iOS - 获取从照片卷轴中选择的图像的文件大小
<p><p>我正在构建一个应用程序，允许用户从他们的设备中选择照片和视频并将它们上传到服务器。试图获取每个项目选择的文件大小(以字节为单位)，有人可以帮我吗？</p>
<pre><code>if ( == ALAssetTypePhoto){ // image file
if (){
NSURL* urlPath=;
item = ;
item.itemImage = ;
item.itemType = 1; // image
item.itemSize = // what do I need here??
;
}
} else if ( == ALAssetTypeVideo){ // video file
if (){
NSURL* urlPath=;
item = ;
item.itemImage = ;
item.itemType = 2; // video
item.itemSize = // what do I need here??
;
}
}
</code></pre>
<p><strong>编辑</strong></p>
<p>通过视频获取 NSCocaoErrorDomain 256:</p>
<pre><code> NSURL* urlPath=;
item = ;
item.itemImage = ;
item.itemType = 2; // video
//Error Container
NSError *attributesError;
NSDictionary *fileAttributes = [ attributesOfItemAtPath: error:&attributesError];
NSNumber *fileSizeNumber = ;
long fileSize = ;
item.itemSize = fileSize;
;
</code></pre></p>
<br><hr><h1><strong>Best Answer-推荐答案</ strong></h1><br>
<p><p>仅用于<strong>图像</strong>数据选择:</p>
<pre><code>item.itemImage = (UIImage*);
NSData *imgData = UIImageJPEGRepresentation(item.itemImage, 1); //1 it represents the quality of the image.
NSLog(@"Size of Image(bytes):%d",);
</code></pre>
<p>希望这会对你有所帮助。</p>
<p>以下方法是泛化的，它适用于图像和视频:</p>
<p>这样的事情应该注意查找从 <strong>UIImagePickerController</strong></p> 返回的所选图像或视频的文件大小
<pre><code>- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary *)info
{
NSURL *videoUrl=(NSURL*);
//Error Container
NSError *attributesError;
NSDictionary *fileAttributes = [ attributesOfItemAtPath: error:&attributesError];
NSNumber *fileSizeNumber = ;
long long fileSize = ;
}
</code></pre></p>
<p style="font-size: 20px;">关于iOS - 获取从照片卷轴中选择的图像的文件大小，我们在Stack Overflow上找到一个类似的问题：
<a href="https://stackoverflow.com/questions/27244714/" rel="noreferrer noopener nofollow" style="color: red;">
https://stackoverflow.com/questions/27244714/
</a>
</p>
页:
[1]