[英]iOS NSJSON Returning Null
我有以下代码
hostStr = [hostStr stringByAppendingString:post];
NSData *dataURL = [NSData dataWithContentsOfURL: [ NSURL URLWithString: hostStr ]];
NSString *serverOutput = [[NSString alloc] initWithData:dataURL encoding: NSASCIIStringEncoding];
NSError *error = nil;
NSDictionary *result = [NSJSONSerialization
JSONObjectWithData:dataURL
options:kNilOptions
error:&error];
NSArray *files = [result objectForKey:@"GV_Return"];
NSLog(@"Files: %@", files);
// For Each Key we seperate the data and add it to an object to be used.
for (NSDictionary *file in files)
{
NSString *userNumber = [result objectForKey:@"UserNumber"];
NSLog(@"output: %@", userNumber);
}
我遇到的问题是NSLog(@“ Files:%@”,files); 返回我的期望
Files: (
{
UserNumber = 1;
}
)
但是NSLog(@“ output:%@”,userNumber); 返回NULL
我需要帮助弄清楚为什么NSString * userNumber = [result objectForKey:@“ UserNumber”]; 似乎不应该返回“ 1”。
将您的代码更改为:
for (NSDictionary *file in files)
{
NSString *userNumber = [file objectForKey:@"UserNumber"];
NSLog(@"output: %@", userNumber);
}
即file objectForKey...
,而不是result objectForKey...
您要遍历files
数组,并将其中的每个条目标识为file
,以用于for循环中的代码。
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