我NSArray NSDictionaries JSON来自服务器NSDictinoary格式。我想再向NSarray NSdictionaries添加一个Nsdictionary。 Table = (
{
Name = “xyz”;
Recordid = 3;
prefrenceorder = 1;
},
{
Name = “ABC”;
Recordid = 2;
prefrenceorder = 2;
},
{
Name = “swe”;
Recordid = 450;
prefrenceorder = 3;
},
{
Name = “asd”;
Recordid = 451;
prefrenceorder = 4;
}
);
基于键值对。这是我得到的回应。我想在＆＃34; table＆＃34;中添加另一个相同格式的字典。请帮助..
提前致谢.. !!
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at org.apache.hadoop.ipc.RPC$Invoker.invoke(RPC.java:225)
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at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:396)
at org.apache.hadoop.ipc.RPC.getProxy(RPC.java:379)
at org.apache.hadoop.hdfs.DFSClient.createRPCNamenode(DFSClient.java:118)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:222)
at org.apache.hadoop.hdfs.DFSClient.<init>(DFSClient.java:187)
at org.apache.hadoop.hdfs.DistributedFileSystem.initialize(DistributedFileSystem.java:89)
at org.apache.hadoop.fs.FileSystem.createFileSystem(FileSystem.java:1328)
at org.apache.hadoop.fs.FileSystem.access$200(FileSystem.java:65)
at org.apache.hadoop.fs.FileSystem$Cache.get(FileSystem.java:1346)
at org.apache.hadoop.fs.FileSystem.get(FileSystem.java:244)
at org.apache.hadoop.fs.Path.getFileSystem(Path.java:187)
at org.apache.hadoop.mapreduce.lib.input.FileInputFormat.setInputPaths(FileInputFormat.java:352)
at pir.PIR.run(PIR.java:317)
at org.apache.hadoop.util.ToolRunner.run(ToolRunner.java:65)
at pir.PIR.main(PIR.java:256)
答案 0 :(得分：1)
由于来自服务器的NSArray是不可变的，所以你需要创建一个新的NSMutableArray实例来添加你自己的字典，其响应来自服务器。
NSMutableArray *newTable = [NSMutableArray arrayWithArray:Table];
[newTable addObject:your_new_dictionary];
答案 1 :(得分：1)
将NSDictionary放入NSMutableArray。然后从您的实例添加新对象NSDictionary
即
//The array which has your NSDictionary objects
NSArray *array;
//Putting this array into mutable one in order to add and delete elements
NSMutableArray *mArray = [array mutableCopy];
//Your custom object that you want to add
NSDictionary *yourObject;
//Add it to the array and voila
[mArray addObject:yourObject];
答案 2 :(得分：0)
最好不要将不可变数组转换为可变数组，而是使用适当的NSJSONSerialization选项 - NSJSONReadingMutableContainers
指定将数组和字典创建为可变对象。
NSMutableArray *mutableArray = [NSJSONSerialization JSONObjectWithData:yourData options:NSJSONReadingMutableContainers error:nil];
[mutableArray addObject:yourNewDictionary];