本文介绍了[__NSDictionaryI setObject：forKey：]：发送到实例的无法识别的选择器的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！
问题描述
我正在尝试将dateTime添加到我的词典中，定义如下：
I am trying to add "dateTime" to My dictionary as defined follows:
Symptom Ranking: {
5111ef19253b4a9150000000 = 1;
5111f029253b4add4e000000 = 1;
5111f036253b4a123d000001 = 1;
5111f045253b4a404f000000 = 1;
}
NSLog(@"date selected: %@", [[self.datePicker date] description])
[self.results setObject:[[self.datePicker date] description] forKey:@"dateTime"];
应用程序崩溃我得到了这个：
App crashes and I get this:
Symptom Tracker[43134:c07] -[__NSDictionaryI setObject:forKey:]: unrecognized selector sent to instance 0x7603990
2013-02-06 08:15:58.741 Symptom Tracker[43134:c07] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSDictionaryI setObject:forKey:]: unrecognized selector sent to instance 0x7603990'
*** First throw call stack:
(0x171b012 0x1428e7e 0x17a64bd 0x170abbc 0x170a94e 0x521e 0x143c705 0x373920 0x3738b8 0x434671 0x434bcf 0x433d38 0x3a333f 0x3a3552 0x3813aa 0x372cf8 0x2652df9 0x2652ad0 0x1690bf5 0x1690962 0x16c1bb6 0x16c0f44 0x16c0e1b 0x26517e3 0x2651668 0x37065c 0x25dd 0x2505)
推荐答案
你的字典是不可变的 - 它是 NSDictionary 而不是的NSMutableDictionary 。修复它，它会正常工作。
Your dictionary is immutable - it's an NSDictionary and not an NSMutableDictionary. Fix that, and it'll work fine.
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