ios - 使用BOOL创建NSDictionary时收到EXC_BAD_ACCESS(Code = EXC_ARM_DA_ALIGN)

Question

我正在尝试创建一个包含3个元素的字典对象，其中之一是BOOL值。我收到一个EXC_BAD_ACCESS(Code = EXC_ARM_DA_ALIGN，address = 0x5)，其中使用[NSDictionary dictionaryWithObjectsAndKeys:object，key，nil]将BOOL存储为对象

以下代码有什么问题:

- (void) retrieveAchievmentMetadata
{
[GKAchievementDescription loadAchievementDescriptionsWithCompletionHandler:
 ^(NSArray *descriptions, NSError *error) {
     if (error != nil)
     {
         // Process the error.
     }
     if (descriptions != nil)
     {

         [self setAchievementDescriptions:[[NSMutableDictionary alloc] init]]; 

         for (GKAchievementDescription *achievementDescription in descriptions) {

             NSDictionary *achievementData = [NSDictionary dictionaryWithObjectsAndKeys:
                                              [achievementDescription achievedDescription], @"Achieved Description",
                                              [achievementDescription maximumPoints], @"Maximum Points",
                                              [NSNumber numberWithBool:FALSE], @"Level Is Completed", nil];

             [achievementDescriptions setObject:achievementData forKey:[achievementDescription identifier]];

         }
     }
 }];

}

EXC_BAD_ACCESS错误在行上发生

[NSNumber numberWithBool:FALSE], @"Level Is Completed", nil];

Answer 1

崩溃的原因是[achievementDescription maximumPoints]，maximumPoints属性返回的是NSInteger而不是NSNumber实例。

将其更改为:[NSNumber numberWithInteger:[achievementDescription maximumPoints]], @"Maximum Points", ...