NSArray (YYAdd)学习

/*
 typedef NS_ENUM(NSUInteger, NSPropertyListFormat) {
 NSPropertyListOpenStepFormat = kCFPropertyListOpenStepFormat, //明文
 NSPropertyListXMLFormat_v1_0 = kCFPropertyListXMLFormat_v1_0, //XML
 NSPropertyListBinaryFormat_v1_0 = kCFPropertyListBinaryFormat_v1_0 //二进制
 };
 
 typedef NS_OPTIONS(NSUInteger, NSPropertyListMutabilityOptions) {
 NSPropertyListImmutable = kCFPropertyListImmutable, //整个数据容器不变
 NSPropertyListMutableContainers = kCFPropertyListMutableContainers, //整个数据容器可变
 NSPropertyListMutableContainersAndLeaves = kCFPropertyListMutableContainersAndLeaves //叶子节点和容器都可变
 };
 */

+ (NSArray *)arrayWithPlistData:(NSData *)plist {
    if (!plist) return nil;
    NSArray *array = [NSPropertyListSerialization propertyListWithData:plist options:NSPropertyListImmutable format:NULL error:NULL];
    if ([array isKindOfClass:[NSArray class]]) return array;
    return nil;
}

+ (NSArray *)arrayWithPlistString:(NSString *)plist {
    if (!plist) return nil;
    NSData* data = [plist dataUsingEncoding:NSUTF8StringEncoding];
    return [self arrayWithPlistData:data];
}

- (NSData *)plistData {
    return [NSPropertyListSerialization dataWithPropertyList:self format:NSPropertyListBinaryFormat_v1_0 options:kNilOptions error:NULL];
}

- (NSString *)plistString {
    NSData *xmlData = [NSPropertyListSerialization dataWithPropertyList:self format:NSPropertyListXMLFormat_v1_0 options:kNilOptions error:NULL];
    if (xmlData) return xmlData.utf8String;
    return nil;
}