CyteKit/TabBarController.mm

   1 /* Cydia - iPhone UIKit Front-End for Debian APT
   2  * Copyright (C) 2008-2014  Jay Freeman (saurik)
   3 */
   4
   5 /* GNU General Public License, Version 3 {{{ */
   6 /*
   7  * Cydia is free software: you can redistribute it and/or modify
   8  * it under the terms of the GNU General Public License as published
   9  * by the Free Software Foundation, either version 3 of the License,
  10  * or (at your option) any later version.
  11  *
  12  * Cydia is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15  * GNU General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with Cydia.  If not, see <http://www.gnu.org/licenses/>.
  19 **/
  20 /* }}} */
  21
  22 #include "CyteKit/TabBarController.h"
  23
  24 #include "iPhonePrivate.h"
  25
  26 @implementation UITabBarController (Cydia)
  27
  28 @end
  29
  30 @implementation CyteTabBarController
  31
  32 - (void) didReceiveMemoryWarning {
  33     [super didReceiveMemoryWarning];
  34
  35     // presenting a UINavigationController on 2.x does not update its transitionView
  36     // it thereby will not allow its topViewController to be unloaded by memory pressure
  37     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  38         UIViewController *selected([self selectedViewController]);
  39         for (UINavigationController *controller in [self viewControllers])
  40             if (controller != selected)
  41                 if (UIViewController *top = [controller topViewController])
  42                     [top unloadView];
  43     }
  44 }
  45
  46 - (void) tabBarController:(UITabBarController *)tabBarController didSelectViewController:(UIViewController *)viewController {
  47     if ([self unselectedViewController])
  48         [self setUnselectedViewController:nil];
  49
  50     // presenting a UINavigationController on 2.x does not update its transitionView
  51     // if this view was unloaded, the tranitionView may currently be presenting nothing
  52     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  53         UINavigationController *navigation((UINavigationController *) viewController);
  54         [navigation pushViewController:[[[UIViewController alloc] init] autorelease] animated:NO];
  55         [navigation popViewControllerAnimated:NO];
  56     }
  57 }
  58
  59 - (void) dismissModalViewControllerAnimated:(BOOL)animated {
  60     if ([self modalViewController] == nil && [self unselectedViewController] != nil)
  61         [self setUnselectedViewController:nil];
  62     else
  63         [super dismissModalViewControllerAnimated:YES];
  64 }
  65
  66 - (void) setUnselectedViewController:(UIViewController *)transient {
  67     if (kCFCoreFoundationVersionNumber < kCFCoreFoundationVersionNumber_iPhoneOS_3_0) {
  68         if (transient != nil) {
  69             [[[self viewControllers] objectAtIndex:0] pushViewController:transient animated:YES];
  70             [self setSelectedIndex:0];
  71         } return;
  72     }
  73
  74     NSMutableArray *controllers = [[[self viewControllers] mutableCopy] autorelease];
  75     if (transient != nil) {
  76         UINavigationController *navigation([[[UINavigationController alloc] init] autorelease]);
  77         [navigation setViewControllers:[NSArray arrayWithObject:transient]];
  78         transient = navigation;
  79
  80         if (transient_ == nil)
  81             remembered_ = [controllers objectAtIndex:0];
  82         transient_ = transient;
  83         [transient_ setTabBarItem:[remembered_ tabBarItem]];
  84         [controllers replaceObjectAtIndex:0 withObject:transient_];
  85         [self setSelectedIndex:0];
  86         [self setViewControllers:controllers];
  87         [self concealTabBarSelection];
  88     } else if (remembered_ != nil) {
  89         [remembered_ setTabBarItem:[transient_ tabBarItem]];
  90         transient_ = transient;
  91         [controllers replaceObjectAtIndex:0 withObject:remembered_];
  92         remembered_ = nil;
  93         [self setViewControllers:controllers];
  94         [self revealTabBarSelection];
  95     }
  96 }
  97
  98 - (UIViewController *) unselectedViewController {
  99     return transient_;
 100 }
 101
 102 - (void) unloadData {
 103     [super unloadData];
 104
 105     for (UINavigationController *controller in [self viewControllers])
 106         [controller unloadData];
 107
 108     if (UIViewController *selected = [self selectedViewController])
 109         [selected reloadData];
 110
 111     if (UIViewController *unselected = [self unselectedViewController]) {
 112         [unselected unloadData];
 113         [unselected reloadData];
 114     }
 115 }
 116
 117 @end