在我的 iOS 5 应用程序中,我有一个包含 JSON 字符串的 NSString
.我想将该 JSON 字符串表示反序列化为本机 NSDictionary
对象.
In my iOS 5 app, I have an NSString
that contains a JSON string. I would like to deserialize that JSON string representation into a native NSDictionary
object.
"{"password" : "1234", "user" : "andreas"}"
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:@"{"2":"3"}"
options:NSJSONReadingMutableContainers
error:&e];
-[__NSCFConstantString bytes]: unrecognized selector sent to instance 0x1372c
*** Terminating app due to uncaught exception 'NSInvalidArgumentException',
reason: '-[__NSCFConstantString bytes]: unrecognized selector sent to instance 0x1372c'
看起来你正在传递一个 NSString
参数,而你应该传递一个 NSData
参数:
It looks like you are passing an NSString
parameter where you should be passing an NSData
parameter:
NSError *jsonError;
NSData *objectData = [@"{"2":"3"}" dataUsingEncoding:NSUTF8StringEncoding];
NSDictionary *json = [NSJSONSerialization JSONObjectWithData:objectData
options:NSJSONReadingMutableContainers
error:&jsonError];
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