DenisLitvin

Summary

iOS Developer inclined to performant and well-crafted code. Build apps, games, instruments for developers. Expert in Objective-C and Swift. Have 4+ years of coding experience. 3 years in the iOS industry. A highly motivated and result-driven developer looking for opportunities that will provide me, both, personal and professional growth.

Career Highlights

•   Expertise in iOS, proficient with tvOS and watchOS. Familiar with Backend (Vapor) and Android development. 

•   Deep understanding of UI fundamentals (e.g. View Controller lifecycle, etc.). Made adaptive and sophisticated layouts in code as well as in Storyboards and Xibs. Worked with Auto-Layout and other alternatives. Developed my own layout engine. Have a great understanding of Human Interface Guidelines.

DenisLitvin

ViewController { 
    //somewhere in code, handling tap
    Router.present(ToVC.self, from: self)
}

extension ViewController: Routable {
    var someColor = UIColor.red

    var inputs: [Input] {

DenisLitvin

constrain(view1, view) { (view1, superview) in
    view1.leading == superview.leading + 20
    view1.trailing == superview.trailing - 20
    view1.top == superview.top + 40
    view1.height == 50
}
constrain(view2, view1, view) { (view2, view1, superview) in
    view2.leading == view1.leading
    view2.trailing == view1.trailing
    view2.top == view1.bottom + 10

DenisLitvin

view1.makeConstraints(for: .top, .leading, .trailing, .height) { (make) in
    make.pin(to: self.view.topAnchor, const: 40)
    make.pin(to: self.view.leadingAnchor, const: 20)
    make.pin(to: self.view.trailingAnchor, const: -20)
    make.equal(50)
}
view2.makeConstraints(for: .top, .leading, .trailing, .bottom) { (make) in
    make.pin(to: view1.bottomAnchor, const: 10)
    make.pin(to: view1.leadingAnchor)
    make.pin(to: view1.trailingAnchor)

DenisLitvin

view1.snp.makeConstraints { (make) in
    make.leading.equalTo(view).offset(20)
    make.trailing.equalTo(view).offset(-20)
    make.top.equalTo(view).offset(40)
    make.height.equalTo(50)
}

view2.snp.makeConstraints { (make) in
    make.leading.equalTo(view1)
    make.trailing.equalTo(view1)

DenisLitvin

view1.leadingAnchor.constraint(equalTo: view.leadingAnchor, constant: 20).isActive = true
view1.trailingAnchor.constraint(equalTo: view.trailingAnchor, constant: -20).isActive = true
view1.topAnchor.constraint(equalTo: view.topAnchor, constant: 40).isActive = true
view1.heightAnchor.constraint(equalToConstant: 50).isActive = true

view2.leadingAnchor.constraint(equalTo: view1.leadingAnchor).isActive = true
view2.trailingAnchor.constraint(equalTo: view1.trailingAnchor).isActive = true
view2.topAnchor.constraint(equalTo: view1.bottomAnchor, constant: 10).isActive = true
view2.bottomAnchor.constraint(equalTo: view.bottomAnchor, constant: -20).isActive = true

DenisLitvin

NSLayoutConstraint(item: view1, attribute: .leading, relatedBy: .equal, toItem: view, attribute: .leading, multiplier: 1.0, constant: 20).isActive = true
NSLayoutConstraint(item: view1, attribute: .top, relatedBy: .equal, toItem: view, attribute: .top, multiplier: 1.0, constant: 40).isActive = true
NSLayoutConstraint(item: view1, attribute: .trailing, relatedBy: .equal, toItem: view, attribute: .trailing, multiplier: 1.0, constant: -20).isActive = true
NSLayoutConstraint(item: view1, attribute: .height, relatedBy: .equal, toItem: nil, attribute: .notAnAttribute, multiplier: 1.0, constant: 50).isActive = true

NSLayoutConstraint(item: view2, attribute: .leading, relatedBy: .equal, toItem: view, attribute: .leading, multiplier: 1.0, constant: 20).isActive = true
NSLayoutConstraint(item: view2, attribute: .trailing, relatedBy: .equal, toItem: view, attribute: .trailing, multiplier: 1.0, constant: -20).isActive = true
NSLayoutConstraint(item: view2, attribute: .top, relatedBy: .equal, toItem: view1, attribute: .b

DenisLitvin

let views = ["view1": view1,
             "view2": view2]
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-20-[view1]-20-|", options: [], metrics: nil, views: views))
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "H:|-20-[view2]-20-|", options: [], metrics: nil, views: views))
view.addConstraints(NSLayoutConstraint.constraints(withVisualFormat: "V:|-40-[view1]-10-[view2]-20-|", options: [], metrics: nil, views: views))

DenisLitvin

view.isHidden = true
NSLayoutConstraint.deactivate([constraint1, constraint2])

DenisLitvin

NSLayoutConstraint.deactivate([constraint1, constraint2])