Question

我只想使用SBJSON框架解析Objective-C中的这个JSON字符串，并检索三个数据单元：

{"x":"197","y":"191","text":"this is a string"}

如何做到这一点？

Answer 1

NSString * jsonString = @"{\"x\":\"197\",\"y\":\"191\",\"text\":\"this is a string\"}";
SBJSON *jsonParser = [[SBJSON alloc] init];
NSDictionary * dictionary = [jsonParser objectWithString:jsonString];
NSLog(@"x is %@",[dictionary objectForKey:@"x"]);
[jsonParser release];

Answer 2

以下是一个例子：

NSString *jsonText = @"...";
SBJsonParser *parser = [[SBJsonParser alloc] init];
NSDictionary *dict = [parser objectWithString:jsonText];
for (NSString *key in [@"x y text" componentsSeparatedByString:@" "]) {
  NSLog(@"%@ => %@", key, [dict objectForKey]); 
}

这与SBJson4Parser类似：

id parser = [SBJson4Parser parserWithBlock:^(id v, BOOL *stop) {
    for (NSString *key in [@"x y text" componentsSeparatedByString:@" "]) {
        NSLog(@"%@ => %@", key, [v objectForKey]); 
    }
}
allowMultiRoot:NO
unwrapRootArray:NO
errorHandler:^(NSError *err) {
    // handle error here                                 
}];

NSString *jsonText = @"...";
[parser parse: [jsonText UTF8String]];

使用SBJSON在Objective-C中解析JSON

2 个答案: