我不能为我的生活弄清楚如何使用我当前的设置保存我的数据！我试过使用NSUserDefaults，但因为我使用自定义对象它不起作用。我一直在试图弄清楚如何使用NSKeyedArchiver，但我无法弄清楚在哪里实现它。
AG_AddItemViewController.h
#import <UIKit/UIKit.h>
#import "AG_Storage.h"
@interface AG_AddItemViewController : UIViewController
@property AG_Storage *store;
@end
AG_AddItemViewController.m
#import "AG_AddItemViewController.h"
@interface AG_AddItemViewController()
@property(weak,nonatomic)IBOutlet UITextField *textField;
@property(weak,nonatomic)IBOutlet UIButton *doneButton;
@property IBOutlet UIDatePicker *datePicker;
@property NSMutableArray *defaultsArray;
@end
@implementation AG_AddItemViewController
- (void) prepareForSegue:(UIStoryboardSegue *)segue sender:(id)sender
{
if (sender != self.doneButton) return;
if (self.textField.text.length > 0) {
self.store =[[AG_Storage alloc] init];
self.store.itemName = self.textField.text;
self.store.completed = NO;
NSDate *dateChosen = self.datePicker.date;
self.store.creationDate = dateChosen;
NSLog(@"%@", self.store);
[self.defaultsArray addObject:self.textField.text];
}
}
- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
if (self) {
// Custom initialization
}
return self;
}
- (void)viewDidLoad
{
[super viewDidLoad];
// Do any additional setup after loading the view.
self.defaultsArray = [[NSMutableArray alloc] init];
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
AG_Storage
#import <Foundation/Foundation.h>
@interface AG_Storage : NSObject
@property NSString *itemName;
@property BOOL *completed;
@property NSDate *creationDate;
@property NSDate *todaysDate;
@end
AG_ViewController.h
#import <UIKit/UIKit.h>
@interface AG_ViewController : UIViewController <UITableViewDelegate, UITableViewDataSource>{
IBOutlet UITableView *tableView;
IBOutlet UILabel *todaysDate;
IBOutlet UILabel *subtractDate;
IBOutlet UILabel *addDate;
}
@end
AG_ViewController.m
#import "AG_ViewController.h"
#import "AG_Storage.h"
#import "AG_AddItemViewController.h"
@interface AG_ViewController ()
@property NSMutableArray *mainArray;
@property NSMutableArray *yesterdayArray;
@property NSMutableArray *tomorrowArray;
@property NSDate *todayDate;
@property NSDate *tomorrowsDate;
@property NSDate *yesterdaysDate;
@end
@implementation AG_ViewController
- (void)viewDidLoad
{
[super viewDidLoad];
self.mainArray = [[NSMutableArray alloc] init];
self.yesterdayArray = [[NSMutableArray alloc]init];
self.tomorrowArray = [[NSMutableArray alloc]init];
[self loadInitialData];
}
- (void)loadInitialData
{
// Do any additional setup after loading the view, typically from a nib.
//NSDate Info
NSTimeInterval secondsPerDay = 24 * 60 * 60;
NSDate *today = [[NSDate alloc]init];
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"MMMM dd, yyyy"];
self.todayDate = today;
self.tomorrowsDate = [today dateByAddingTimeInterval: secondsPerDay];
self.yesterdaysDate = [today dateByAddingTimeInterval: -secondsPerDay];
NSString *todayString = [dateFormat stringFromDate:self.todayDate];
NSString *tomorrowString = [dateFormat stringFromDate:self.tomorrowsDate];
NSString *yesterdayString = [dateFormat stringFromDate:self.yesterdaysDate];
todaysDate.text = todayString;
addDate.text = tomorrowString;
subtractDate.text = yesterdayString;
AG_Storage *theDateToday = [[AG_Storage alloc]init];
theDateToday.todaysDate = self.todayDate;
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
[defaults arrayForKey:todayString];
NSLog(@"Tried to load...");
[defaults synchronize];
}
- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section{
return [self.mainArray count];
}
- (UITableViewCell *)tableView:(UITableView *)tableViewer cellForRowAtIndexPath:(NSIndexPath *)indexPath{
UITableViewCell *cell = [tableViewer dequeueReusableCellWithIdentifier:@"thisCell"];
AG_Storage *toDoItem = [self.mainArray objectAtIndex:indexPath.row];
cell.textLabel.text = toDoItem.itemName;
if (toDoItem.completed) {
cell.accessoryType = UITableViewCellAccessoryCheckmark;
}
else{
cell.accessoryType = UITableViewCellAccessoryNone;
}
return cell;
}
- (IBAction)unwindToList:(UIStoryboardSegue *)segue
{
NSDateFormatter *dateFormat = [[NSDateFormatter alloc] init];
[dateFormat setDateFormat:@"MMMM dd, yyyy"];
AG_AddItemViewController *source = [segue sourceViewController];
AG_Storage *item = source.store;
NSDate *dateCreated = item.creationDate;
NSString *todayString = [dateFormat stringFromDate:self.todayDate];
NSString *dateCreatedString = [dateFormat stringFromDate:dateCreated];
NSString *tomorrowString = [dateFormat stringFromDate:self.tomorrowsDate];
NSString *yesterdayString = [dateFormat stringFromDate:self.yesterdaysDate];
//Set up file storage!
NSUserDefaults *defaults = [NSUserDefaults standardUserDefaults];
if (item.itemName != nil) {
if ([dateCreatedString isEqualToString:todayString]) {
[self.mainArray addObject:item];
[tableView reloadData];
[defaults setObject:self.mainArray forKey:todayString];
[defaults synchronize];
NSLog(@"Saved");
}
else if ([dateCreatedString isEqualToString:tomorrowString]){
[self.tomorrowArray addObject:item];
[tableView reloadData];
NSLog(@"THIS WORKED TOO :D");
}
else if ([dateCreatedString isEqualToString:yesterdayString]){
[self.yesterdayArray addObject:item];
[tableView reloadData];
NSLog(@"THIS WORKED");
}
else{
}
}
}
- (void)didReceiveMemoryWarning
{
[super didReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
#pragma mark - Table view delegate
- (void)tableView:(UITableView *)tableViewer didSelectRowAtIndexPath:(NSIndexPath *)indexPath
{
[tableViewer deselectRowAtIndexPath:indexPath animated:NO];
AG_Storage *tappedItem = [self.mainArray objectAtIndex:indexPath.row];
tappedItem.completed = !tappedItem.completed;
[tableViewer reloadRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationNone];
}
- (BOOL)tableView:(UITableView *)tableView canEditRowAtIndexPath:(NSIndexPath *)indexPath {
// Return YES if you want the specified item to be editable.
return YES;
}
// Override to support editing the table view.
- (void)tableView:(UITableView *)tableViews commitEditingStyle:(UITableViewCellEditingStyle)editingStyle forRowAtIndexPath:(NSIndexPath *)indexPath {
if (editingStyle == UITableViewCellEditingStyleDelete) {
[self.mainArray removeObjectAtIndex:indexPath.row];
[tableViews deleteRowsAtIndexPaths:@[indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}
}
@end
我想使用NSUserDefaults，因为它看似简单，但如果我不能那样。我出于某种原因无法绕过这个。
编辑：这就是我尝试实现Hyperbole的想法......
if (item.itemName != nil) {
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:item];
[[NSUserDefaults standardUserDefaults] setObject:data forKey:@"storageObjectKey"];
[[NSUserDefaults standardUserDefaults] synchronize];
if ([dateCreatedString isEqualToString:todayString]) {
[self.mainArray addObject:item];
[tableView reloadData];
NSData *data = [[NSUserDefaults standardUserDefaults] objectForKey:@"storageObjectKey"];
AG_Storage *someStorageObject = [NSKeyedUnarchiver unarchiveObjectWithData:data];
NSLog(@"%@", someStorageObject);
NSLog(@"Saved");
}
答案 0 :(得分：0)
我的建议是让AG_Storage声明符合NSSecureCoding协议，并在那里实现编码方法。完成之后，将AG_Storage个对象放入NSUserDefaults是一项微不足道的任务。
@interface AG_Storage : NSObject <NSSecureCoding>
@end
@implementation AG_Storage
+ (BOOL)supportsSecureCoding {
return YES;
}
- (void)encodeWithCoder:(NSCoder *)encoder {
[encoder encodeObject:self.itemName forKey:@"itemNameKey"];
[encoder encodeObject:@(self.completed) forKey:@"completedKey"];
[encoder encodeObject:self.creationDate forKey:@"creationDateKey"];
[encoder encodeObject:self.todaysDate forKey:@"todaysDateKey"]; // This one doesn't seem necessary to save, though I'm sure you would know better than I would.
}
- (id)initWithCoder:(NSCoder *)decoder {
if ([decoder respondsToSelector:@selector(decodeObjectOfClass:forKey:)]) // Secure coding is only available in iOS 6
{
self.itemName = [decoder decodeObjectOfClass:[NSString class] @"itemNameKey"];
self.completed = [[decoder decodeObjectOfClass:[NSNumber class] forKey:@"completedKey"] boolValue];
self.creationDate = [decoder decodeObjectOfClass:[NSDate class] forKey:@"creationDateKey"];
self.todaysDate = [decoder decodeObjectOfClass:[NSDate class] forKey:@"todaysDateKey"];
}
else
{
self.itemName = [decoder decodeObjectForKey:@"itemNameKey"];
self.completed = [[decoder decodeObjectForKey:@"completedKey"] boolValue];
self.creationDate = [decoder decodeObjectForKey:@"creationDateKey"];
self.todaysDate = [decoder decodeObjectForKey:@"todaysDateKey"];
}
@end
下一步是将其分解为NSData的实例，以便存储在NSUserDefaults中：
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:someAG_StorageObject];
[[NSUserDefaults standardUserDefaults] setObject:data forKey:@"storageObjectKey"];
[[NSUserDefaults standardUserDefaults] synchronize];
稍后检索它：
NSData *data = [[NSUserDefaults standardDefaults] objectForKey:@"storageObjectKey"];
AG_Storage *someStorageObject = [NSKeyedUnarchiver unarchiveObjectWithData:savedData];