/* |
Copyright (C) 2014 Apple Inc. All Rights Reserved. |
See LICENSE.txt for this sample’s licensing information |
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*/ |
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#import "SettingsViewController.h" |
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@import MapKit; |
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NSString * const TrackLocationInBackgroundPrefsKey = @"TrackLocationInBackgroundPrefsKey"; // BOOL |
NSString * const LocationTrackingAccuracyPrefsKey = @"LocationTrackingAccuracyPrefsKey"; // CLLocationAccuracy (double) |
NSString * const PlaySoundOnLocationUpdatePrefsKey = @"PlaySoundOnLocationUpdatePrefsKey"; // BOOL |
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// table cell identifiers |
NSString * const SwitchOptionCellID = @"SwitchOptionTableViewCell"; // generic switch cell |
NSString * const PickerOptionCellID = @"PickerOptionTableViewCell"; // generic picker cell |
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#pragma mark - |
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@interface AccuracyPickerOption : NSObject |
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@property (nonatomic, copy) NSString *headline; |
@property (nonatomic, copy) NSString *details; |
@property (nonatomic, copy) NSString *defaultsKey; |
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@end |
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@implementation AccuracyPickerOption |
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+ (instancetype)withHeadline:(NSString *)description details:(NSString *)details defaultsKey:(NSString *)defaultsKey |
{ |
NSParameterAssert(description != nil); |
NSParameterAssert(defaultsKey != nil); |
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AccuracyPickerOption *option = [AccuracyPickerOption new]; |
option.headline = description; |
option.details = details; |
option.defaultsKey = defaultsKey; |
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return option; |
} |
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@end |
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#pragma mark - |
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@interface SwitchOption : NSObject |
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@property (nonatomic, copy) NSString *headline; |
@property (nonatomic, copy) NSString *details; |
@property (nonatomic, copy) NSString *defaultsKey; |
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@end |
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@implementation SwitchOption |
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+ (instancetype)withHeadline:(NSString *)description details:(NSString *)details defaultsKey:(NSString *)defaultsKey |
{ |
NSParameterAssert(description != nil); |
NSParameterAssert(details != nil); |
NSParameterAssert(defaultsKey != nil); |
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SwitchOption *option = [SwitchOption new]; |
option.headline = description; |
option.details = details; |
option.defaultsKey = defaultsKey; |
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return option; |
} |
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@end |
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#pragma mark - |
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@interface SwitchOptionTableViewCell : UITableViewCell |
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@property (nonatomic, weak) IBOutlet UILabel *titleLabel; |
@property (nonatomic, weak) IBOutlet UILabel *detailsLabel; |
@property (nonatomic, weak) IBOutlet UISwitch *switchControl; |
@property (nonatomic, copy) NSString *defaultsKey; |
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@end |
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#pragma mark - |
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@implementation SwitchOptionTableViewCell |
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- (void)configureWithOptions:(SwitchOption *)options |
{ |
self.titleLabel.text = options.headline; |
self.defaultsKey = options.defaultsKey; |
self.detailsLabel.text = options.details; |
self.switchControl.on = (BOOL)[[NSUserDefaults standardUserDefaults] boolForKey:self.defaultsKey]; |
} |
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// called from "toggleSwitch" - user changes a setting that uses UISwitch to change its settings |
// |
- (IBAction)updatePreferencesFromView:(id)sender |
{ |
[[NSUserDefaults standardUserDefaults] setBool:self.switchControl.isOn forKey:self.defaultsKey]; |
} |
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- (IBAction)toggleSwitch:(id)sender |
{ |
// one of the UISwitch-based preference has changed |
UISwitch *aSwitch = self.switchControl; |
BOOL newState = aSwitch.isOn; |
[aSwitch setOn:newState animated:YES]; |
[self updatePreferencesFromView:aSwitch]; |
} |
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@end |
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#pragma mark - |
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@interface PickerOptionTableViewCell : UITableViewCell <UIPickerViewDataSource, UIPickerViewDelegate> |
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@property (nonatomic, weak) IBOutlet UILabel *titleLabel; |
@property (nonatomic, weak) IBOutlet UILabel *detailsLabel; |
@property (nonatomic, weak) IBOutlet UIPickerView *pickerView; |
@property (nonatomic, copy) NSString *defaultsKey; |
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@end |
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#pragma mark - |
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@implementation PickerOptionTableViewCell |
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- (void)configureWithOptions:(AccuracyPickerOption *)options |
{ |
self.titleLabel.text = options.headline; |
self.defaultsKey = options.defaultsKey; |
self.detailsLabel.text = options.details; |
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// set the picker to match the value of the default CLLocationAccuracy |
NSNumber *accuracyNum = (NSNumber *)[[NSUserDefaults standardUserDefaults] valueForKey:self.defaultsKey]; |
CLLocationAccuracy accuracy = [accuracyNum doubleValue]; |
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NSInteger row = 0; |
if (accuracy == kCLLocationAccuracyBestForNavigation) |
{ |
row = 0; |
} |
else if (accuracy == kCLLocationAccuracyBest) |
{ |
row = 1; |
} |
else if (accuracy == kCLLocationAccuracyNearestTenMeters) |
{ |
row = 2; |
} |
else if (accuracy == kCLLocationAccuracyHundredMeters) |
{ |
row = 3; |
} |
else if (accuracy == kCLLocationAccuracyKilometer) |
{ |
row = 4; |
} |
else if (accuracy == kCLLocationAccuracyThreeKilometers) |
{ |
row = 5; |
} |
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[self.pickerView selectRow:row inComponent:0 animated:NO]; |
} |
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// returns the number of 'columns' to display on the picker |
- (NSInteger)numberOfComponentsInPickerView:(UIPickerView *)pickerView |
{ |
return 1; |
} |
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// returns the number of rows in the first component of the picker |
- (NSInteger)pickerView:(UIPickerView *)pickerView numberOfRowsInComponent:(NSInteger)component |
{ |
return 6; |
} |
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- (CGFloat)pickerView:(UIPickerView *)pickerView rowHeightForComponent:(NSInteger)component |
{ |
return 18.0; |
} |
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// keys to describe the NSDictionary returned from accuracyTitleAndValueForRow |
#define kAccuracyTitleKey @"accuracyTitle" |
#define kAccuracyValueKey @"accuracyValue" |
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- (NSDictionary *)accuracyTitleAndValueForRow:(NSInteger)row |
{ |
NSString *title = @""; |
CLLocationAccuracy accuracyValue = -1; |
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switch (row) |
{ |
case 0: |
title = @"kCLLocationAccuracyBestForNavigation"; |
accuracyValue = kCLLocationAccuracyBestForNavigation; |
break; |
case 1: |
title = @"kCLLocationAccuracyBest"; |
accuracyValue = kCLLocationAccuracyBest; |
break; |
case 2: |
title = @"kCLLocationAccuracyNearestTenMeters"; |
accuracyValue = kCLLocationAccuracyNearestTenMeters; |
break; |
case 3: |
title = @"kCLLocationAccuracyHundredMeters"; |
accuracyValue = kCLLocationAccuracyHundredMeters; |
break; |
case 4: |
title = @"kCLLocationAccuracyKilometer"; |
accuracyValue = kCLLocationAccuracyKilometer; |
break; |
case 5: |
title = @"kCLLocationAccuracyThreeKilometers"; |
accuracyValue = kCLLocationAccuracyThreeKilometers; |
break; |
} |
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return @{kAccuracyTitleKey: title, kAccuracyValueKey: [NSNumber numberWithDouble:accuracyValue]}; |
} |
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- (UIView *)pickerView:(UIPickerView *)pickerView viewForRow:(NSInteger)row forComponent:(NSInteger)component reusingView:(UIView *)view |
{ |
UILabel *customView = (UILabel *)view; |
if (customView == nil) |
{ |
customView = [[UILabel alloc] initWithFrame:CGRectZero]; |
} |
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// find the accuracy title for the given row |
NSDictionary *resultDict = [self accuracyTitleAndValueForRow:row]; |
NSString *title = resultDict[kAccuracyTitleKey]; |
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NSMutableAttributedString *attrString = [[NSMutableAttributedString alloc] initWithString:title]; |
UIFont *font = [UIFont systemFontOfSize:12]; |
[attrString addAttribute:NSFontAttributeName value:font range:NSMakeRange(0, title.length)]; |
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customView.attributedText = attrString; |
customView.textAlignment = NSTextAlignmentCenter; |
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return customView; |
} |
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- (void)pickerView:(UIPickerView *)pickerView didSelectRow:(NSInteger)row inComponent:(NSInteger)component |
{ |
// find the accuracy value from the selected row |
NSDictionary *resultDict = [self accuracyTitleAndValueForRow:row]; |
CLLocationAccuracy accuracy = [resultDict[kAccuracyValueKey] doubleValue]; |
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// this will cause an NSNotification to occur (NSUserDefaultsDidChangeNotification) |
// ultimately calling BreadcrumbViewController - (void)settingsDidChange:(NSNotification *)notification |
// |
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults]; |
[defaults setInteger:accuracy forKey:LocationTrackingAccuracyPrefsKey]; |
} |
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@end |
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#pragma mark - |
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@interface SettingsViewController () |
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@property (nonatomic, copy) NSArray *settings; |
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@end |
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@implementation SettingsViewController |
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- (void)viewDidLoad |
{ |
[super viewDidLoad]; |
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self.settings = @[ |
[SwitchOption withHeadline:NSLocalizedString(@"Background Updates:", @"Label for switch that enables and disables background updates") |
details:NSLocalizedString(@"Turn on/off tracking current location while suspended.", @"Description for switch that enables and disables background updates") |
defaultsKey:TrackLocationInBackgroundPrefsKey], |
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[AccuracyPickerOption withHeadline:@"Accuracy:" |
details:NSLocalizedString(@"Set level of accuracy when tracking your location.", @"Description for accuracy") |
defaultsKey:LocationTrackingAccuracyPrefsKey], |
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[SwitchOption withHeadline:@"Audio Feedback:" |
details:@"Play a sound when a new location update is received." |
defaultsKey:PlaySoundOnLocationUpdatePrefsKey], |
]; |
} |
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- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath |
{ |
CGFloat cellHeight = 0.0; |
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id option = self.settings[indexPath.row]; |
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if ([option isKindOfClass:[AccuracyPickerOption class]]) |
{ |
cellHeight = 213.00; // cell height for the accuracy cell (with UIPickerView) |
} |
if ([option isKindOfClass:[SwitchOption class]]) |
{ |
cellHeight = 105.0; // cell height for the switch cell |
} |
return cellHeight; |
} |
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- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section |
{ |
return self.settings.count; |
} |
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- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath |
{ |
id option = self.settings[indexPath.row]; |
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UITableViewCell *cell = nil; |
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if ([option isKindOfClass:[AccuracyPickerOption class]]) |
{ |
PickerOptionTableViewCell *pickerCell = (PickerOptionTableViewCell *)[tableView dequeueReusableCellWithIdentifier:PickerOptionCellID]; |
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AccuracyPickerOption *pickerOption = option; |
[pickerCell configureWithOptions:pickerOption]; |
cell = pickerCell; |
} |
if ([option isKindOfClass:[SwitchOption class]]) |
{ |
SwitchOptionTableViewCell *switchCell = (SwitchOptionTableViewCell *)[tableView dequeueReusableCellWithIdentifier:SwitchOptionCellID]; |
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SwitchOption *switchOption = option; |
[switchCell configureWithOptions:switchOption]; |
cell = switchCell; |
} |
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return cell; |
} |
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@end |
