blocks|key|1156172|text|最简单的方法是将名称和文件类型分别存储在数据库中，并使用第一种方法检索它们。我不确定您能否成功实现后一种方法。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1156173|entityMap^0|0^^$0|@$1|2|3|4|5|6|7|D|8|@]|9|@]|A|$]]|$1|B|3|-4|5|6|7|E|8|@]|9|@]|A|$]]]|C|$]]

The easiest way is to store the name and file type in your database separately, and retrieve them using the first method.I'm not sure that you can be successful in implementing the latter one.

blocks|key|1371236|text|为什么不拆分从DB得到的字符串呢？|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1371237|NSString*+fullFileName+=+@"image.jpg";
NSString*+fileName+=+[[fullFileName+lastPathComponent]+stringByDeletingPathExtension];
NSString*+extension+=+[fullFileName+pathExtension];|code-block|syntax|javascript|1371238|现在您可以简单地使用：|1371239|[[NSBundle+mainBundle]+pathForResource:fileName+ofType:extension]];|1371240|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|N|8|@]|9|@]|A|$E|F]]|$1|G|3|H|5|6|7|O|8|@]|9|@]|A|$]]|$1|I|3|J|5|D|7|P|8|@]|9|@]|A|$E|F]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

Why don't you split the string that you get from the DB? 

<pre><code>NSString* fullFileName = @"image.jpg";
NSString* fileName = [[fullFileName lastPathComponent] stringByDeletingPathExtension];
NSString* extension = [fullFileName pathExtension];
</code></pre>

Now you can simply use:

<pre><code>[[NSBundle mainBundle] pathForResource:fileName ofType:extension]];
</code></pre>

blocks|key|1371318|text|-+(NSData+*)applicationDataFromFile:(NSString+*)fileName+{
++++NSArray+*paths+=+NSSearchPathForDirectoriesInDomains(NSDocumentDirectory,+NSUserDomainMask,+YES);
++++NSString+*documentsDirectory+=+[paths+objectAtIndex:0];
++++NSString+*appFile+=+[documentsDirectory+stringByAppendingPathComponent:fileName];
++++NSData+*myData+=+[[[NSData+alloc]+initWithContentsOfFile:appFile]+autorelease];
++++return+myData;
}|type|code-block|depth|inlineStyleRanges|entityRanges|data|syntax|javascript|1371319|摘自http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/FilesandNetworking/FilesandNetworking.html#//apple_ref/doc/uid/TP40007072-CH21-SW21|unstyled|offset|length|1371320|如果你想让它返回一个UIImage而不是一个NSData，可以很容易的修改。|1371321|而且，在编译之前，您没有说明是将图像保存到文档目录，还是将其添加到应用程序包中。因为如果是后者，您可以使用[UIImage+imageNamed:(NSString+*)filename]来获取图像。它需要一个扩展名作为文件名的一部分。|style|CODE|1371322|entityMap|0|LINK|mutability|MUTABLE|url|http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/FilesandNetworking/FilesandNetworking.html#//apple_ref/doc/uid/TP40007072-CH21-SW21^0|0|2|52|0|0|0|1H|15|0^^$0|@$1|2|3|4|5|6|7|W|8|@]|9|@]|A|$B|C]]|$1|D|3|E|5|F|7|X|8|@]|9|@$G|Y|H|Z|1|10]]|A|$]]|$1|I|3|J|5|F|7|11|8|@]|9|@]|A|$]]|$1|K|3|L|5|F|7|12|8|@$G|13|H|14|M|N]]|9|@]|A|$]]|$1|O|3|-4|5|F|7|15|8|@]|9|@]|A|$]]]|P|$Q|$5|R|S|T|A|$U|V]]]]

<pre><code>- (NSData *)applicationDataFromFile:(NSString *)fileName {
 NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
 NSString *documentsDirectory = [paths objectAtIndex:0];
 NSString *appFile = [documentsDirectory stringByAppendingPathComponent:fileName];
 NSData *myData = [[[NSData alloc] initWithContentsOfFile:appFile] autorelease];
 return myData;
}
</code></pre>

taken from <a href="http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/FilesandNetworking/FilesandNetworking.html#//apple_ref/doc/uid/TP40007072-CH21-SW21" rel="nofollow noreferrer">http://developer.apple.com/iphone/library/documentation/iPhone/Conceptual/iPhoneOSProgrammingGuide/FilesandNetworking/FilesandNetworking.html#//apple_ref/doc/uid/TP40007072-CH21-SW21</a>

Could be easily adapted if you wanted it to return a UIImage instead of an NSData.

Also, you don't say if you are saving the images to the documents directory, or adding them to your app bundle before compiling. because if it's the latter, you can use <code>[UIImage imageNamed:(NSString *)filename]</code> to get the image. It expects an extension as part of the file-name.

blocks|key|1371386|text|我发现在扩展名为".jpg“的情况下，有必要使用ofType作为应用程序在iPod+Touch上工作的扩展名，而扩展名为".png”的应用程序只需将"image.png“放在pathForResource中，然后说of+ofType:nil。但所有版本都能在模拟器上运行。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1371387|应用程序包包含图像文件，我使用的是：|1371388|[[NSBundle+mainBundle]+pathForResource:@"Auto"+ofType:@"jpg"]|code-block|syntax|javascript|1371389|获取一条路径。|1371390|entityMap^0|0|0|0|0^^$0|@$1|2|3|4|5|6|7|M|8|@]|9|@]|A|$]]|$1|B|3|C|5|6|7|N|8|@]|9|@]|A|$]]|$1|D|3|E|5|F|7|O|8|@]|9|@]|A|$G|H]]|$1|I|3|J|5|6|7|P|8|@]|9|@]|A|$]]|$1|K|3|-4|5|6|7|Q|8|@]|9|@]|A|$]]]|L|$]]

I found that with an extension of ".jpg" it was necessary to use ofType for the extension for the app to work on an iPod Touch, whereas with an extension of ".png" I could just put "image.png" in pathForResource and say ofType:nil. But all versions worked on the simulator.

The app bundle contains the image file, and I am using:

<pre><code>[[NSBundle mainBundle] pathForResource:@"Auto" ofType:@"jpg"]
</code></pre>

to get a path.

blocks|key|1156417|text|您可以轻松地使用NSBundle方法，而无需传递扩展，只需为扩展传递nil即可。|type|unstyled|depth|inlineStyleRanges|entityRanges|data|1156418|[[NSBundle+mainBundle]+pathForResource:@"image.jpg"+ofType:nil];|code-block|syntax|javascript|1156419|entityMap^0|0|0^^$0|@$1|2|3|4|5|6|7|I|8|@]|9|@]|A|$]]|$1|B|3|C|5|D|7|J|8|@]|9|@]|A|$E|F]]|$1|G|3|-4|5|6|7|K|8|@]|9|@]|A|$]]]|H|$]]

You can easily use the NSBundle method without passing the extension, just pass nil for extension.

<pre><code>[[NSBundle mainBundle] pathForResource:@"image.jpg" ofType:nil];
</code></pre>

Here is what I'm doing, when I create an image with the path in the bundle:

<pre><code>
UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image" ofType:@"jpg"]];
</code></pre>

What I want to do is trying to find the path for my image but without using the extension, without using 'ofType' (because the name of my image and her extension is store in my database) something like that:

<pre><code>
UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image.jpg"]];
</code></pre>

But I don't know how to do it.

Best regards,

pathForResource? without using extension (Iphone)

数据库

下面是我正在做的事情，当我使用包中的路径创建一个镜像时：UIImage *image = [UIImage imageWithContentsOfFile:[[NSBundle mainBundle] pathForResource:@"image" ofType:@"jpg"]];我想要做的是尝试找到我的图像的路径，...

问pathForResource？不使用扩展(Iphone)
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