iOS Referrals (Objective C and Swift)

31 Oct 2019

Codable demo

Link: https://www.dropbox.com/s/kw7c1kgv1628bh7/codableDemo.zip?dl=0

22 Nov 2018

To Run a method using Timer in background mode Swift..

If you want to run a code when app is in background state use below code :

var bgTask = UIBackgroundTaskIdentifier()
bgTask = UIApplication.shared.beginBackgroundTask(expirationHandler: {

UIApplication.shared.endBackgroundTask(bgTask)

})
let timer = Timer.scheduledTimer(timeInterval: 20, target: self, selector: #selector(notificationReceived), userInfo: nil, repeats: true)
RunLoop.current.add(timer, forMode: RunLoopMode.defaultRunLoopMode)

@objc func notificationReceived () {

Print("Code here")

}

16 Mar 2018

How to give a Bottom line to a TextField iOS...

To give a underline to textField (Only bottom border) line use the following code:

Here we use CALayer class to achieve it,

-(void)underlineToTextField:(UITextField *)txtField

{

CALayer *border = [CALayer layer];

CGFloat borderWidth = 0.8f;

border.borderColor = [UIcolor greenColor].CGColor;

border.frame = CGRectMake(0, text.frame.size.height - borderWidth, ([[UIScreen mainScreen] bounds].size.width)-32, text.frame.size.height);

border.borderWidth = borderWidth;

[text.layer addSublayer:border];

text.layer.masksToBounds = YES;

}

Call the method for which TextField you want to show underline like below,

[self underlineToTextField:textField];

How to make Shadow effect for View or Button.. etc on 4 sides iOS objective c...

Take UIView or Button... etc and make a Shadow effect as shown use the following code:

Set masks bounds to NO to display shadow visible

_viewBg.layer.masksToBounds = NO;

Set shadow Color

_viewBg.layer.shadowColor = [[UIColor colorWithRed:0 green:0 blue:0 alpha:0.25f] CGColor];

Set Shadow radius

_viewBg.layer.shadowRadius = 5.0f; // values depends on View Size

1) Use following to add Shadow top, left of View

_viewBg.layer.shadowOffset = CGSizeMake(-2.0f, -2.0f); // values depends on View Size

2) Use following to add Shadow bottom, right of View

_viewBg.layer.shadowOffset = CGSizeMake(2.0f, 2.0f); // values depends on View Size

3) Use following to add Shadow top, left, bottom, right of View

_viewBg.layer.shadowOffset = CGSizeZero;

4) Set Shadow opacity to full

_viewBg.layer.shadowOpacity = 1.0f;

11 Dec 2017

Expandable tableView Code Objective C...

#import <UIKit/UIKit.h>

@interface ViewController : UIViewController <UITableViewDelegate,UITableViewDataSource>

@property (weak, nonatomic) IBOutlet UITableView *expandTableView;

@end

#import "ViewController.h"

@interface ViewController ()

{

NSMutableArray *mainCategory;

NSMutableArray *subCategory;

NSMutableArray *expandStatusArray;

}

@end

@implementation ViewController

- (void)viewDidLoad {

[super viewDidLoad];

//Intialize the main Category

self.expandTableView.sectionFooterHeight = 0;

mainCategory = [[NSMutableArray alloc] initWithObjects:@"MEN",@"WOMEN",@"KIDS",@"RECHARGE", nil];//@[@"",@"",@"",@""];

subCategory = [[NSMutableArray alloc] initWithObjects:@[@"Cloths",@"Watches",@"Footwear"],@[@"Cloths",@"Jewellery",@"Footwear",@"Bangles"],@[@"Cloths",@"Toys"],@[@"Jio",@"Bsnl",@"Airtel",@"Uninor",@"Idea",@"vodafone"], nil];

expandStatusArray = [[NSMutableArray alloc] initWithObjects:@"1",@"0",@"0",@"0",nil];

//@YES for expand the cell

//@NO for close the cell

// Do any additional setup after loading the view, typically from a nib.

}

- (void)didReceiveMemoryWarning {

[super didReceiveMemoryWarning];

// Dispose of any resources that can be recreated.

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView{

return mainCategory.count;

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

NSString * status = [expandStatusArray objectAtIndex:section];

if ([status isEqualToString:@"1"]) {

NSArray *subArray = [subCategory objectAtIndex:section];

return subArray.count;

}

return 0;

}

// Row display. Implementers should *always* try to reuse cells by setting each cell's reuseIdentifier and querying for available reusable cells with dequeueReusableCellWithIdentifier:

// Cell gets various attributes set automatically based on table (separators) and data source (accessory views, editing controls)

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cellID"];

if (cell == nil) {

cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:@"cellID"];

}

NSArray *subArray = [subCategory objectAtIndex:indexPath.section];

NSString *dataStr = [subArray objectAtIndex:indexPath.row];

cell.textLabel.text = dataStr;

return cell;

}

- (UIView *)tableView:(UITableView *)tableView viewForHeaderInSection:(NSInteger)section{

//Programatically create the view

CGRect viewFrame = CGRectMake(0, 0, tableView.frame.size.width, 50);

UIView *headerView = [[UIView alloc] initWithFrame:viewFrame];

headerView.backgroundColor = [UIColor colorWithRed:76.0f/255.0f green:139.0f/255.0f blue:245.0f/255.0f alpha:1.0f];

//Crate label programatically

UILabel *headerLbl = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 200, 50)];

headerLbl.text = [mainCategory objectAtIndex:section];

headerLbl.textAlignment = NSTextAlignmentCenter;

[headerView addSubview:headerLbl];

UIButton *expandBtn = [[UIButton alloc] initWithFrame:CGRectMake(tableView.frame.size.width-50, 0, 50, 50)];

expandBtn.titleLabel.text = @"+";

expandBtn.backgroundColor = [UIColor redColor];

[headerView addSubview:expandBtn];

expandBtn.tag = section;

[expandBtn addTarget:self action:@selector(expandCell:) forControlEvents:UIControlEventTouchUpInside];

return headerView;

}

- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{

return 50;

}

- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section{

return 0;

}

- (void)expandCell:(UIButton*)button{

NSString * status = [expandStatusArray objectAtIndex:button.tag];

if ([status isEqualToString:@"1"]) {

//Replace with o

[expandStatusArray replaceObjectAtIndex:button.tag withObject:@"0"];

}else{

//Replace with 1

[expandStatusArray replaceObjectAtIndex:button.tag withObject:@"1"];

}

[_expandTableView reloadData];

}

30 Nov 2017

How to Shuffle an Array in Swift...

If you want to shuffle an array use the following method pass an array get the Shuffled Array,

self.shuffledArray = self.ShuffleArray(answersArray: self.answersArray)

func ShuffleArray(answersArray:[String]) -> [String] {

var items = answersArray

var shuffled = [String]();

for _ in 0..<items.count

{

let rand = Int(arc4random_uniform(UInt32(items.count)))

shuffled.append(items[rand])

items.remove(at: rand)

}

return shuffled

}

29 Nov 2017

How to add two NSDictionaries in Swift...

The below code is an example of adding two dictionaries,

var dict1 = ["One": "1","Two": "2","Three": "3","Four": "4"]

let dict2 = ["Five": "5","Six": "6","Seven": "7","Eight": "8"]

dict2.forEach { (k,v) in dict1[k] = v }

print("Combined dictionary ===> ",dict1)

And the Result is,

Result: Combined dictionary ===> ["Two": "2", "Five": "5", "Three": "3", "Four": "4", "Six": "6", "One": "1", "Eight": "8", "Seven": "7"]

How to add two NSDictionaries into NSMutableDictionary Objective C...

The below code is an example of Adding Two Dictionaries into a Single mutableDictionary ,

NSDictionary *dict1= [NSDictionary dictionaryWithObjectsAndKeys:@"1",@"One",@"2",@"Two",@"3",@"Three",@"4",@"Four", nil];

NSDictionary *dict2 = [NSDictionary dictionaryWithObjectsAndKeys:@"5",@"Five",@"6",@"Six",@"7",@"Seven",@"8",@"Eight",nil];

NSMutableDictionary *dictMerged = [NSMutableDictionary dictionaryWithDictionary: dict1];

[dictMerged addEntriesFromDictionary: dict2];

NSLog(@"dictMerged===> %@",dictMerged);

Result: dictMerged===> {

Eight = 8;

Five = 5;

Four = 4;

One = 1;

Seven = 7;

Six = 6;

Three = 3;

Two = 2;

}

27 Nov 2017

How to Create a Global UIAlertController in Swift...

Add this code in any Class (As UIViewController extension) as shown below

extension UIViewController {

func alert(message: String, title: String ) {

let alertController = UIAlertController(title: title, message: message, preferredStyle: .alert)

let OKAction = UIAlertAction(title: "OK", style: .default, handler: nil)

alertController.addAction(OKAction)

self.present(alertController, animated: true, completion: nil)

}

and call it anywhere(In Any ViewController) as shown below,

self.alert(message: "Some message", title: "Title of Alert")

29 Sept 2017

How to set different colour Font text to single Label(Attributed Text)...

-(NSAttributedString *)AttrStr:(NSString *)str1 fontString:(NSString *)str2 {

NSDictionary *dict1;

NSDictionary *dict2;

dict1 = @{NSFontAttributeName:[UIFont fontWithName:promptLight size:10.0],NSForegroundColorAttributeName:[UIColor colorWithRed:127/255.0 green:127/255.0 blue:127/255.0 alpha:1.0]};

dict2 = @{NSFontAttributeName:[UIFont fontWithName:promptLight size:10.0],NSForegroundColorAttributeName:[UIColor colorWithRed:78/255.0 green:186/255.0 blue:222/255.0 alpha:1.0]};

NSMutableAttributedString *attString = [[NSMutableAttributedString alloc] init];

[attString appendAttributedString:[[NSAttributedString alloc] initWithString:str1 attributes:dict1]];

[attString appendAttributedString:[[NSAttributedString alloc] initWithString:str2 attributes:dict2]];

return attString;

}

cell.LSALbl.attributedText = [self AttrStr:@"LSA: " fontString:[NSString stringWithFormat:@"%ld",lroundf([_productionDataObj.lsaPlanned floatValue])]];

How to set background image to Navigation bar...

UINavigationBar *navBar = self.navigationController.navigationBar;

UIImage *img = [UIImage imageNamed:@"navImg.png"];

[navBar setContentMode:UIViewContentModeScaleAspectFit];

[navBar setBackgroundImage:img forBarMetrics:UIBarMetricsDefault];

How to give different (Mixing of = Gradient colours)colours to View...

@property (weak, nonatomic) IBOutlet UIView *navBgView;

CAGradientLayer *gradientMask = [CAGradientLayer layer];

gradientMask.frame = CGRectMake(0, 0, self.view.frame.size.width, 150);

gradientMask.startPoint = CGPointMake(0.0, 0.5); // start at left middle

gradientMask.endPoint = CGPointMake(1.0, 0.5); // end at right middle

gradientMask.colors = @[(id)[UIColor colorWithRed:91/255.0 green:232/255.0 blue:200/255.0 alpha:0.7].CGColor,

(id)[UIColor colorWithRed:91/255.0 green:232/255.0 blue:200/255.0 alpha:0.7].CGColor,

(id)[UIColor colorWithRed:91/255.0 green:232/255.0 blue:200/255.0 alpha:0.5].CGColor,

(id)[UIColor colorWithRed:85/255.0 green:188/255.0 blue:222/255.0 alpha:0.5].CGColor,

(id)[UIColor colorWithRed:85/255.0 green:188/255.0 blue:222/255.0 alpha:0.7].CGColor,

(id)[UIColor colorWithRed:85/255.0 green:188/255.0 blue:222/255.0 alpha:0.7].CGColor];

gradientMask.locations = @[@0.0, @0.10, @0.40, @0.80, @0.90, @1.0];

[_navBgView.layer insertSublayer:gradientMask atIndex:0];

How to give a border to View or Cell like shown...

cell.layer.cornerRadius = 8.0;

cell.layer.shadowOffset = CGSizeMake(-1, -1);

cell.layer.shadowRadius = 3.0;

cell.layer.shadowOpacity = 0.2;

cell.layer.masksToBounds = NO;

[cell.layer setShadowColor: [UIColor blackColor].CGColor];

How to add Borderline to View...

@property (weak, nonatomic) IBOutlet UIView *topView;

// Add a bottomBorder.

CALayer *bottomBorder = [CALayer layer];

bottomBorder.frame = CGRectMake(0.0f, 39.0f, self.view.frame.size.width, 0.8f);

bottomBorder.backgroundColor = [[UIColor lightGrayColor] colorWithAlphaComponent:0.2].CGColor;

[_topView.layer addSublayer:bottomBorder];

12 Aug 2017

How to make TabBar Transparent...

// Add this in App delegate...

[[UITabBar appearance] setBarTintColor:[UIColor clearColor]];

[[UITabBar appearance] setBackgroundImage:[UIImage new]];

How to Validate phone Number...

BOOL value=[self validatePhone:[NSString stringWithFormat:@"%@",PhoneNumberTF.text]];

#pragma – mark PhoneNumber Validation Method

/**

PhoneNumber validation

@param phoneNumber => phoneNumber from phoneNumberTF text

@return => Bool

-(BOOL)validatePhone:(NSString *)phoneNumber

{

NSString *phoneRegex = @"^((\\+)|(00))[0-9]{6,14}$";

NSPredicate *phoneTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", phoneRegex];

return [phoneTest evaluateWithObject:phoneNumber];

}

How to animate textField on the top of Keyboard while Editing...

#pragma – mark Textfield Delegate Methods..

-(void)textFieldDidBeginEditing:(UITextField *)textField {

[self animateTextField:textField up:YES withOffset:textField.frame.origin.y / 2];

}

-(void)textFieldDidEndEditing:(UITextField *)textField {

[self animateTextField:textField up:NO withOffset:textField.frame.origin.y / 2];

}

#pragma – mark Textfield Animation Method

-(void)animateTextField:(UITextField*)textField up:(BOOL)up withOffset:(CGFloat)offset

{

const int movementDistance = -offset;

const float movementDuration = 0.4f;

int movement = (up ? movementDistance : -movementDistance);

[UIView beginAnimations: @"animateTextField" context: nil];

[UIView setAnimationBeginsFromCurrentState: YES];

[UIView setAnimationDuration: movementDuration];

self.view.frame = CGRectOffset(self.view.frame, 0, movement);

[UIView commitAnimations];

}

1 Jul 2017

Custom TableView cell registerNib Code...

#import "ViewController.h"

#import "TableViewCell.h" //Custom TableViewCell class

@interface ViewController ()

@end

static NSString* const cellIdentifier = @"TableViewCellid";

@implementation ViewController

- (void)viewDidLoad {

    [super viewDidLoad];

    // Do any additional setup after loading the view.

    self.TableView.tableFooterView = [[UIView alloc] initWithFrame:CGRectZero];

    self.TableView.estimatedRowHeight = 44.0;

    self.TableView.rowHeight = UITableViewAutomaticDimension;

    self.TableView.delegate = self;

    self.TableView.dataSource = self;

    UINib *nib= [UINib nibWithNibName:@"TableViewCell" bundle:nil];

    [self.TableView registerNib:nib forCellReuseIdentifier:cellIdentifier];

}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{

    return 10;

}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath{

    TableViewCell *cell = [self.TableView dequeueReusableCellWithIdentifier:cellIdentifier];

    if (cell == nil) {

        cell = [[TableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdentifier];

}

    return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

}