didreceivememorywarning

问题 In new iOS 6, viewDidUnload is deprecated and we have been instructed to use didReceiveMemoryWarning instead, to manage objects in UIViewController instances and subclasses. Is it equally effective to assign nils to UIView kinds inside didReceiveMemoryWarning like the way it has been done inside viewDidUnload ? I am asking this because these two methods seems to be working differently. It seems like didReceiveMemoryWarning doesn't guarantee viewDidLoad to be called again to re-instantiate any

问题 Could anybody help me with this issue I'm a bit new to objective c and iOS. I've been working on it but I can't figure out how to fix the problem, My app is really simple it only start the camera take pictures and send them through email to our server. This code was working just fine in iOS6. When I take pictures my memory is heap growth with each screen capture and I get "Received Memory Warning" and finally - Terminated due to Memory Pressure. - -(void)imagePickerController:

问题 I 've never had problems with my app using AFNetworking, because I had like 20 imageview to show , but now my app crash because I want to set imagewithURL to 150 Imageviews, if I commented that line all is ok, this is my code: for (int i=0; i< Array.count; i++) { UIImageView *imgProd=[[UIImageView alloc] initWithFrame:CGRectMake(margenX, margenY, 220, 330)]; imgProd.contentMode = UIViewContentModeScaleAspectFill; imgProd.clipsToBounds = YES; [imgProd setTag:i]; // dispatch_async(dispatch_get

问题 I 've never had problems with my app using AFNetworking, because I had like 20 imageview to show , but now my app crash because I want to set imagewithURL to 150 Imageviews, if I commented that line all is ok, this is my code: for (int i=0; i< Array.count; i++) { UIImageView *imgProd=[[UIImageView alloc] initWithFrame:CGRectMake(margenX, margenY, 220, 330)]; imgProd.contentMode = UIViewContentModeScaleAspectFill; imgProd.clipsToBounds = YES; [imgProd setTag:i]; // dispatch_async(dispatch_get

问题 I'm developing an iOS app that use cordova(2.1), and some custom plugins. The problem that I'm trying to face is the following : When I show my plugin(basically a camera plugin with more features than the built-in cordova plugin) sometime I receive a memory warning and a consequent unload of the view containing the webview. This is a really huge issue for me because once my imagePicker is dismissed the webview is not restored. I had a look at the CDVCamera plugin source and what I noted is

问题 When the app receives a low memory warning message, 3 situations can happen : your app has just been launched and the user has not done anything special the app is running and there is a current context the app is in the background with some running context So when you receive this message, your are supposed to free memory... But where ? And how ? I understand that : initWith ..... must set the default static values. viewDidLoad must load any non static object didReceiveMemoryWarning must

问题 My app has a thread that does some time consuming job for more than a minute and the app consumes around 6.8MB of memory. I receive a memory warning after sometime and then it gets killed. There is nothing that I can release, and I am using not even 7MB of memory...driving me crazy...any advice please? 回答1: Maybe your memory is super-fragmented? Even 7mb full of leaked data shouldn't kill your app. You ought to have at least 20mb to play with. Try rebooting the phone and see if that helps.

问题 My iPad app makes heavy use of autorotation. This is great. However, I've noticed that if a hidden view is released by the default implementation of didReceiveMemoryWarning (as described here), when the view is re-loaded from the nib and I happen to be in landscape, it loads it in portrait. This wreaks havoc with the interface until I rotate the iPad manually and force it to go to the proper orientation. I had assumed that iOS would load the view in the current orientation; that's what it

问题 Is there a way to kill background apps? I have an app that I am working on that records a sound and then plots it out on a scroll view the problem I had with it is it crashes if the recording is too long because it runs out of memory trying to plot it. My fix to this is to monitor the amount of free memory and predict how much memory usage plotting will take and stop the recording just before there is not enough. The problem with that is the more apps I have running in the background the

问题 I don't know too much information about didReceiveMemoryWarning but considering what I read on other posts and looking for in the documentation, I've seen that in case of iOS 5, any non-visible view controller will dump its view, but in case of iOS 6 the documention (documentation says that the default implementation "exits" and I don't know exactly how I should understand that. I've been doing some tests with the iOS Simulator simulating a low-memory warning, and I appreciate (on iOS 5) that