我想我得到了一个保留周期。它发生在我推动和解雇 VC 时。每次我推动和关闭时，类似的物体就会堆积起来。
有人可以帮我理解这个分析器的输出。（上图）
问题 1 + 1.5：似乎一个事件触发了一个永远不会被释放的 GCD 调度块。诚然，我并不完全理解正在发生的一切。这个对象（1.31mb 突出显示的对象）是什么以及其生命周期中的一系列事件？知道为什么它没有被释放吗？
问题 2：您在下面的代码中看到保留周期的任何机会吗？
iOS：6
代码：4.6
测试：iphone 4 设备
DetailViewController.h
@interface SRDetailViewController : UIViewController
@property (weak, nonatomic) IBOutlet UILabel *roomTitle;
@property (weak, nonatomic) IBOutlet UIView *userScreenContainer;
@property (weak, nonatomic) IBOutlet UIView *opponentScreenContainer;
@property (weak, nonatomic) IBOutlet UILabel *statusLabel;
@property (weak, nonatomic) IBOutlet UIButton *retryButton;
@property (weak, nonatomic) IBOutlet UIProgressView *progressBar;
@property (strong, nonatomic) NSTimer *progressTimer;
@property (strong, nonatomic) NSTimer *retryTimer;
@property (weak, nonatomic) IBOutlet UIView *bottomViewContainer;
@property (strong, nonatomic) SRRoom *room;
@property (strong, nonatomic) SROpenTokVideoHandler *openTokHandler;
细节视图控制器.m
@interface SRDetailViewController ()
@property (strong, nonatomic) NSString* kApiKey;
@property (strong, nonatomic) NSString* kSessionId;
@property (strong, nonatomic) NSString* kToken;
@end
@implementation SRDetailViewController
- (void)viewDidLoad
{
[super viewDidLoad];
[self configOpentTok];
[self performGetRoomRequest];
[self configNavBar];
[self configNotifcations];
[self configProgressBar];
}
-(void)configSocialSharing
{
//check if it already exists
for(UIView *subview in self.view.subviews){
if([subview isKindOfClass:[SRSocialSharing class]]){
return;
}
}
//add off screen
CGRect frame = CGRectMake(0, [[UIScreen mainScreen] bounds].size.height, [[UIScreen mainScreen] bounds].size.width, 44);
SRSocialSharing *share = [[SRSocialSharing alloc] initWithFrame:frame];
[self.view addSubview:share];
share.sharingURL = [self createUrlForSharing];
//animate in
frame = CGRectMake(0, [[UIScreen mainScreen] bounds].size.height-100, [[UIScreen mainScreen] bounds].size.width, 44);
[UIView animateWithDuration:3 delay:2 options:UIViewAnimationOptionCurveEaseOut animations:^{
share.frame = frame;
} completion:nil];
}
-(NSURL *)createUrlForSharing
{
NSRange range = NSMakeRange(self.room.sessionId.length-7, 6);
NSString *shortSessionId = [self.room.sessionId substringWithRange:range];
NSString *urlString = [NSString stringWithFormat:@"url/invites/%@/%@?sessionId=%@",self.room.topicId, [self opposingPosition:self.room.position],shortSessionId];
return [NSURL URLWithString:urlString];
}
-(NSString *)opposingPosition:(NSString*)position
{
return ([position isEqualToString:@"agree"])? @"disagree" : @"agree";
}
-(void) configOpentTok{
[self.openTokHandler registerUserVideoStreamContainer:self.userScreenContainer];
self.openTokHandler.userVideoStreamConatinerName = self.room.position;
[self.openTokHandler registerOpponentOneVideoStreamContainer:self.opponentScreenContainer];
self.openTokHandler.opponentOneVideoStreamConatinerName = [self opposingPosition:self.room.position];
self.openTokHandler.shouldPublish = YES;
self.openTokHandler.isObserving = NO;
}
-(void)configNavBar
{
UIImage *backButtonImage = [UIImage imageWithContentsOfFile:@"backButton"];
UIButton *backButton = [UIButton buttonWithType:UIButtonTypeCustom];
[backButton setFrame:CGRectMake(0, 0, 47, 32)];
[backButton setImage:backButtonImage forState:UIControlStateNormal];
[backButton addTarget:self action:@selector(pressBackButton) forControlEvents:UIControlEventTouchUpInside];
UIBarButtonItem *navBackButton = [[UIBarButtonItem alloc] initWithCustomView:backButton];
[self.navigationItem setLeftBarButtonItem:navBackButton];
self.title = [self.room.position stringByReplacingCharactersInRange:NSMakeRange(0,1)
withString:[[self.room.position substringToIndex:1] capitalizedString]];
}
-(void)pressBackButton{
self.navigationItem.leftBarButtonItem.enabled = NO;
[self manageSafeClose];
double delayInSeconds = 3;
//[self updateStatusLabel:@"Disconnecting" withColor:[UIColor grayColor]];
dispatch_time_t popTime = dispatch_time(DISPATCH_TIME_NOW, (int64_t)(delayInSeconds * NSEC_PER_SEC));
dispatch_after(popTime, dispatch_get_main_queue(), ^(void){
[self.navigationController popViewControllerAnimated:YES];
});
}
-(void)configNotifcations
{
[[NSNotificationCenter defaultCenter] addObserver:self
selector:@selector(recieveNotifications:)
name:kSROpenTokVideoHandlerNotifcations
object:nil
];
}
-(void)recieveNotifications:(NSNotification *)notification
{
if ([[notification name] isEqualToString:kSROpenTokVideoHandlerNotifcations]){
NSDictionary *userInfo = notification.userInfo;
NSNumber *message = [userInfo objectForKey:@"message"];
[self statusMessage: message];
}
}
-(void)statusMessage:(NSNumber*)message{
NSString *result = nil;
switch([message intValue]) {
case 0:
result = @"Disconnected";
break;
case 1:
result = @"Connecting...";
[self startRetryTimer];
break;
case 2:
result = @"Publishing Your Video...";
break;
case 3:
result = @"Searching for Idiots...";
break;
case 4:
result = @"Start!";
[self startProgressBar];
[self stopTimer:self.retryTimer];
break;
case 5:
[self stopTimer:self.progressTimer];
result = @"Stopped!";
break;
case 6:
[self stopTimer:self.progressTimer];
result = @"Disconnecting...";
break;
case 7:
result = @"Opponent failed to join. Retrying...";
[self performSelector:@selector(retry) withObject:nil afterDelay:4];
break;
default:
result = @"Retry";
}
[self updateStatusLabel:result withColor:[self statusLabelColorPicker:message] animated:YES];
NSLog(@"STATUS LABEL UPDATE: %@", message);
}
-(UIColor*)statusLabelColorPicker:(NSString *)Message{
return [UIColor whiteColor];
}
-(void)performGetRoomRequest{
__weak typeof(self) weakSelf = self;
[[RKObjectManager sharedManager] getObject:weakSelf.room
path:nil
parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult){
weakSelf.openTokHandler.kToken = weakSelf.room.token;
weakSelf.openTokHandler.kSessionId = weakSelf.room.sessionId;
weakSelf.roomTitle.text = weakSelf.room.title;
weakSelf.navigationController.title = weakSelf.room.position;
[weakSelf configSocialSharing];
[weakSelf.openTokHandler doConnectToRoomWithSession];
}failure:^(RKObjectRequestOperation *operation, NSError *error){
}];
}
-(void)dealloc
{
self.room = nil;
}
-(void)manageSafeClose{
[self stopTimer:self.retryTimer];
[self stopTimer:self.progressTimer];
[self.openTokHandler safetlyCloseSession];
[[RKObjectManager sharedManager].operationQueue cancelAllOperations];
self.openTokHandler = nil;
self.title = nil;
self.navigationItem.leftBarButtonItem = nil;
self.kApiKey = nil;
self.kSessionId= nil;
self.kToken= nil;
[[NSNotificationCenter defaultCenter] removeObserver:self];
[self doCloseRoom];
}
-(void)doCloseRoom
{
__weak typeof(self) weakSelf = self;
[[RKObjectManager sharedManager] deleteObject:weakSelf.room
path:nil
parameters:nil
success:^(RKObjectRequestOperation *operation, RKMappingResult *mappingResult){
//NSLog(@"Mapping result %@", mappingResult);
}
failure:nil
];
}
-(void)startRetryTimer
{
NSLog(@"Timer Started");
self.retryTimer = [NSTimer scheduledTimerWithTimeInterval:(60*5)
target:self
selector:@selector(retry)
userInfo:nil
repeats:YES];
}
-(void)retry
{
[self doCloseRoom];
[self performSelector:@selector(performGetRoomRequest) withObject:nil afterDelay:4];
}
#pragma mark - label
- (void)updateStatusLabel:(NSString *) message withColor:(UIColor*) color animated:(bool) animated
{
self.statusLabel.text = message;
if (animated) {
[self fadeOutFadeInAnimation:self.statusLabel andColor:color];
} else{
[SRAnimationHelper stopAnimations:self.statusLabel];
}
}
- (void)fadeOutFadeInAnimation:(UILabel *)label andColor:(UIColor*)color
{
//add animation
[label.layer addAnimation:[SRAnimationHelper fadeOfRoomStatusLabel] forKey:nil];
//change label color
label.textColor = color;
}
#pragma mark - Progress Bar
-(void)configProgressBar
{
self.progressBar.progressTintColor = [UIColor orangeColor];
}
-(void)startProgressBar
{
self.progressBar.hidden = NO;
self.progressBar.progress = 0;
self.progressTimer = [NSTimer scheduledTimerWithTimeInterval:.5
target:self
selector:@selector(changeProgressValue)
userInfo:nil
repeats:YES];
}
-(void)stopTimer: (NSTimer*)timer
{
[timer invalidate];
timer = nil;
}
- (void)changeProgressValue
{
dispatch_async(dispatch_get_global_queue(DISPATCH_QUEUE_PRIORITY_DEFAULT, 0), ^{
float progressValue = self.progressBar.progress;
progressValue += .00834;
if (progressValue > .99)
{
progressValue = 1;
[self stopTimer:self.progressTimer];
return;
}
NSString* time =[NSString stringWithFormat:@"%.0f", 60 - ceil(progressValue*60)];
NSLog(@"Progress Value %f Time %@", progressValue, time);
NSString *message = [NSString stringWithFormat:@"Time Left: %@", time];
dispatch_async(dispatch_get_main_queue(), ^(void) {
self.progressBar.progress = progressValue;
[self updateStatusLabel:message withColor:[UIColor whiteColor] animated:NO];
});
});
}
@end