[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from object

青旅半醒 2024-05-03 14:41 85阅读 0赞

错误：

// 苹果审核给的错误

CoreFoundation 0x1a1331dd0 +\[NSDictionary dictionaryWithObjects:forKeys:count:\] + 59

// 真实的错误

\[\_\_NSPlaceholderDictionary initWithObjects:forKeys:count:\]: attempt to insert nil object from objects\[0\]

\[\_\_NSPlaceholderDictionary initWithObjects:forKeys:count:\]: attempt to insert nil object from objects\[1\]

\[\_\_NSPlaceholderDictionary initWithObjects:forKeys:count:\]: attempt to insert nil object from objects\[0\]

\[\_\_NSPlaceholderDictionary initWithObjects:forKeys:count:\]: attempt to insert nil object from objects\[1\]

表示错误在NSDictionary/NSArray的第一位和第二位数据有问题

2.出现问题的原因

NSDictionary \*dic =@\{@"aaa":aaa\}； // 当aaa为nil的时候，就会出现：attempt to insert nil object from objects\[0\]

操作数据的正确方式：

(1.1)

// 存一个数据

NSUserDefaults \*userDefaultsTimer = \[NSUserDefaults standardUserDefaults\];

\[userDefaultsTimer setObject:@"2" forKey:@"NowPracticeType"\];

(1.2)

// 存多个数据

NSUserDefaults \*userDefaultsTimer = \[NSUserDefaults standardUserDefaults\];

NSMutableDictionary \*parmDic = \[NSMutableDictionary dictionary\];

\[parmDic setValue:@"aaa" forKey:@"aaa"\]; // 为nil的时候会自动过滤，不存入里面

\[parmDic setValue:@"bbb" forKey:@"bbb"\];

\[userDefaultsTimer setObject:parmDic forKey:@"userStudytime"\];

(2.1)

// 取一个数据

NSUserDefaults \*userDefaultsTimer = \[NSUserDefaults standardUserDefaults\];

NSString \*aaa = \[userDefaultsTimer objectForKey:@"NowPracticeType"\];

(2.2)

// 取多个数据

NSUserDefaults \*userDefaultsTimer = \[NSUserDefaults standardUserDefaults\];

NSMutableDictionary \*dicRecodeUserTimer = \[userDefaultsTimer objectForKey:@"userStudytime"\];

NSString \*aaa = dicRecodeUserTimer\[@"aaa"\];

NSString \*bbb = dicRecodeUserTimer\[@"bbb"\];

(3)

// 以参数的方式传递的时候

NSMutableDictionary \*paraDic = \[\[NSMutableDictionary alloc\] init\];

\[parmDic setValue:@"aaa" forKey:@"aaa"\];

\[parmDic setValue:@"bbb" forKey:@"bbb"\];

NSMutableDictionary \*para = \[NSMutableDictionary getpara:@"....接口名....." dic:paraDic\];

PS:请不要使用 NSDictionary \*dic =\[NSDictionary dictionaryWithObjectsAndKeys:@"xxx",@"xxx",nil\]; 这种方式创建数据

[__NSPlaceholderDictionary initWithObjects:forKeys:count:]: attempt to insert nil object from object

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