dealloc

Crash on EXC_Breakpoint Scroll View

由 狂风中的少年 提交于 2020-06-10 07:59:24
问题 This is a new problem I have been having ever since I've been updating my app for iOS 7. Everytime I launch the app on my device or simulator, I get this error code RecipeDetailViewController scrollViewDidScroll:]: message sent to deallocated instance 0x15746c40 and it crashed. I enabled NSZombie and that was the code it gave me. Before it was giving a exc_bad_access code. This is my code for ScrollViewDidSCroll - (void)scrollViewDidScroll:(UIScrollView *)scrollView{ // Depending on how far

Vector as a class member

由 扶醉桌前 提交于 2020-01-28 05:00:07
问题 Hello I have this question: I would like to have a vector as class member. This is perhaps my question easier for you and I apologize for that. how should I declare the vector? And is this correct? std::vector<int> *myVector; or std::vector<int> myVector ? how should I handle this vector in dealloc? How can I initialize the array into a if? Is this correct? if(myCondition) { if(!myVector) //is this correct? myVector = new std::vector<int>(); //is this correct? on this i have a error } 回答1:

ASIHTTPRequest dealloc and EXC_BAD_ACCESS problem

由 為{幸葍}努か 提交于 2020-01-13 19:28:37
问题 I'm using an array of ASIHTTPRequest wrappers (AsyncImageLoader) to download images for cells in a UITableView. I'm having problems handling ASIHTTPRequests lifetime. If I release them, I end up having a EXC_BAD_ACCESS if I keep scrolling up and down while they try to load images. Here's what my wrapper looks like. self.request has retain property, targetCell is the cell I want to put the image in: @implementation AsyncImageLoader - (void)loadImageFromURL:(NSString*)fileName target:

iOS memory management - clarifications

由 好久不见. 提交于 2020-01-05 07:44:10
问题 I know that alloc and retain will increase the reference count of an object. Is there any other different method that actually increment the reference count? And when/how does dealloc is called? 回答1: With these the retain count gets increased. new, however it can be seen as alloc+init. retain copy creates new object with retain count=1 mutableCopy creates new object with retain count=1 dealloc is called automatically as soon as retain count reaches to 0. 回答2: alloc allocates an object with

Why is dealloc not called on a brand new project (xcode 3.1.4)?

由 佐手、 提交于 2020-01-04 11:00:30
问题 I am starting to learn iPhone programming and this should be apparently a very easy question. I work in xcode 3.1.4. Now, when I create a new project of a window-based application and modify dealloc (in the AppDelegate.m file) so that it actually makes a print statement on the console, I actually can not see that statement. So, my question is why? So that I can avoid obvious answers, the modified dealloc is: - (void)dealloc { NSLog(@"Dealloc is called"); [window release]; [super dealloc]; }

Objective C - Where do you dealloc global static variables?

由 给你一囗甜甜゛ 提交于 2020-01-03 07:17:11
问题 Or, what is the opposite of +(void)initialize? Here's my situation: I have a class Unit, whose -(id)initWithName: function takes data from a global NSDictionary, which is created lazily, defined in the Unit.m file as: static NSMutableDictionary *unitLibrary = nil; Where do I call [unitLibrary release]? 回答1: You can call it at a location in which you know the dictionary is not needed anymore. If it is needed throughout the entire lifecycle of the application, then you don't have to do anything

key value observers were still registered with it when controller is deallocated

由 心不动则不痛 提交于 2020-01-01 06:32:24
问题 I added an observer in the code and then removed it in dealloc and viewWillDisappear but still i am getting an error stating *** Terminating app due to uncaught exception 'NSInternalInconsistencyException', reason: 'An instance 0x167e5980 of class MyController2 was deallocated while key value observers were still registered with it. Current observation info: <NSKeyValueObservationInfo 0x16719f90> ( <NSKeyValueObservance 0x16719fb0: Observer: 0x167e5980, Key path: dataContainer.report, Options

Calling a method on self while in dealloc

由 拈花ヽ惹草 提交于 2019-12-29 08:35:10
问题 I have a dictionary of objects that need to be cleaned up before they are released. I have a method that does this for the entire dictionary. Before I release the dictionary in my -dealloc method, I want to do the same thing. However, I am not sure of the state of the object during deallocation. In C# or Java, for instance, I would never call a method on the object being finalized, but I am not sure this applies to Objective C and deallocation. Is it acceptable to call the clean up method on

【iphone】viewDidUnload 和 dealloc 的区别

由 守給你的承諾、 提交于 2019-12-26 19:08:43
【推荐】2019 Java 开发者跳槽指南.pdf(吐血整理) >>> 对于iphone开发人员来说，内存管理是极为重要的技巧，哪怕程序的功能再强大，设计再漂亮，如果内存控制不好，也难逃程序莫名退出的噩运，这与网页开发是完全不同的。 内存控制里面有很多门道，在这里分析一下 viewDidUnload 和 dealloc 的区别，关于这两者的区别的文章很多，但是大都是摘抄和翻译官方文档，有的也只是简单的说两句，并没有详细说出两者具体的区别。 在了解两者之间的区别，首先要知道 view 的生命周期，google 里面有很多文章，可以先去搜一下，这里就不详解了。 顾名思义  viewDidUnload 就是当 view 被卸载以后执行的语句，它与 viewDidLoad 是相互呼应的。大家都知道官方的解释是执行类似 self.myOutlet = nil; 的命令，但是为什么这么干，什么时候调用这个方法呢? 这个方法是不能手动调用的，它实际上是当应用程序接收到手机内存警告的时候自动调用的方法，目的就是清空内存除当前 viewController 以外所有已经加载过的 viewController 里面的暂时不再使用的一些控件或数据，以避免应用程序应消耗内存过多被强制关闭。记住，是除当前正在展示的 view 所属 viewController 以外所有已经在内存里面的

Can this code works without overridden dealloc method (Objective-C)

由 假如想象 提交于 2019-12-24 19:09:02
问题 Manual memory management is used. The following code runs well and no crash occurs. But there is no -(void)dealloc method. Is this code wrong? Should I add -(void)dealloc ? MyClass.h #import <UIKit/UIKit.h> @interface MyClass : NSObject { @private BOOL flag; UIView *view; UILabel *label; UIButton *button; UITabBar *tabBar; UIWebView *webView; UIImageView *imageView; } @property (nonatomic, retain) UIView *view; @property (nonatomic, retain) UILabel *label; @property (nonatomic, retain)
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