Question

因此，我在创建NSDictionary时收到此错误：

DLog(@"hiliteID: %@ | regionID: %@", hiliteID, regionID);

if ([hiliteID isKindOfClass:[NSNumber class]]) {
    DLog(@"hititeID is a number");
}
if ([hiliteID isKindOfClass:[NSString class]]) {
    DLog(@"hiliteID is a string");
}
if ([regionID isKindOfClass:[NSNumber class]]) {
    DLog(@"regionID is a number");
}
if ([regionID isKindOfClass:[NSString class]]) {
    DLog(@"regionID is a string");
}

NSDictionary *regionDictionary = [NSDictionary dictionaryWithObject:regionID forKey:hiliteID];
DLog(@"regionDictionary: %@", regionDictionary);

id result = [self.serverCall XMLRPCCall:kSaveHilitedObjects withObjects:@[self.mapContext, regionDictionary]];

记录的内容：

DEBUG | hiliteID: 160399 | regionID: 950
DEBUG | hititeID is a number
DEBUG | regionID is a number
DEBUG | regionDictionary: {
    160399 = 950;
}
DEBUG -[__NSCFNumber escapedString]: unrecognized selector sent to instance 0x7947f5d0
DEBUG *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFNumber escapedString]: unrecognized selector sent to instance 0x7947f5d0'

0x7947f5d0的值为160399，因此为hiliteID。

hiliteID是我们服务器返回的值，设置为NSString。我把它投到NSNumber：

NSArray *hiliteIDs = [result allKeys];

if ([[hiliteIDs firstObject] isKindOfClass:[NSString class]]) {
    return [NSNumber numberWithInteger:[[hiliteIDs firstObject] integerValue]];
}
else if ([[hiliteIDs firstObject] isKindOfClass:[NSNumber class]]) {
    return [hiliteIDs firstObject];
}

据我所知，我在这里做的事情没有问题。

行：

id result = [self.serverCall XMLRPCCall:kSaveHilitedObjects withObjects:@[self.mapContext, regionDictionary]];

我在代码中使用了这个类几十次，从来没有遇到过问题。

导致错误的原因是什么？

Answer 1

reason: '-[__NSCFNumber escapedString]: unrecognized selector sent to instance 0x7947f5d0'

有人试图从NSNumber类调用-escapedString方法，所以看起来问题是你需要NSString时传递NSNumber参数。尝试在NSDictionary中仅使用NSString值。

Answer 2

无论XMLRPCCall:withObjects:调用无效方法。我建议将此方法的所有输入都放入NSStrings，以便该调用不会内部调用NSNumbers NSNumber无法响应的NSString *regionIDString = [regionID stringValue]; NSString *hiliteIDString = [hiliteID stringValue]; NSDictionary *regionDictionary = [NSDictionary dictionaryWithObject:regionIDString forKey:hiliteIDString];上的方法。< / p>

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带有NSDictionary的NSCFNumber escapedString Error

2 个答案: