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Copy pathViewController.m
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//
// ViewController.m
// KeyedArchiver
//
// Created by ad on 27/07/2017.
//
// 详细介绍：https://github.com/pro648/tips/wiki/%E6%95%B0%E6%8D%AE%E5%AD%98%E5%82%A8%E4%B9%8B%E5%BD%92%E6%A1%A3%E8%A7%A3%E6%A1%A3-NSKeyedArchiver-NSKeyedUnarchiver
#import "ViewController.h"
#import "Person.h"
@interface ViewController ()
@property (weak, nonatomic) IBOutlet UITextField *nameArchiver;
@property (weak, nonatomic) IBOutlet UITextField *ageArchiver;
@property (weak, nonatomic) IBOutlet UITextField *nameUnarchiver;
@property (weak, nonatomic) IBOutlet UITextField *ageUnarchiver;
@property (strong, nonatomic) NSString *documentsPath;
@property (strong, nonatomic) Person *person;
@end
@implementation ViewController
- (void)viewDidLoad {
[super viewDidLoad];
self.person = [[Person alloc] init];
[[NSNotificationCenter defaultCenter] addObserverForName:UIApplicationDidEnterBackgroundNotification object:nil queue:nil usingBlock:^(NSNotification * _Nonnull note) {
[self archiver:nil];
NSLog(@"archiver");
}];
}
- (void)dealloc {
[[NSNotificationCenter defaultCenter] removeObserver:self name:UIApplicationDidEnterBackgroundNotification object:nil];
}
- (void)didReceiveMemoryWarning {
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
- (NSString *)documentsPath {
if (!_documentsPath) {
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSApplicationSupportDirectory, NSUserDomainMask, YES);
if (paths.count > 0) {
_documentsPath = paths.firstObject;
// 如果目录不存在，则创建该目录。
if (! [[NSFileManager defaultManager] fileExistsAtPath:_documentsPath]) {
NSError *error;
// 创建该目录
if(! [[NSFileManager defaultManager] createDirectoryAtPath:_documentsPath withIntermediateDirectories:YES attributes:nil error:&error])
{
NSLog(@"Failed to create directory. error: %@",error);
}
}
}
}
return _documentsPath;
}
- (IBAction)archiver:(UIButton *)sender {
/*
// A 使用archiveRootObject: toFile: 方法归档。
// 1.修改当前目录为self.documentsPath。
NSFileManager *sharedFM = [NSFileManager defaultManager];
[sharedFM changeCurrentDirectoryPath:self.documentsPath];
// 2.归档。
if (![NSKeyedArchiver archiveRootObject:self.nameArchiver.text toFile:@"nameArchiver"]) {
NSLog(@"Failed to archive nameArchiver");
}
if (![NSKeyedArchiver archiveRootObject:self.ageArchiver.text toFile:@"ageArchiver"]) {
NSLog(@"Failed to archive ageArchiver");
}
*/
// B 使用initForWritingWithData: 归档。
// 1.把当前文本框内文本传送给person。
[self.person setName:self.nameArchiver.text age:[self.ageArchiver.text integerValue]];
// 2.使用initFoWritingWithData: 方法归档内容至mutableData。
NSMutableData *mutableData = [NSMutableData data];
NSKeyedArchiver *archiver = [[NSKeyedArchiver alloc] initForWritingWithMutableData:mutableData];
[archiver encodeObject:self.person forKey:@"person"];
[archiver finishEncoding];
// 3.把归档写入Library/Application Support/Data目录。
NSString *filePath = [self.documentsPath stringByAppendingPathComponent:@"Data"];
if (![mutableData writeToFile:filePath atomically:YES]) {
NSLog(@"Failed to write file to filePath");
}
}
- (IBAction)unarchiver:(UIButton *)sender {
/*
// A 使用unarchiveObjectWithFile: 读取归档。
// 1.获取归档路径。
NSString *nameArchiver = [self.documentsPath stringByAppendingPathComponent:@"nameArchiver"];
NSString *ageArchiver = [self.documentsPath stringByAppendingPathComponent:@"ageArchiver"];
// 2.读取归档，并将其赋值给对应文本框。
self.nameUnarchiver.text = [NSKeyedUnarchiver unarchiveObjectWithFile:nameArchiver];
self.ageUnarchiver.text = [NSKeyedUnarchiver unarchiveObjectWithFile:ageArchiver];
*/
// B 使用initForReadingWithData: 读取归档。
// 1.从Library/Application Support/Data目录获取归档文件。
NSString *filePath = [self.documentsPath stringByAppendingPathComponent:@"Data"];
NSData *data = [NSData dataWithContentsOfFile:filePath];
// 2.使用initForReadingWithData: 读取归档。
NSKeyedUnarchiver *unarchiver = [[NSKeyedUnarchiver alloc] initForReadingWithData:data];
self.person = [unarchiver decodeObjectForKey:@"person"];
[unarchiver finishDecoding];
// 3.把读取到的内容显示到对应文本框。
self.nameUnarchiver.text = self.person.name;
self.ageUnarchiver.text = [@(self.person.age) stringValue];
}
@end