我的应用程序在模拟器中运行良好,但在设备上运行时,它以 SIGABRT 终止。我已将其缩小到以下代码:
- (void)loadImage {
int imageNumber = currentImageNumber;
// check to see if the image has already been downloaded.
// if not, get it and add it to an array
if ([imageData count] < totalNumberOfImages && (imageNumber + 1) > [imageData count]) {
NSString *urlString = [[mainMenuItem.imageDetails objectAtIndex: imageNumber] objectForKey: @"url"];
NSURL *url = [NSURL URLWithString: urlString];
NSData *data = [NSData dataWithContentsOfURL: url];
UIImage *image = [UIImage imageWithData: data];
[imageData addObject: image];
}
// set the image from the array
self.imageOnScreen = [imageData objectAtIndex: imageNumber];
}
它是 [imageData addObject:image]; 生成崩溃的消息,带有以下控制台输出:
2010-09-17 00:03:03.005 PilotsMate[17426:5e03] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '*** -[NSMutableArray insertObject:atIndex:]: attempt to insert nil object at 0'
*** Call stack at first throw:
(
0 CoreFoundation 0x313f4fd3 __exceptionPreprocess + 114
1 libobjc.A.dylib 0x3302f8a5 objc_exception_throw + 24
2 CoreFoundation 0x31377f99 -[__NSArrayM insertObject:atIndex:] + 472
3 CoreFoundation 0x31377da7 -[__NSArrayM addObject:] + 34
4 PilotsMate 0x00007c5d -[WeatherDetailViewController loadImage] + 300
5 PilotsMate 0x00007eb1 -[WeatherDetailViewController displayPicture:] + 232
6 Foundation 0x33265c9d -[NSThread main] + 44
7 Foundation 0x332ea9e1 __NSThread__main__ + 972
8 libSystem.B.dylib 0x3527598d _pthread_start + 248
9 libSystem.B.dylib 0x3526b0ec thread_assign_default + 4294967295
)
terminate called after throwing an instance of 'NSException'
[Switching to thread 11523]
[Switching to thread 11523]
Program received signal: “SIGABRT”.
kill
是什么导致了这种情况,因为模拟器中没有问题?我很困惑,很感谢您的意见。我所做的就是在 viewDidLoad 中初始化一个 NSMutableArray,然后将一个对象添加到数组中。如果我清理目标,发生的情况不会改变。奇怪,因为这部分应用程序几天前运行良好,我根本没有修改这个实现文件(我也没有更新到最新的 iOS 4.1,所以操作系统或 Xcode 版本也没有变化) .