通过NSUserDefaults

Question

这是我的第一篇文章，所以请与我保持友好和建设性。

我试图通过NSuserDefauls与我的Today Extension共享一组自定义对象。

我知道我不能在NSUserdefaults中放置自定义对象，所以我用NSKeyedArchiver编写了它们 - NSKeyedUnarchiver来在NSData中对它们进行转换。

这是我的自定义类

    #import "Counter.h"

@implementation Counter

@dynamic city;
@dynamic address;
@dynamic event;
@dynamic date;
@dynamic time;
@dynamic counter;
@dynamic latitude;
@dynamic longitude;


- (void)encodeWithCoder:(NSCoder *)encoder
{

    //Encode properties, other class variables, etc
    [encoder encodeObject:self.city forKey:@"city"];
    [encoder encodeObject:self.address forKey:@"address"];
    [encoder encodeObject:self.event forKey:@"event"];
    [encoder encodeObject:self.date forKey:@"date"];
    [encoder encodeObject:self.time forKey:@"time"];
    [encoder encodeObject:self.counter forKey:@"counter"];
    [encoder encodeObject:self.latitude forKey:@"latitude"];
    [encoder encodeObject:self.longitude forKey:@"longitude"];


}
- (id)initWithCoder:(NSCoder *)decoder
{
    self = [super init];
    if( self != nil )
    {
        self.city = [decoder decodeObjectForKey:@"city"];
        self.address = [decoder decodeObjectForKey:@"address"];
        self.event = [decoder decodeObjectForKey:@"event"];
        self.date = [decoder decodeObjectForKey:@"date"];
        self.time = [decoder decodeObjectForKey:@"time"];
        self.counter = [decoder decodeObjectForKey:@"counter"];
        self.latitude = [decoder decodeObjectForKey:@"latitude"];
        self.longitude = [decoder decodeObjectForKey:@"longitude"] ;

    }
    return self;
}

@end

这是应用程序内的编码功能。

- (void)saveInUserDefault {

//Counter is my Custom class
//I'm Using MagicalRecord
NSArray *array = [Counter MR_findAllSortedBy:@"date" ascending:NO];

NSMutableArray *defaultMutableArray = [NSMutableArray arrayWithCapacity:array.count];

NSUserDefaults *defaultArray = [[NSUserDefaults alloc] initWithSuiteName:@"group.LorenzoLoRe.Everycount"];


for (Counter *cnt in array) {
    NSData *dataToDefault = [NSKeyedArchiver archivedDataWithRootObject:cnt];
    [defaultMutableArray addObject:dataToDefault];
}


[defaultArray setObject:defaultMutableArray forKey:@"counts"];
[defaultArray synchronize];
}

此时查看日志，数据似乎是在NSUserDefaults中写的

在这里，我尝试在Extension

中检索数据

-

 (void)takeLastCounts {

    NSUserDefaults *defaultArray = [[NSUserDefaults alloc] initWithSuiteName:@"group.company.product"];
    [defaultArray synchronize];

    NSArray  *dummyArray = [defaultArray arrayForKey:@"counts"];;
    NSMutableArray *arrayFromDefault= NULL;
    Counter *cter = nil;


   for (NSData *data in dummyArray) {
       cter = [NSKeyedUnarchiver unarchiveObjectWithData:data];
       [arrayFromDefault addObject:cter];
    }

    self.cnt_1 = arrayFromDefault[0];
    self.cnt_2 = arrayFromDefault[1];

    NSDateFormatter * formatter = [[NSDateFormatter alloc] init];
    [formatter setDateStyle:NSDateFormatterShortStyle];

    self.eventLabel.text = self.cnt_1.event;
    self.dateLabel.text = [formatter stringFromDate:self.cnt_1.date];
    self.counterLabel.text = self.cnt_1.counter.stringValue;
    self.timeLabel.text = self.cnt_1.time;

}

当我尝试执行扩展时，没有错误，只有空数组。 特别是NSArray *dummyArray = [defaultArray arrayForKey:@"counts"];似乎是空的，所以某些地方的数据不会流动。

我做错了什么？

任何形式的提示都将受到赞赏。