如何从ALAsset获取exif信息？

发布于 2024-12-20 19:26:17 字数 55 浏览 1 评论 0 原文

我需要从所选资产中获取 exif 信息并将其部分显示在屏幕上。

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雪花飘飘的天空 2024-12-27 19:26:17

[[asset defaultRepresentation] metadata];

返回给定资产表示的元数据字典的字典。查看此字典中是否有您感兴趣的数据。我不确定，但我认为该字典（和子字典）中的键与 CGImageProperties 参考。

[[asset defaultRepresentation] metadata];

returns a dictionary of dictionaries of metadata for the given asset representation. Check out this dictionary for the data you're interested in. I am not sure but I think the keys in that dictionary (and subdictionaries) are the same as the ones listed under CGImageProperties Reference.

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好久不见√ 2024-12-27 19:26:17

这是一个完整的答案......全部集中在一个

NSDictionary *nsd = [[asset3 defaultRepresentation] metadata];
    NSString *widthStr = [nsd objectForKey: @"PixelWidth"];
    NSString *heightStr = [nsd objectForKey: @"PixelHeight"];

    NSLog(@"nsd: %@ ... widthStr: %@ ... heightStr: %@ ...", nsd, widthStr, heightStr);

输出中：

nsd: {
    ColorModel = RGB;
    DPIHeight = 72;
    DPIWidth = 72;
    Depth = 8;
    Orientation = 1;
    PixelHeight = 1136;
    PixelWidth = 642;
    "{Exif}" =     {
        ColorSpace = 1;
        ComponentsConfiguration =         (
            1,
            2,
            3,
            0
        );
        ExifVersion =         (
            2,
            2,
            1
        );
        FlashPixVersion =         (
            1,
            0
        );
        PixelXDimension = 642;
        PixelYDimension = 1136;
        SceneCaptureType = 0;
    };
    "{TIFF}" =     {
        Orientation = 1;
        ResolutionUnit = 2;
        XResolution = 72;
        YResolution = 72;
    };
} ... widthStr: 642 ... heightStr: 1136 ...

This is a complete answer ... all in one spot

NSDictionary *nsd = [[asset3 defaultRepresentation] metadata];
    NSString *widthStr = [nsd objectForKey: @"PixelWidth"];
    NSString *heightStr = [nsd objectForKey: @"PixelHeight"];

    NSLog(@"nsd: %@ ... widthStr: %@ ... heightStr: %@ ...", nsd, widthStr, heightStr);

output:

nsd: {
    ColorModel = RGB;
    DPIHeight = 72;
    DPIWidth = 72;
    Depth = 8;
    Orientation = 1;
    PixelHeight = 1136;
    PixelWidth = 642;
    "{Exif}" =     {
        ColorSpace = 1;
        ComponentsConfiguration =         (
            1,
            2,
            3,
            0
        );
        ExifVersion =         (
            2,
            2,
            1
        );
        FlashPixVersion =         (
            1,
            0
        );
        PixelXDimension = 642;
        PixelYDimension = 1136;
        SceneCaptureType = 0;
    };
    "{TIFF}" =     {
        Orientation = 1;
        ResolutionUnit = 2;
        XResolution = 72;
        YResolution = 72;
    };
} ... widthStr: 642 ... heightStr: 1136 ...

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~没有更多了~