獲取文件的QuickLook預覽圖像

Question

有沒有辦法獲得文件的快速預覽圖像？

我在尋找這樣的東西：

NSImage *image = [QuickLookPreviewer quickLookPreviewForFile:path];

Answer 1

請參閱QLThumbnailRequest中的QLThumbnailRequest ： https ： //developer.apple.com/library/mac/#documentation/UserExperience/Reference/QLThumbnailRequest_Ref/Reference/reference.html

NSURL *path = aFileUrl;

NSDictionary *options = [NSDictionary dictionaryWithObject:[NSNumber numberWithBool:NO] forKey:(NSString *)kQLThumbnailOptionIconModeKey];

CGImageRef ref = QLThumbnailImageCreate(kCFAllocatorDefault, (CFURLRef)path, CGSizeMake(600, 800 /* Or whatever size you want */), (CFDictionaryRef)options);

Answer 2

在Swift中，我最終得到了類似的東西（應該更換力量unwraps）：

let options = [
  kQLThumbnailOptionIconModeKey: false
]

let ref = QLThumbnailCreate(
  kCFAllocatorDefault,
  url as NSURL,
  CGSize(width: 150, height: 150),
  options as CFDictionary
)

let thumbnail = ref!.takeRetainedValue()
let cgImageRef = QLThumbnailCopyImage(thumbnail)
let cgImage = cgImageRef!.takeRetainedValue()
let image = NSImage(cgImage: cgImage, size: CGSize(width: cgImage.width, height: cgImage.height))