LoginRegisterViewController.m

//
//  LoginRegisterViewController.m
//  CookBook
//
//  Created by Jagdeep Matharu on 2017-01-23.
//  Copyright © 2017 Jagdeep Matharu. All rights reserved.
//

#import "LoginRegisterViewController.h"

@interface LoginRegisterViewController ()

@end

@implementation LoginRegisterViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    
    //set the background color of the view
    self.view.backgroundColor = [UIColor colorWithRed:61.0/255.0 green:91.0/255.0 blue:151.0/255.0 alpha:1];
    
    //center Container
    [self createInputContainerView];
    
    //Register Button
    [self createLoginRegisterButton];
    
//    [self createNameTextField];

}

- (UIView *) createInputContainerView {
    UIView *centerContainer = [[UIView alloc] init];
    centerContainer.backgroundColor = [UIColor whiteColor];
    [centerContainer setTranslatesAutoresizingMaskIntoConstraints:false];
    centerContainer.layer.cornerRadius = 5;
    centerContainer.layer.masksToBounds = true;
    [self.view addSubview:centerContainer];
    
    [centerContainer.centerXAnchor constraintEqualToAnchor:self.view.centerXAnchor].active = true;
    [centerContainer.centerYAnchor constraintEqualToAnchor:self.view.centerYAnchor].active = true;
    [centerContainer.widthAnchor constraintEqualToAnchor:self.view.widthAnchor constant:-24].active = true;
    [centerContainer.heightAnchor constraintEqualToConstant:150].active = true;
    
    [centerContainer addSubview:[self createNameTextField]];
    [[self createNameTextField].leftAnchor constraintEqualToAnchor:centerContainer.leftAnchor constant:12].active = true;
    [[self createNameTextField].topAnchor constraintEqualToAnchor:centerContainer.topAnchor].active = true;
    [[self createNameTextField].widthAnchor constraintEqualToAnchor:centerContainer.widthAnchor].active = true;
    [[self createNameTextField].heightAnchor constraintEqualToAnchor:centerContainer.heightAnchor multiplier:1/3].active = true;
    
    return centerContainer;
}

- (UIButton *) createLoginRegisterButton {
    UIButton *button = [[UIButton alloc] init];
    button.backgroundColor = [UIColor colorWithRed:91.0/255.0 green:115.0/255.0 blue:169.0/255.0 alpha:1];
    [button setTitleColor:[UIColor whiteColor] forState:normal];
    [button setTitle:@"Register" forState:normal];
    [button setTranslatesAutoresizingMaskIntoConstraints:false];
    [self.view addSubview:button];
    
    [button.centerXAnchor constraintEqualToAnchor:self.view.centerXAnchor].active = true;
    [button.topAnchor constraintEqualToAnchor:[self createInputContainerView].bottomAnchor constant:12].active = true;
    [button.widthAnchor constraintEqualToAnchor:[self createInputContainerView].widthAnchor].active = true;
    [button.heightAnchor constraintEqualToConstant:50].active = true;
    
    return button;
}

- (UITextField *) createNameTextField {
    UITextField *tfName = [[UITextField alloc] init];
    tfName.placeholder = @"Name";
    tfName.translatesAutoresizingMaskIntoConstraints = false;  
    return tfName;
}

@end