//出现BUG的条件必须是两位数,且带两位小数,类型还必须是float
    //两位数:十位必须是7、8、9;个位数随意
    //两位小数:个位数随意;十位数必须是0
    NSString *jsonStr = @"{\"71.40\":71.40, \"97.40\":97.40, \"80.40\":80.40, \"188.40\":188.40}";
    NSLog(@"json:%@", jsonStr);
    NSData *jsonData_ = [jsonStr dataUsingEncoding:NSUTF8StringEncoding];
    NSError *jsonParsingError_ = nil;
    NSDictionary *dic = [NSMutableDictionary dictionaryWithDictionary:[NSJSONSerialization JSONObjectWithData:jsonData_ options:0 error:&jsonParsingError_]];
    NSLog(@"dic:%@", dic);
    /*结果:dic:{
     "188.40" = "188.4";
     "71.40" = "71.40000000000001";
     "80.40" = "80.40000000000001";
     "97.30" = "97.3";
     }*/