如何从PHImageManager中获取正方形缩略图？
如何从PHImageManager中获取正方形缩略图？
提问于 2014-09-25 01:52:54
有没有人知道如何从PHImageManager获取大拇指的方块？PHImageContentModeAspectFill选项不起作用。
[[PHImageManager defaultManager]
requestImageForAsset:(PHAsset *)_asset
targetSize:CGSizeMake(80, 80)
contentMode:PHImageContentModeAspectFill
options:nil
resultHandler:^(UIImage *result, NSDictionary *info) {
// sadly result is not a squared image
imageView.image = result;
}];回答 4
Stack Overflow用户
发布于 2015-04-16 22:45:37
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
options.resizeMode = PHImageRequestOptionsResizeModeExact;
NSInteger retinaMultiplier = [UIScreen mainScreen].scale;
CGSize retinaSquare = CGSizeMake(imageView.bounds.size.width * retinaMultiplier, imageView.bounds.size.height * retinaMultiplier);
[[PHImageManager defaultManager]
requestImageForAsset:(PHAsset *)_asset
targetSize:retinaSquare
contentMode:PHImageContentModeAspectFill
options:options
resultHandler:^(UIImage *result, NSDictionary *info) {
imageView.image =[UIImage imageWithCGImage:result.CGImage scale:retinaMultiplier orientation:result.imageOrientation];
}];Stack Overflow用户
发布于 2014-09-26 03:28:24
为了得到一个精确的正方形，你必须通过传递选项来指明你想要一个精确的大小，如下所示：
PHImageRequestOptions *options = [[PHImageRequestOptions alloc] init];
// No, really, we want this exact size
options.resizeMode = PHImageRequestOptionsResizeModeExact
[[PHImageManager defaultManager]
requestImageForAsset:(PHAsset *)_asset
targetSize:CGSizeMake(160, 160)
contentMode:PHImageContentModeAspectFill
options:options
resultHandler:^(UIImage *result, NSDictionary *info) {
// Happily, result is now a squared image
imageView.image = result;
}];Stack Overflow用户
发布于 2020-08-17 10:35:03
let squareSize = CGSize(100, 100)
let options = PHImageRequestOptions()
options.resizeMode = .exact
options.deliveryMode = .highQualityFormat
PHImageManager.default().requestImage(for: asset, targetSize: squareSize, contentMode: .aspectFill, options: options) { (image, _) in
// Use the image.
}页面原文内容由Stack Overflow提供。腾讯云小微IT领域专用引擎提供翻译支持
原文链接：
https://stackoverflow.com/questions/26023365
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