIdentifier:String){ let destViewController : UIViewController = self.storyboard!.instantiateViewController(withIdentifier: strIdentifier) let topViewController : UIViewController = self.navigationController!.topViewController! if (topViewController.restorationIdentifier! == destViewController.restorationIdentifier!){ print("Same VC") } else { self.navigationController!.pushViewController(destViewController, animated: true) } } |
4. Now We will assign this drawer to any of the UIViewController
We have to use only one method to add drawer (slide menu) self.addSlideMenuButton()
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import UIKit class HomeVC: BaseViewController { override func viewDidLoad() { super.viewDidLoad() addSlideMenuButton() } } |
Source Code is available at the Github AKSwiftSlideMenu
You can download for versions of Swift 2, Swift 3 or Swift 4. From Releases Tab at GitHub AKSwiftSlideMenu.
Check other blog posts about Swift
Happy Coding 🙂