[英]NSMutabel 2 dimensional array not working
我正在从远程服务器拉一个二维数组:
- (NSMutableArray*)qBlock{
NSURL *url = [NSURL URLWithString:@"http://wsome.php"];
NSError *error;
NSStringEncoding encoding;
NSString *response = [[NSString alloc] initWithContentsOfURL:url
usedEncoding:&encoding
error:&error];
const char *convert = [response UTF8String];
NSString *responseString = [NSString stringWithUTF8String:convert];
NSMutableArray *sample = [responseString JSONValue];
return sample;
}
并将它们放入:
NSMutableArray *qnBlock1 = [self qBlock];
NSString *answer1 = [NSString stringWithFormat:[[qnBlock1 objectAtIndex:0]objectAtIndex:1]];
answer = [[NSMutableDictionary alloc]init];
[answer setObject:answer1 forKey:@"1"];
question1.text = [[qnBlock1 objectAtIndex:0] objectAtIndex:0];
label1a.text = [[qnBlock1 objectAtIndex:0]objectAtIndex:2];
label1b.text = [[qnBlock1 objectAtIndex:0]objectAtIndex:3];
label1c.text = [[qnBlock1 objectAtIndex:0]objectAtIndex:4];
label1d.text = [[qnBlock1 objectAtIndex:0]objectAtIndex:5];
我在运行时收到此错误
-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x6c179502012-04-30 09:43:50.794 AppName[371:f803] *** Terminating app due to uncaught exception 'NSInvalidArgumentException', reason: '-[__NSCFDictionary objectAtIndex:]: unrecognized selector sent to instance 0x6c17950'
这是由于二维数组的语法问题吗?
您没有找回多维数组。 您将获得NSDictionary对象的数组。 您收到的错误表明您正在尝试将消息objectAtIndex:
发送到NSDictionary对象,该对象失败,因为它没有这样的选择器。
更新:
在一边聊天之后,很明显以下事实是对的:
这是我提供的代码,用于让他遍历返回值:
NSURL *url = [NSURL URLWithString:@"{his url}"];
NSError *error;
NSStringEncoding encoding;
NSString *response = [[NSString alloc] initWithContentsOfURL:url usedEncoding:&encoding error:&error];
const char *convert = [response UTF8String];
NSString *responseString = [NSString stringWithUTF8String:convert];
NSLog(@"%@", responseString);
SBJsonParser *parser = [[SBJsonParser alloc] init];
id sample = [parser objectWithString:responseString];
if ([sample isKindOfClass:[NSDictionary class]]) {
for (id item in sample) {
NSLog(@"%@", [item description]);
NSArray *subArray = [sample objectForKey:item]; // b/c I know it's an array
for (NSString *str in subArray) {
NSLog(@"item: %@", str);
}
}
} else if ([sample isKindOfClass:[NSArray class]]) {
for (NSString *str in sample) {
NSLog(@"item: %@", str);
}
}
希望对您有帮助,J!
我认为从您的错误消息中,您正在将objectAtIndex发送到字典。 NSDictionary没有这种方法。 您应该改为使用objectForKey。
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