ios - 保存时 NSArrays 是否保持排序然后从 plist 中检索

Question

简单的问题是，当保存到 plist 然后检索时，NSArray 是否保持排序？

当我从 plist 检索数组时遇到排序问题，所以我很好奇。

我觉得也可能是这条线的问题。这些是否保持标题的顺序遵循 titleArr 的顺序？

NSMutableArray *allTitles = [[NSMutableArray alloc] init];
[allTitles addObjectsFromArray:titles];
[allTitles addObjectsFromArray:titleArr];

如何保存到 plist

imageInfo = [[NSMutableArray array] init];

    NSMutableArray *Listing = [NSMutableArray array];
    [imageInfo addObject:Listing];

    NSDictionary *Images = [NSDictionary dictionaryWithObjectsAndKeys:
                            allTitles, kKeyTitle,
                            allMediaUrls, kKeyThumbUrl,
                            allWidths, kKeyThumbWidth,
                            allHeights, kKeyThumbHeight,
                            nil];
    [Listing addObject:Images];


    NSArray *sysPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory ,NSUserDomainMask, YES);

    NSString *documentsDirectory = [sysPaths objectAtIndex:0];

    NSString *filePath = [documentsDirectory stringByAppendingPathComponent:@"image.plist"];

    NSLog(@"Plist File Path: %@", filePath);

    BOOL didWriteToFile = [imageInfo writeToFile:filePath atomically:YES];

    if (didWriteToFile) {
        NSLog(@"Write to .plist file is a SUCCESS!");
    } else {
        NSLog(@"Write to .plist file is a FAILURE!");
    }

Answer 1

是的，如果 titles 和 titleArr 被排序，那么 allTitles 也会被排序。

首先将添加所有标题对象，然后添加所有对象 titleArr，因为 addObjectsFromArray 方法开始向接收数组的末尾添加对象数组。

更多信息来自 Apple Docs

Adds the objects contained in another given array to the end of the receiving array’s content.

所以是的，plist 将有排序的数组。