objective-c - 获取文件的 QuickLook 预览图像

Question

有什么方法可以快速查看文件的预览图像？

我正在寻找这样的东西:

NSImage *image = [QuickLookPreviewer quickLookPreviewForFile:path];

Answer 1

请参阅文档中的 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);