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代码

        NSString *UserId = [NSString stringWithFormat:@"%ldAAAAAAATTTTTTTT.data", [PKUserInfoTool userInfo].uid];
        NSString *PKPostLablePath = [[NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject] stringByAppendingPathComponent:UserId];
        NSMutableArray *ary = [NSMutableArray array];
        for (int i = 0; i < 100; i++) {
            [ary addObject:[NSArray arrayWithObjects:[NSString stringWithFormat:@"label%d",i],@"123",@"456", nil]];
        }
        PKLog(@"pring in ram%@", ary);
        //写入数组
        [[NSFileManager defaultManager] removeItemAtPath:PKPostLablePath error:nil];
        [NSKeyedArchiver archiveRootObject:ary toFile:PKPostLablePath];
        //读取数组
        ary = nil;
        PKLog(@"read from local:%@", ary);
        ary = [NSKeyedUnarchiver unarchiveObjectWithFile:PKPostLablePath];
        PKLog(@"read from local:%@", ary);

数据内容

016-04-21 15:17:57.338 djcars[5590:140020] pring in ram[
	[
	label0,
	123,
	456
],
	[
	label1,
	123,
	456
],
	[
	label2,
	123,
	456
],
	[
	label3,
	123,
	456
],
	[
	label4,
	123,
	456
],
	[
	label5,
	123,
	456
],
	[
	label6,
	123,
	456
],
	[
	label7,
	123,
	456
],
	[
	label8,
	123,
	456
],
	[
	label9,
	123,
	456
]
]