iOS 读取Json 代码

NSString* path = [[NSBundle mainBundle] pathForResource: @"Sandwiches"
ofType: @"json"];
NSString* data = [NSString stringWithContentsOfFile: path
encoding: NSUTF8StringEncoding
error: nil];

NSData* resultData = [data dataUsingEncoding:NSUTF8StringEncoding];
_sandwiches = [NSJSONSerialization JSONObjectWithData:resultData
options:kNilOptions
error:nil];