iOS: Remove left gap from row separator

Objective C

#pragma mark - UITableViewDelegate method

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath

{

    // Remove seperator inset

    if ([cell respondsToSelector : @selector (setSeparatorInset :)]) {

        [cell setSeparatorInset : UIEdgeInsetsZero ];

    }

    

    // Prevent the cell from inheriting the Table View's margin settings

    if ([cell respondsToSelector : @selector (setPreservesSuperviewLayoutMargins :)]) {

        [cell setPreservesSuperviewLayoutMargins : NO ];

    }

    

    // Set Your explictly cell's layout margins

    if ([cell respondsToSelector : @selector (setLayoutMargins :)]) {

        [cell setLayoutMargins : UIEdgeInsetsZero ];

    }

}

Swift

// In viewDidLoad
tableView?.cellLayoutMarginsFollowReadableWidth = false

func tableView(_ tableView: UITableView, willDisplay cell: UITableViewCell, forRowAt indexPath: IndexPath) {
        if cell.responds(to: #selector(setter: UITableViewCell.separatorInset)) {
            cell.separatorInset = UIEdgeInsets.zero
        }
        if cell.responds(to: #selector(setter: UIView.preservesSuperviewLayoutMargins)) {
            cell.preservesSuperviewLayoutMargins = false
        }
        if cell.responds(to: #selector(setter: UIView.layoutMargins)) {
            cell.layoutMargins = UIEdgeInsets.zero
        }
    }

iOS: Navigation bar with custom font

Swift

self.navigationBar.titleTextAttributes = [ NSFontAttributeName: UIFont(name: "Questrial-Regular", size: 15)!, NSForegroundColorAttributeName: UIColor.whiteColor()]

iOS: Transparent navigation bar

Swift
        self.navigationBar.shadowImage = UIImage()

        self.navigationBar.isTranslucent = true

        self.navigationBar.setBackground(UIImage(), forBarMetrics: .default)

iOS: Setup navigation bar

Swift

On .plist:
View controller-based status bar appearance -> YES

private func _setupNavigationBar() -> Void {

        

        self.navigationBar.shadowImage = nil;

        self.navigationBar.translucent = false;

        self.navigationBar.barTintColor = UIColor.clearColor() // Bar background color

        self.navigationBar.titleTextAttributes = [NSForegroundColorAttributeName: UIColor.whiteColor()] // Title text color

        self.navigationBar.setBackgroundImage(nil, forBarMetrics: .Default) // No background image with background clear color makes the bar transparent

    }

override var preferredStatusBarStyle: UIStatusBarStyle {

        return .lightContent

    }

Note: 

1) If on a presented view controller:

On presenter view controller:

override var childViewControllerForStatusBarHidden: UIViewController? {

        return self.presentedViewController

    }

    

    override var childViewControllerForStatusBarStyle: UIViewController? {

        return self.presentedViewController

    }

On presented view controller:

override var preferredStatusBarStyle: UIStatusBarStyle {

        return .lightContent

    }

    

    override var prefersStatusBarHidden: Bool {

        return false

    }

2) CARE Status bar's background color will be the views background color

iOS: Generate amazon signature

NSMutableArray* array = @[ [NSString stringWithFormat:@"AWSAccessKeyId=%@", self.credentials[@"AWSAccessKeyId"]],
                                   [NSString stringWithFormat:@"AssociateTag=%@", self.credentials[@"AssociateTag"]],
                                   @"Availability=Available",
                                   [NSString stringWithFormat:@"Keywords=%@", [string urlencode]],
                                   @"Operation=ItemSearch",
                                   @"ResponseGroup=Medium",
                                   // [NSString stringWithFormat:@"SearchIndex=%@", category],
                                   @"SearchIndex=All",
                                   @"Service=AWSECommerceService-Y",
                                   [NSString stringWithFormat:@"Timestamp=%@", [[DateHelper UTFStringFromDate:[NSDate date]] urlencode]]
                                   ].mutableCopy;

if (page != 0) {
    [array insertObject:[NSString stringWithFormat:@"ItemPage=%ld", page] atIndex:3];
}
       
[array addObject:[NSString stringWithFormat:@"Signature=%@", [self _getSignatureFromParams:array]]];

...

- (NSString*)_getSignatureFromParams:(NSArray*)params
{
    NSString* paramsString = [params componentsJoinedByString:@"&"];
   
    NSString* string = [NSString stringWithFormat:@"GET\nwebservices.amazon.com\n/onca/xml\n%@", paramsString];
   
    NSData *keyData = // AWSSecretKey"
    NSData *paramData = [string dataUsingEncoding:NSUTF8StringEncoding];
    NSMutableData* hash = [NSMutableData dataWithLength:CC_SHA256_DIGEST_LENGTH ];
    CCHmac(kCCHmacAlgSHA256, keyData.bytes, keyData.length, paramData.bytes, paramData.length, hash.mutableBytes);
   
    return [[hash base64EncodedStringWithOptions:0] urlencode];

}

Swift: Add icon to label

let attachment: NSTextAttachment = NSTextAttachment()

        attachment.image = UIImage(named: "information icon")

        attachment.bounds = CGRect(x: 0, y: -5, width: attachment.image!.size.width, height: attachment.image!.size.height)

        

        let attachmentString: NSAttributedString = NSAttributedString(attachment: attachment)

        let attributedText: NSMutableAttributedString = NSMutableAttributedString()

        attributedText.append(attachmentString)

        attributedText.append(NSAttributedString(string: " We will never post anything to Facebook"))

        

        informationLabel.attributedText = attributedText

Swift: Tex with various colors or formats

        let differentColorText: String = "60 seconds"

        

        let fullText: NSString = "Match when you engage\nmore than 60 seconds in\na conversation."

        

        let range: NSRange = fullText.rangeOfString(differentColorText)

        

        let string: NSMutableAttributedString = NSMutableAttributedString(string: "Match when you engage\nmore than 60 seconds in\na conversation.")

        string.addAttribute(NSForegroundColorAttributeName, value: UIColor.lightGrayColor(), range: range)

        

        titleLabel.attributedText = string

iOS: UITableView add selected background and select row

Cell:

- (void)awakeFromNib

{

    UIView *selectionColor = [[UIView alloc] init];

    selectionColor.backgroundColor = [ColorHelper sickGreen];

    self.selectedBackgroundView = selectionColor;

}

ViewController containing table view:

- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath

{

   // Set selected or not selected here. Doing it anywhere else has no result because prior to showing

   // the cell iOS sets selected to NO after that this method is called

}

iOS: Change statusbar background color

- (void)_setStatusBarBackgroundColor:(UIColor *)color

{

    UIView *statusBar = [[[UIApplication sharedApplication] valueForKey:@"statusBarWindow"] valueForKey:@"statusBar"];

    

    if ([statusBar respondsToSelector:@selector(setBackgroundColor:)])

    {

        statusBar.backgroundColor = color;

        

    }

}