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//
//  ViewController.m
//  testLayout
//
//  Created by Ben Liu on 19/11/2015.
//  Copyright (c) 2015 Ben Liu. All rights reserved.
//

#import "ViewController.h"

@interface ViewController ()

@end


@implementation ViewController


- (void)viewDidLoad {
    [super viewDidLoad];
    

    // self.view is the super view
    UIView *superview = self.view;
    UIView *view1 = [[UIView alloc] init];
    view1.translatesAutoresizingMaskIntoConstraints = NO;
    view1.backgroundColor = [UIColor colorWithRed:0.95 green:0.47 blue:0.48 alpha:1.0];
    [superview addSubview:view1];
    
    UIEdgeInsets padding = UIEdgeInsetsMake(40, 10, 10, 10);
    
    [superview addConstraints:@[
                                
                                //view1 constraints
                                // I found out by using UI native Auto Layout you must have the 4 contraints at
                                // At the same time
                                [NSLayoutConstraint constraintWithItem:view1
                                                             attribute:NSLayoutAttributeTop
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeTop
                                                            multiplier:1.0
                                                              constant:padding.top],
                                
                                [NSLayoutConstraint constraintWithItem:view1
                                                             attribute:NSLayoutAttributeLeading
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeLeft
                                                            multiplier:1.0
                                                              constant:padding.left],
    
                                
                                [NSLayoutConstraint constraintWithItem:view1
                                                             attribute:NSLayoutAttributeBottom
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeBottom
                                                            multiplier:0.5  // half of the height of superview
                                                              constant:-padding.bottom],
     
                                
                                 
                                [NSLayoutConstraint constraintWithItem:view1
                                                             attribute:NSLayoutAttributeTrailing
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeRight
                                                            multiplier:1
                                                              constant:-padding.right],
                                
                                ]];
    
                                 
    
    //  0x03. Add another view
    
    UIView *view2 = [[UIView alloc] init];
    view2.translatesAutoresizingMaskIntoConstraints = NO;
    view2.backgroundColor = [UIColor colorWithRed:1.00 green:0.83 blue:0.58 alpha:1.0];
    [superview addSubview:view2];
    UIEdgeInsets padding2 = UIEdgeInsetsMake(10, 10, 10, 10);
    
    [superview addConstraints:@[
                                
                                //view1 constraints
                                [NSLayoutConstraint constraintWithItem:view2
                                                             attribute:NSLayoutAttributeTop
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:view1
                                                             attribute:NSLayoutAttributeBottom
                                                            multiplier:1.0
                                                              constant:padding2.top],
                                
                                [NSLayoutConstraint constraintWithItem:view2
                                                             attribute:NSLayoutAttributeLeft
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeLeft
                                                            multiplier:1.0
                                                              constant:padding2.left],
                                
                                [NSLayoutConstraint constraintWithItem:view2
                                                             attribute:NSLayoutAttributeBottom
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeBottom
                                                            multiplier:1.0
                                                              constant:-padding2.bottom],
                                
                                [NSLayoutConstraint constraintWithItem:view2
                                                             attribute:NSLayoutAttributeRight
                                                             relatedBy:NSLayoutRelationEqual
                                                                toItem:superview
                                                             attribute:NSLayoutAttributeRight
                                                            multiplier:1
                                                              constant:-padding2.right],
                                
                                ]];
    
    
}

- (void)didReceiveMemoryWarning {
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

@end