/*

 Copyright (C) 2017 Apple Inc. All Rights Reserved.

 See LICENSE.txt for this sample’s licensing information

 Abstract:

 The view controller displays what each icon does on iOS.

 */

#import "RootViewController.h"

#define kTopBottomMargins 20

NSString * const kIconName = @"IconName";

NSString * const kIconDescription = @"IconDescription";

NSString * const kIconCellHeight = @"kIconCellHeight";

@interface RootViewController ()

//! Icon information.

@property (nonatomic, strong) NSArray *icons;

@end

@implementation RootViewController

//| ----------------------------------------------------------------------------

- (void)viewDidLoad

{

    [super viewDidLoad];

    self.icons = @[

       @{kIconName: @"Icon-60@3x",

         kIconDescription: @"Home screen on iPhone with retina HD display",

         kIconCellHeight: @(60)},

       @{kIconName: @"Icon-60@2x",

         kIconDescription: @"Home screen on iPhone/iPod Touch with retina display (iOS 7+)",

         kIconCellHeight: @(60)},

       @{kIconName: @"Icon-76",

         kIconDescription: @"Home screen on iPad (iOS 7+)",

         kIconCellHeight: @(76)},

       @{kIconName: @"Icon-76@2x",

         kIconDescription: @"Home screen on iPad with retina display (iOS 7+)",

         kIconCellHeight: @(76)},

       @{kIconName: @"Icon-83.5@2x",

         kIconDescription: @"Home screen on iPad Pro",

         kIconCellHeight: @(83.5)},

       @{kIconName: @"Icon-Small-40",

         kIconDescription: @"Spotlight (iOS 7+)",

         kIconCellHeight: @(40)},

       @{kIconName: @"Icon-Small-40@2x",

         kIconDescription: @"Spotlight on devices with retina display (iOS 7+)",

         kIconCellHeight: @(40)},

       @{kIconName: @"Icon-Small-40@3x",

         kIconDescription: @"Spotlight on devices with retina HD display",

         kIconCellHeight: @(40)},

       @{kIconName: @"Icon-Small",

         kIconDescription: @"Spotlight on iPhone/iPod Touch (iOS 6.1 and earlier), and Settings on all devices",

         kIconCellHeight: @(40)},

       @{kIconName: @"Icon-Small@2x",

         kIconDescription: @"Spotlight on iPhone/iPod Touch with retina display (iOS 6.1 and earlier), and Settings on all devices with retina display",

         kIconCellHeight: @(40)},

       @{kIconName: @"Icon-Small@3x",

         kIconDescription: @"Settings on devices with retina HD display",

         kIconCellHeight: @(40)},

       @{kIconName: @"Icon",

         kIconDescription: @"Home screen on iPhone/iPod touch (iOS 6.1 and earlier)",

         kIconCellHeight: @(57)},

       @{kIconName: @"Icon@2x",

         kIconDescription: @"Home screen on iPhone/iPod Touch with retina display (iOS 6.1 and earlier)",

         kIconCellHeight: @(57)},

       @{kIconName: @"Icon-72",

         kIconDescription: @"Home screen on iPad (iOS 6.1 and earlier)",

         kIconCellHeight: @(72)},

       @{kIconName: @"Icon-72@2x",

         kIconDescription: @"Home screen on iPad with retina display (iOS 6.1 and earlier)",

         kIconCellHeight: @(72)},

       @{kIconName: @"Icon-Small-50",

         kIconDescription: @"Spotlight on iPad (iOS 6.1 and earlier)",

         kIconCellHeight: @(50)},

       @{kIconName: @"Icon-Small-50@2x",

         kIconDescription: @"Spotlight on iPad with retina display (iOS 6.1 and earlier)",

         kIconCellHeight: @(50)},

    ];

}

#pragma mark -

#pragma mark UITableViewDelegate

//| ----------------------------------------------------------------------------

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

{

    return [self.icons[indexPath.row][kIconCellHeight] floatValue] + kTopBottomMargins;

}

#pragma mark -

#pragma mark UITableViewDataSource

//| ----------------------------------------------------------------------------

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section

{

    return self.icons.count;

}

//| ----------------------------------------------------------------------------

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath

{

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cellID" forIndexPath:indexPath];

    cell.detailTextLabel.numberOfLines = 0;

    cell.detailTextLabel.lineBreakMode = NSLineBreakByWordWrapping;

    NSString *iconName = self.icons[indexPath.row][kIconName];

    NSString *iconPath = [[NSBundle mainBundle] pathForResource:iconName ofType:@"png"];

    BOOL isRetina = [iconName rangeOfString:@"@2x"].location != NSNotFound;

    BOOL isRetinaHD = [iconName rangeOfString:@"@3x"].location != NSNotFound;

    cell.imageView.image = [[UIImage alloc] initWithData:[NSData dataWithContentsOfFile:iconPath] scale:(isRetinaHD ? 3 : (isRetina ? 2 : 1))];

    cell.textLabel.text = [iconName stringByAppendingString:@".png"];

    cell.detailTextLabel.text = self.icons[indexPath.row][kIconDescription];

    return cell;

}

@end