在我的一个与- (BOOL)prefersStatusBarHidden {
return NO;
}
- (void)viewDidLoad
{
[super viewDidLoad];
self.userDefaults = [NSUserDefaults standardUserDefaults];
self.hairlineHeightConstraint.constant = 0.5f;
self.hairlineDivider.backgroundColor = [UIColor colorWithWhite:0.9f alpha:1.0f];
self.title = @"Course";
[self.classroomButton setTintColor:[UIColor pxColorWithHexValue:self.passedCourse.courseColor]];
[self.classroomButton addTarget:self action:@selector(subscribeToCourse:) forControlEvents:UIControlEventTouchUpInside];
[self getAnySubscribedCourse];
if (self.subscribedCourse) {
if (self.passedCourse == self.subscribedCourse) {
[self.classroomButton setTitle:@"Remove from Classroom" forState:UIControlStateNormal];
self.subscribedToThisCourse = YES;
} else {
self.alreadySubscribed = YES;
}
}
[self configureHeaderView];
NSError *error;
if (![[self fetchedResultsController] performFetch:&error]) {
NSLog(@"Unresolved error %@, %@", error, [error userInfo]);
}
}
- (void)viewDidLayoutSubviews
{
[super viewDidLayoutSubviews];
if (self.shareView) {
CGRect frame = self.shareView.frame;
CGFloat navbarHeight = self.navigationController.navigationBar.frame.size.height;
CGFloat statusBarHeight = [[UIApplication sharedApplication] statusBarFrame].size.height;
frame = CGRectMake(0.0f, self.tableView.contentOffset.y + statusBarHeight + navbarHeight, frame.size.width, frame.size.height);
self.shareView.frame = frame;
[self.view bringSubviewToFront:self.shareView];
}
NSString *backText = self.navigationItem.backBarButtonItem.title;
UIBarButtonItem *backButton = [[UIBarButtonItem alloc] initWithTitle:backText style:UIBarButtonItemStylePlain target:nil action:nil];
[backButton setTitleTextAttributes:[[MSThemeManager currentTheme] barButtonTextDictionaryForState:UIControlStateNormal withTintColor:[UIColor pxColorWithHexValue:self.passedCourse.courseColor]] forState:UIControlStateNormal];
self.navigationItem.backBarButtonItem = backButton;
}
- (void)viewWillAppear:(BOOL)animated
{
[super viewWillAppear:animated];
self.navigationController.navigationBarHidden = NO;
[self.tableView deselectRowAtIndexPath:[self.tableView indexPathForSelectedRow] animated:animated];
[self.tableView reloadData];
}
- (void)viewWillDisappear:(BOOL)animated
{
[super viewWillDisappear:animated];
if ([self.tableView.tableHeaderView isKindOfClass:[ParallaxCourseDetailHeaderView class]]) {
ParallaxCourseDetailHeaderView *headerView = (ParallaxCourseDetailHeaderView *)self.tableView.tableHeaderView;
[headerView.courseInfoAudioPlayer stop];
self.tableView.tableHeaderView = nil;
}
[[NSNotificationCenter defaultCenter] removeObserver:self];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
}
#pragma mark - HeaderView
- (void)configureHeaderView
{
CGRect screenBound = [[UIScreen mainScreen] bounds];
CGSize screenSize = screenBound.size;
CGFloat screenWidth = screenSize.width;
NSDictionary *attributesDictionary = @{NSFontAttributeName : self.headerLabel.font};
CGFloat width = screenWidth - self.headerLabel.frame.origin.x - 15.0f;
CGSize boundingBox = CGSizeMake(width, CGFLOAT_MAX);
NSString *descriptionToBound = self.passedCourse.courseDescription;
CGRect labelRect = [descriptionToBound boundingRectWithSize:boundingBox
options:NSStringDrawingUsesLineFragmentOrigin
attributes:attributesDictionary
context:nil];
CGRect headerLabelRect = self.headerLabel.frame;
CGRect tableHeaderViewRect = self.tableView.tableHeaderView.frame;
CGRect dividerRect = self.hairlineDivider.frame;
CGFloat heightDifference = ceilf(labelRect.size.height - headerLabelRect.size.height);
tableHeaderViewRect.size.height += heightDifference;
self.tableView.tableHeaderView.frame = tableHeaderViewRect;
dividerRect.origin.y += heightDifference;
headerLabelRect.size.width = ceil(labelRect.size.width);
headerLabelRect.size.height = ceil(labelRect.size.height);
headerLabelRect.origin.y = (dividerRect.origin.y - headerLabelRect.size.height) / 2;
self.headerLabel.frame = headerLabelRect;
CGFloat parallaxViewHeight = 280.0f;
CGFloat headerHeight = parallaxViewHeight + heightDifference;
ParallaxCourseDetailHeaderView *headerView = [[ParallaxCourseDetailHeaderView alloc] initWithTitleViewStyle:SWParallaxTitleViewStyleWhiteWithMask withHeight:tableHeaderViewRect.size.height headerHeight:headerHeight];
UIImage *image = [UIImage imageNaobj:self.passedCourse.headerImage];
headerView.courseImage = [image imageWithRenderingMode:UIImageRenderingModeAlwaysTemplate];
[headerView setTintColor:[UIColor whiteColor]];
headerView.isTitleViewOpaque = YES;
headerView.fadeInDuration = 0.0;
headerView.trackID = self.passedCourse.aboutTrackID;
[headerView courseAudioIntroControl];
UIImage *headerTeacherImage = [UIImage imageNaobj:[NSString stringWithFormat:@"%@", self.passedCourse.teacher.teacherImageID]];
self.headerTeacherImage.image = headerTeacherImage;
self.headerTeacherImage.layer.cornerRadius = self.headerTeacherImage.frame.size.height / 2;
self.headerTeacherImage.clipsToBounds = YES;
self.headerLabel.text = self.passedCourse.courseDescription;
[self.headerTeacherButton setImage:headerTeacherImage forState:UIControlStateNormal];
UIView *oldHeaderView = self.tableView.tableHeaderView;
oldHeaderView.frame = CGRectMake(0, 0, screenWidth, oldHeaderView.frame.size.height);
self.tableView.tableHeaderView = nil;
[headerView.titleView addSubview:oldHeaderView];
self.tableView.tableHeaderView = headerView;
[headerView.imageContainerView setBackgroundColor:[UIColor pxColorWithHexValue:self.passedCourse.courseColor]];
headerView.title = self.passedCourse.title;
headerView.subtitle = [NSString stringWithFormat:@"%lu Sessions", (unsigned long)self.passedCourse.courseObjects.count];
headerView.teacher = [NSString stringWithFormat:@"With %@", self.passedCourse.teacher.teacherName];
[headerView.titleLabel adjustCurrentFontSize];
[headerView.subtitleLabel adjustCurrentFontSize];
[headerView.teacherLabel adjustCurrentFontSize];
}
#pragma mark - ScrollView
- (void)scrollViewDidScroll:(UIScrollView *)scrollView
{
if ([self.tableView.tableHeaderView isKindOfClass:[ParallaxCourseDetailHeaderView class]]) {
ParallaxCourseDetailHeaderView *headerView = (ParallaxCourseDetailHeaderView *)self.tableView.tableHeaderView;
headerView.parallaxOffset = scrollView.contentOffset.y + scrollView.contentInset.top;
}
}
相关的视图中，我很难跟踪崩溃。有时它会立即崩溃，有时需要一些负载（返回到导航堆栈中的上一个视图，再次加载视图）。我已经通过仪器运行应用程序，虽然内存使用不断上升，但我没有看到任何泄漏。我可能会用完内存吗？我也没有看到任何内存警告。这是错误：
*** - [UIActivityIndicatorView release]：发送到解除分配的实例0x15f6d6aa0的消息
我没有建立任何联系，我可以看到ActivityIndicator显示，然后当应用程序消失时应用程序崩溃（或者在应用程序崩溃之前它消失）。
我已经读过AFNetworking会导致这个问题，但我没有使用它。我只是使用NSURLSession。
这两个类非常相似，我已经包含了一个的加载调用，因为这个类太大而无法在这里发布。
它显示在嵌套在TabBarController中的导航控制器中：
(except the constructors)