在 iOS 中使用安全编码取消归档自定义对象

Question

我正在像这样成功地对符合 NSSecureCoding 的对象数组进行编码。

NSData *data = [NSKeyedArchiver archivedDataWithRootObject:array requiringSecureCoding:YES error:nil];

如何取消存档此数据？我正在尝试这样，但它返回 nil。

NSError *error = nil;
NSArray<MyClass *> *array = [NSKeyedUnarchiver unarchivedObjectOfClass:[NSArray class] fromData:data error:&error];

这是错误吧returns。

The data couldn’t be read because it isn’t in the correct format.

Answer 1

这是一个简单的例子

@interface Secure:NSObject<NSSecureCoding> {
    NSString* name;
}
@property NSString* name;
@end

@implementation Secure
@synthesize name;

// Confirms to NSSecureCoding
+ (BOOL)supportsSecureCoding {
    return true;
}

- (void)encodeWithCoder:(nonnull NSCoder *)coder {
    [coder encodeObject:self.name forKey: @"name"];
}

- (nullable instancetype)initWithCoder:(nonnull NSCoder *)coder {
    self = [self init];
    if (self){
        self.name = [coder decodeObjectOfClass:[NSString class] forKey:@"name"];
    }
    return  self;
}

@end

用法

Secure *archive = [[Secure alloc] init];
    archive.name = @"ARC";
NSArray* array = @[archive];
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:array requiringSecureCoding:YES error:nil];
NSArray<Secure *> *unarchive = [NSKeyedUnarchiver unarchivedObjectOfClass:[NSObject class] fromData:data error:nil];
NSLog(@"%@", unarchive.firstObject.name);

在 iOS 中使用安全编码取消归档自定义对象

Unarchive custom object with secure coding in iOS

objective-c

nskeyedarchiver

ios

nskeyedunarchiver

nssecurecoding