cprovatas

import Foundation

extension Data {
    var prettyPrintedJSONString: NSString? { /// NSString gives us a nice sanitized debugDescription
        guard let object = try? JSONSerialization.jsonObject(with: self, options: []),
              let data = try? JSONSerialization.data(withJSONObject: object, options: [.prettyPrinted]),
              let prettyPrintedString = NSString(data: data, encoding: String.Encoding.utf8.rawValue) else { return nil }

        return prettyPrintedString
    }

ukiyoevega

func printAllSubviews(of view: UIView, from layer: Int) {
    for _ in 0..<layer {
        print(" ", separator: "", terminator: "")
    }
    print("\(view): ")
    let subView = view.subviews
    if subView.count != 0 {
        subView.forEach({ (view) in
            printAllSubviews(of: view, from: layer + 1)
        })

simonbromberg

// List all fonts on iPhone
NSArray *familyNames = [[NSArray alloc] initWithArray:[UIFont familyNames]];

for (NSString *family in familyNames) {
    NSLog(@"Family name: %@", family);
    
    fontNames = [UIFont fontNamesForFamilyName: family];
    for (NSString *font in fontNames) {
        NSLog(@"    Font name: %@", font);
    }

khanlou

        UIFont.familyNames.forEach({ familyName in
            let fontNames = UIFont.fontNames(forFamilyName: familyName)
            print(familyName, fontNames)
        })

mortenjust

func usesAMPM() -> Bool {
    let locale = NSLocale.currentLocale()
    let dateFormat = NSDateFormatter.dateFormatFromTemplate("j", options: 0, locale: locale)!
    if dateFormat.rangeOfString("a") != nil {
        return true
    }
    else {
        return false
    }
}

jtbandes

// Would you rather use this:

NSLayoutConstraint(item: label, attribute: .Leading, relatedBy: .Equal, toItem: button, attribute: .Trailing, multiplier: 1, constant: 0).active = true

// or this?

label.constrain(.Leading, .Equal, to: button, .Trailing, plus: 20)

licvido

import UIKit

class ViewController: UIViewController, UITableViewDelegate, UITableViewDataSource {

    @IBOutlet var tableView: UITableView!
    
    var itemsInSections: Array<Array<String>> = [["1A", "1B", "1C"], ["2A", "2B"], ["3A", "3B", "3C", "3D", "3E"]]
    var sections: Array<String> = ["Section 1", "Section 2", "Section 3"]
    
    

jbergen

for family in UIFont.familyNames() {
  let sName: String = family as String
  println("family: \(sName)")

  for name in UIFont.fontNamesForFamilyName(sName) {
    println("name: \(name as String)")
  }
}

spotlessicode

- (UIStoryboardSegue *)segueForUnwindingToViewController:(UIViewController *)toViewController fromViewController:(UIViewController *)fromViewController identifier:(NSString *)identifier
{
    
    //how to set identifier for an unwind segue:
    
    //1. in storyboard -> documento outline -> select your unwind segue
    //2. then choose attribute inspector and insert the identifier name
    if ([@"UnwindFromSecondView" isEqualToString:identifier]) {
        return [[MyCustomUnwindSegue alloc] initWithIdentifier:identifier source:fromViewController destination:toViewController];
    }else {

Duraiamuthan

UUID: 
 It is the acronym of Universally Unique Identifier.
 A sequence of 128 bits that can guarantee uniqueness across space and time, defined by RFC 4122.

GUID:
 It is the acronym of Globally Unique Identifier
 It is Microsoft's implementation of the UUID specification; often used interchangeably with UUID.
 In dot net framework its called as Plain GUID and in sql server its called as newid

UDID: