exc-bad-access

问题 I know how to fix the problem that I am about to outline, however, I am a bit baffled as to why the code scenario works in the iOS simulator but not on my iPad. I have a method that checks various properties, and then sets the background color of a CALayer depending on the state of a property. The following code is similar to my method of color assignment: //This will be the CALayer BGColor... CGColor c = UIColor.blueColor.CGColor; //Blue is the default switch (myState) { case state_one: c =

问题 My program displays a horizontal scrolling surface tiled with UIImageViews from left to right. Code runs on the UI thread to ensure that newly-visible UIImageViews have a freshly loaded UIImage assigned to them. The loading happens on a background thread. Everything works almost fine, except there is a stutter as each image becomes visible. At first I thought my background worker was locking something in the UI thread. I spent a lot of time looking at it and eventually realized that the

问题 I'm new to iPhone development and Xcode in general and have no idea how to begin troubleshooting an EXC_BAD_ACCESS signal. How can I get Xcode to break at the exact line that is causing the error? I can't seem to get Xcode to stop on the line causing the problem, but I do see the following lines in my debug console: Sun Oct 25 15:12:14 jasonsmacbook TestProject[1289] : CGContextSetStrokeColorWithColor: invalid context Sun Oct 25 15:12:14 jasonsmacbook TestProject[1289] : CGContextSetLineWidth

问题 I have two views: the first one is a UITableView in plain style (created programmatically); the second one is a UIScrollView that contains an image and a UITableView in grouped style (also created programmatically). When I navigate from the firstView -> secondView everything works fine. However if I come back to the firstView and then I try to navigate firstView ->secondView for the second time, I get a EXC_BAD_ACCESS error. UPDATE This is the code of the UITableView delegate in the

问题 I have two views: the first one is a UITableView in plain style (created programmatically); the second one is a UIScrollView that contains an image and a UITableView in grouped style (also created programmatically). When I navigate from the firstView -> secondView everything works fine. However if I come back to the firstView and then I try to navigate firstView ->secondView for the second time, I get a EXC_BAD_ACCESS error. UPDATE This is the code of the UITableView delegate in the

问题 I have a simple program which was working with IOS4 and 5. Now with IOS 6 I'm getting the following error message: 2012-10-05 11:08:16.386 app[1698:19d03] 2012-10-05 09:08:11 +0000 2012-10-05 11:08:18.072 app[1698:19d03] 2012-10-05 09:08:11 +0000 2012-10-05 11:08:19.273 app[1698:19d03] 2012-10-05 09:08:11 +0000 2012-10-05 11:08:19.274 app[1698:19d03] 2012-10-05 09:08:11 +0000 2012-10-05 11:08:19.275 app[1698:19d03] 0 2012-10-05 11:08:25.055 app[1698:19d03] 2011-10-05 09:08:11 +0000 2012-10-05

问题 I have this code for loading the UITableView: - (int)numberOfSectionsInTableView:(UITableView *)tableView { if (tableView == self.peopleTableView) return [self.people count]; else return [[[self.scheduleDays objectAtIndex:self.dayInt] periods] count]; } - (int)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section { if (tableView == self.peopleTableView) return [[self.people objectAtIndex:section] count]; else return 1; } - (NSString *)tableView:(UITableView *)tableView

问题 in our iPad-App we are using an UIWebView to load different sites from one domain some of them with a hml5-Video. Sites without a Video do load perfectly. But when I'm loading a site containing htmlt5-video sometimes my app crashes during the loading-process of the UIWebView with EXC_BAD_ACCESS and sometimes it does not. Whenever such a crash occurs it seems to happen at the point where the Video-Player is added into the site. I did download the UICatalog-Example from Apple and just did

问题 Program received signal: “EXC_BAD_ACCESS”. (gdb) bt #0 0x30011940 in objc_msgSend () #1 0x30235f24 in CFRelease () #2 0x308f497c in -[UIImage dealloc] () #3 0x30236b78 in -[NSObject release] () #4 0x30a002a0 in FlushNamedImage () #5 0x30250a26 in CFDictionaryApplyFunction () #6 0x30a001a4 in _UISharedImageFlushAll () #7 0x30a00738 in +[UIImage(UIImageInternal) _flushCacheOnMemoryWarning:] () #8 0x3054dc80 in _nsnote_callback () #9 0x3024ea58 in _CFXNotificationPostNotification () #10

问题 I was reading this question and still can't figure out something. I placed breakpoints at AA & BB and saw that first AA happens which means destinationPlacemark gets instantiated. later at line BB I po destinationPlacemark and get error : expression produced error: error: Execution was interrupted, reason: EXC_BAD_ACCESS (code=1, address=0x10). The process has been returned to the state before expression evaluation. I read some of the answers found here but they are talking about a released