ios - 单例 - 错误 : [CFString isNSString__] message sent to deallocated instance

Question

我在单例中有一个 NSMutableArray，我想在两个类中访问它。我在另一个项目中完成了这一点，与此完全相同(那个项目有 ARC，这个没有)并且它在那里工作。

项目未启用 ARC。

我收到错误:

*** -[CFString isNSString__]: message sent to deallocated instance 0xb3d1db0

StoreVars.h

@interface StoreVars : NSObject
@property (nonatomic, retain) NSMutableArray *sharedArrayOfVideo;
+ (StoreVars *)sharedInstance;
@end

StoreVars.m

@implementation StoreVars
@synthesize sharedArrayOfVideo;
+ (StoreVars *) sharedInstance {
    static StoreVars *myInstance = nil;
    if (myInstance == nil) {
        myInstance = [[[[self class] alloc] init] retain];
        myInstance.sharedArrayOfVideo = [[NSMutableArray alloc] init];
    }
    return myInstance;
}
@end

异步填充数组:

NSDictionary *tempDict = [[NSDictionary alloc] initWithObjectsAndKeys:
                                      ID,@"id",
                                      title,@"title", nil];
[[StoreVars sharedInstance].sharedArrayOfVideo addObject:tempDict];

这是发生崩溃的地方:

 NSLog(@"%i",[[StoreVars sharedInstance].sharedArrayOfVideo count]);
 NSLog(@"%@",[StoreVars sharedInstance]);
 if ([[StoreVars sharedInstance] respondsToSelector:@selector(sharedArrayOfVideo)]) {
        **NSLog(@"%@",[StoreVars sharedInstance].sharedArrayOfVideo);**
       //NSLog(@"%@",[[StoreVars sharedInstance].sharedArrayOfVideo objectAtIndex:8]);
}

输出:

10
<StoreVars: 0xb381b00>
*** -[CFString isNSString__]: message sent to deallocated instance 0xb3d1db0

Answer 1

发现问题，在创建字典时，我这样做了:

NSString *ID = [[[arrayOfEntry objectAtIndex:index] objectForKey:@"id"]; autorelease]

NSString *title = [[[arrayOfEntry objectAtIndex:index] objectForKey:@"title"] autorelease];

代替:

 NSString *ID = [[arrayOfEntry objectAtIndex:index] objectForKey:@"id"];

 NSString *title = [[arrayOfEntry objectAtIndex:index] objectForKey:@"title"];


 NSDictionary *tempDict = [NSDictionary dictionaryWithObjectsAndKeys:ID,@"id",title,@"title", nil];