iOS13歸檔功能削弱了流部？？纹坐？枝冀？，感覺object-c已經(jīng)不是Apple的親兒子了耘子，swift才是Apple的親兒子宾茂。

@interface Model : NSObject <NSCoding>
@property (nonatomic, strong) NSString *title;
@end

@implementation Model

- (instancetype)init
{
    self = [super init];
    if (self) {
        self.title = @"sssss";
    }
    return self;
}

- (instancetype)initWithCoder:(NSCoder *)coder
{
    self = [super init];
    if (self) {
        self.title = [coder decodeObjectForKey:@"title"];
    }
    return self;
}

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

1. NSKeyedArchiver歸檔

archiveRootObject:toFile:在iOS13中已棄用，替換為archivedDataWithRootObject:requiringSecureCoding:error:拴还，可以歸檔任何類型。

Model *model = [[Model alloc] init];
NSData *data = [NSKeyedArchiver archivedDataWithRootObject:model requiringSecureCoding:false error:nil];

2. NSKeyedUnarchiver解檔

unarchiveObjectWithFile:同樣在iOS13中被棄用欧聘，替換為unarchivedObjectOfClass:fromData:error:

Model *model0 = [NSKeyedUnarchiver unarchivedObjectOfClass:[Model class] fromData:data error:nil];

報錯：
Error Domain=NSCocoaErrorDomain Code=4864 "This decoder will only decode classes that adopt NSSecureCoding. Class 'Model' does not adopt it." UserInfo={NSDebugDescription=This decoder will only decode classes that adopt NSSecureCoding. Class 'Model' does not adopt it.}

分析錯誤注意到另一個協(xié)議NSSecureCoding

@interface Model : NSObject <NSCoding, NSSecureCoding>
@property (nonatomic, strong) NSString *title;
@end

+ (BOOL)supportsSecureCoding {
    return YES;
}

此處必須返回YES片林，如果返回NO同樣會報錯。
Error Domain=NSCocoaErrorDomain Code=4864 "Class 'Model' disallows secure coding. It must return YES from supportsSecureCoding." UserInfo={NSDebugDescription=Class 'Model' disallows secure coding. It must return YES from supportsSecureCoding.}

解檔的大坑

如果其中存在NSArray等集合怀骤，那么解檔同樣會失敗费封，不知原因。

@interface Model : NSObject <NSCoding, NSSecureCoding>
@property (nonatomic, strong) NSArray *title;
@end

報錯：
Error Domain=NSCocoaErrorDomain Code=4864 "value for key 'title' was of unexpected class 'NSArray'. Allowed classes are '{( Model )}'." UserInfo={NSDebugDescription=value for key 'title' was of unexpected class 'NSArray'. Allowed classes are '{( Model )}'.}

@interface Model : NSObject <NSCoding, NSSecureCoding>
@property (nonatomic, strong) NSDictionary *title;
@end

報錯：
Error Domain=NSCocoaErrorDomain Code=4864 "value for key 'title' was of unexpected class 'NSDictionary'. Allowed classes are '{( Model )}'." UserInfo={NSDebugDescription=value for key 'title' was of unexpected class 'NSDictionary'. Allowed classes are '{( Model )}'.}

解決方案

1. 建議轉(zhuǎn)化為JOSN字符串蒋伦，再進行歸檔解檔
2. 使用其他本地化方案