Question

我正在使用NSMutableArray并尝试从NSMutableArray中删除对象，然后崩溃

[[self.sectionsArray objectAtIndex：indexPath.section] removeObjectAtIndex：indexPath.row];

.h就像

NSMutableArray *sectionsArray;
@property (nonatomic, retain) NSMutableArray *sectionsArray;



.m is like:

 @synthesize sectionsArray;

 #pragma mark - TableView Delegate

 - (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
 {
// Perform segue to candy detail

NSLog(@"section: %d row: %d", indexPath.section, indexPath.row);
NSLog(@"section :%@", [[self.sectionsArray objectAtIndex:indexPath.section] objectAtIndex:indexPath.row]);
[[self.sectionsArray objectAtIndex:indexPath.section] removeObjectAtIndex:indexPath.row];
//    [tableView deleteRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationLeft];

 }

崩溃日志就像：

 2014-01-28 11:56:24.989 CandySearch[828:c07] section: 2 row: 0
 2014-01-28 11:56:24.991 CandySearch[828:c07] section :<Candy: 0x75a5a70>
 2014-01-28 11:56:24.992 CandySearch[828:c07] -[__NSArrayI removeObjectAtIndex:]: unrecognized selector sent to instance 0x75d8c90
 2014-01-28 11:56:24.992 CandySearch[828:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSArrayI removeObjectAtIndex:]: unrecognized selector sent to instance 0x75d8c90'
 *** First throw call stack:
 (0x1c9b012 0x10d8e7e 0x1d264bd 0x1c8abbc 0x1c8a94e 0x370d 0xcc285 0xcc4ed 0xad65b3 0x1c5a376 0x1c59e06 0x1c41a82 0x1c40f44 0x1c40e1b 0x1bf57e3 0x1bf5668 0x1cffc 0x1d52 0x1cc5 0x1)
 libc++abi.dylib: terminate called throwing an exception

我可以看到该索引处的对象。但它仍在崩溃为什么呢？

Answer 1

位于索引“indexPath.section”的数组是NSArray对象，而不是NSMutableArray 只需阅读崩溃日志： NSArrayI removeObjectAtIndex：

请检查sectionsArray的对象

Answer 2

您想在不可变数组（NSArray）中调用removeObjectAtIndex:。这就是为什么，它会导致崩溃。（那个，section数组是可变的，但它有不可变数组对象的数组。）

Answer 3

我的可变数组对象也因为被分配了NSArray而导致崩溃。所以，我通过使用

解决了这个问题

[NSMutableArray arrayWithArray:]

iOS中NSmutableArrays的NSMuatableArray的RemoveObjectAtIndex崩溃

3 个答案: