我有一个为 iOS 4.x 编写的项目。最近我使用 XCode 4.3.2 将它更新到 iOS5。奇怪的是,在使用 Apple LLVM 编译器时,应用程序每次都停止并出现双重释放错误。在我改回 LLVM GCC 后,它工作正常。这两者有什么区别吗?代码如下所示:
- (NSArray *)readCourselist {
NSString *path = [[self currentUserPathString] stringByAppendingPathComponent:kUserCourseListFilename];
return [NSArray arrayWithContentsOfFile:path];
}
- (NSArray *)getCourselist {
NSArray *courseRawArray = [self readCourselist];
for (NSDictionary *courseDic in courseRawArray) {
CourseModel *courseModel = [[CourseModel alloc] init];
courseModel.courseID = [[courseDic objectForKey:kKeyID] intValue];
courseModel.courseNameString = [courseDic objectForKey:kKeyTitle];
NSArray *lectureArray = [courseDic objectForKey:kKeyLecture];
for (NSDictionary *lectureDic in lectureArray) {
LectureModel *lectureModel = [[LectureModel alloc] init];
NSString *startString = [lectureDic objectForKey:kKeyStart];
if ([startString isEqualToString:@"8:00"]) {
lectureModel.lectureNumber = 1;
}
else if ([startString isEqualToString:@"9:50"]) {
lectureModel.lectureNumber = 2;
}
lectureModel.location = [lectureDic objectForKey:kKeyWhere]; //@property of location is retain
[courseModel.lectureArray addObject:lectureModel];
[lectureModel release];
}
[courseArray addObject:courseModel];
[courseModel release];
}
}
随着更多的追踪,我发现它是
lectureModel.location = [lectureDic objectForKey:kKeyWhere];
这真的很重要。在我的 LectureModel 中,位置声明如下
@property (nonatomic, retain) NSString *location;
@synthesize location;
- (id)init {
location = NSLocalizedString(@"未知", nil);
}
删除 NSLocalizedString 一切正常。为什么?