//

// ALiOSDemoListController.m

// PureLayout Example-iOS

//

// Copyright (c) 2014-2015 Tyler Fox

// https://github.com/PureLayout/PureLayout

//

#import "ALiOSDemoListController.h"

NSString *const kLastUsedDemoTypeUserDefaultsKey = @"PureLayout-iOS-Demos-LastUsedDemoType";

@interface ALiOSDemoListController ()

@property (nonatomic, readonly) NSArray *demoTitles;

// Whether to load the Swift (YES) or Objective-C (NO) versions of the demos.

@property (nonatomic, assign) BOOL useSwiftDemos;

@end

@implementation ALiOSDemoListController

@synthesize useSwiftDemos = _useSwiftDemos;

// Recalls and returns the last value of the `useSwiftDemos` flag.

+ (BOOL)recallPreviousUseSwiftDemosValue

{

#if !USING_XCODE7_SCHEME

return NO;

#endif

id storedDemoType = [[NSUserDefaults standardUserDefaults] objectForKey:kLastUsedDemoTypeUserDefaultsKey];

if (storedDemoType) {

NSAssert([storedDemoType isKindOfClass:[NSNumber class]], @"The stored demo type object should be of type NSNumber!");

return [storedDemoType boolValue];

}

// Use the Swift demos by default, if there is no persisted value.

return YES;

}

- (BOOL)useSwiftDemos

{

#if !USING_XCODE7_SCHEME

return NO;

#endif

return _useSwiftDemos;

}

- (void)viewDidLoad

{

[super viewDidLoad];

self.title = @"PureLayout iOS Demos";

self.useSwiftDemos = [[self class] recallPreviousUseSwiftDemosValue];

}

- (void)setUseSwiftDemos:(BOOL)useSwiftDemos

{

_useSwiftDemos = useSwiftDemos;

// When changing between the Swift and Objective-C demos, persist the last used language type so that the demo app always opens back up to it.

[[NSUserDefaults standardUserDefaults] setObject:@(self.useSwiftDemos) forKey:kLastUsedDemoTypeUserDefaultsKey];

[[NSUserDefaults standardUserDefaults] synchronize];

}

- (NSArray *)demoTitles

{

return @[

@"Basic Auto Layout", // Demo 1

@"Working with Arrays of Views", // Demo 2

@"Distributing Views", // Demo 3

@"Leading & Trailing Attributes", // Demo 4

@"Cross-Attribute Constraints", // Demo 5

@"Priorities & Inequalities", // Demo 6

@"Animating Constraints", // Demo 7

@"Constraint Identifiers (iOS 7.0+)", // Demo 8

@"Layout Margins (iOS 8.0+)", // Demo 9

@"Constraints Without Installing", // Demo 10

@"Basic UIScrollView" // Demo 11

];

}

- (NSString *)textForDemoAtIndex:(NSUInteger)index

{

NSString *text = self.demoTitles[index];

text = [NSString stringWithFormat:@"%@. %@", @(index + 1), text];

return text;

}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView

{

return 2;

}

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

{

if (section == 0) {

return 1;

} else {

return self.demoTitles.count;

}

}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section

{

if (section == 0) {

return nil;

} else {

NSString *language = self.useSwiftDemos ? @"Swift" : @"Objective-C";

return [NSString stringWithFormat:@"%@ Demos", language];

}

}

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

{

UITableViewCell *cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleValue1 reuseIdentifier:nil]; // not bothering to reuse cells here

NSString *text;

if (indexPath.section == 0) {

// The very first section is the option to switch between Objective-C and Swift demo files.

#if USING_XCODE7_SCHEME

cell.textLabel.textColor = [UIColor blueColor];

cell.textLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleHeadline];

NSString *language = self.useSwiftDemos ? @"Objective-C" : @"Swift";

text = [NSString stringWithFormat:@"Switch to %@ demo files", language];

#else

cell.textLabel.font = [UIFont preferredFontForTextStyle:UIFontTextStyleFootnote];

text = @"Use Example-iOS-Xcode7 scheme to run Swift demos.";

#endif

} else {

// All other rows take you to the actual demos.

cell.accessoryType = UITableViewCellAccessoryDisclosureIndicator;

text = [self textForDemoAtIndex:indexPath.row];

}

cell.textLabel.text = text;

return cell;

}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath

{

if (indexPath.section == 0) {

// The very first section is the option to switch between Objective-C and Swift demo files.

#if USING_XCODE7_SCHEME

self.useSwiftDemos = !self.useSwiftDemos;

[tableView reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationFade];

[tableView reloadSections:[NSIndexSet indexSetWithIndex:1] withRowAnimation:UITableViewRowAnimationRight];

#else

[tableView deselectRowAtIndexPath:indexPath animated:YES];

#endif

} else {

// All other rows take you to the actual demos.

[self displayDemoAtIndex:indexPath.row];

}

}

- (void)displayDemoAtIndex:(NSUInteger)index

{

NSString *viewControllerClassName;

if (self.useSwiftDemos) {

viewControllerClassName = [NSString stringWithFormat:@"iOSDemo%@ViewController", @(index + 1)];

} else {

viewControllerClassName = [NSString stringWithFormat:@"ALiOSDemo%@ViewController", @(index + 1)];

}

Class viewControllerKlass = NSClassFromString(viewControllerClassName);

NSAssert(viewControllerKlass, @"Class should not be nil!");

NSAssert([viewControllerKlass isSubclassOfClass:[UIViewController class]], @"Class should be a view controller!");

UIViewController *demoViewController = [[viewControllerKlass alloc] initWithNibName:nil bundle:nil];

if (demoViewController) {

demoViewController.title = [self textForDemoAtIndex:index];

[self.navigationController pushViewController:demoViewController animated:YES];

}

}

@end