我有一个nsdictionaries
的数组
,每个字典都有一个boolean
值,我想更改boolean
当用户选择该行时的值。
但不知怎的,我得到了exc_bad_access
。
这是如何设置字典数组:
self.choosedfiles=[[NSMutableArray alloc] init];
for (NSString *s in fileListINDoc){
NSArray *partialDates =[s componentsSeparatedByString:@"."];//split string where - chars are found
NSFileManager* fm = [NSFileManager defaultManager];
NSDictionary* attrs = [fm attributesOfItemAtPath:[dataPath stringByAppendingPathComponent:s] error:nil];
NSDate *dateLocal =(NSDate*)[attrs objectForKey: NSFileModificationDate];
//creatre unique name for image _AKIAIVLFQKMSRN5JLZJA
NSString *uniqueFileName=[NSString stringWithFormat:@"%@_AKIAIVLFQKMSRN5JLZJA_%@.jpeg",[partialDates objectAtIndex: 0],[partialDates objectAtIndex: 1]];
BOOL isFileChoosen=NO;
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:
dateLocal,@"date",uniqueFileName,@"imagename",s,@"name",isFileChoosen,@"isFileChoosen",
nil];
[tempArray addObject:params];
}
NSSortDescriptor *descriptor=[[NSSortDescriptor alloc] initWithKey:@"date" ascending:NO];
NSArray *descriptors=[NSArray arrayWithObject: descriptor];
NSArray *reverseOrder=[tempArray sortedArrayUsingDescriptors:descriptors];
self.files=[[NSMutableArray alloc] initWithArray:reverseOrder];
当我尝试更改 boolean 值时,这会导致错误,XCODE
将行 *params
字典显示为错误:
- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
NSDictionary *currentArticle = [self.files objectAtIndex:indexPath.row];
NSNumber* ischoosenObject =[currentArticle objectForKey:@"isFileChoosen"];
if ([ischoosenObject boolValue]==NO) {
BOOL isFileChoosen=YES;
NSDictionary *params = [NSDictionary dictionaryWithObjectsAndKeys:[currentArticle objectForKey:@"date"],@"date",[currentArticle objectForKey:@"imagename"],@"imagename",[currentArticle objectForKey:@"name"],@"name",isFileChoosen,@"isFileChoosen",nil];
[self.files replaceObjectAtIndex:indexPath.row withObject:params];
[self.choosedfiles addObject:[currentArticle objectForKey:@"name"]];
}
}
上面的代码可能有什么问题? 谢谢,
空间
最佳答案
Objective-C 集合类只能保存对象,不能保存原始类型,因此需要更改:
BOOL isFileChoosen=YES;
致:
NSNumber *isFileChosen = [NSNumber numberWithBool:YES];
为了有效地将 boolean 值包装到一个对象中。
(当然,这会对代码的其他部分产生一些影响)。
关于ios - 更改 nsdictionary 中的 bool 值时的 EXC_BAD_ACCESS,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/17526883/