objective-c - 如何从具有特定名称的捆绑包中提取图像并添加到数组中，

Question

在我的应用程序包中，我有几个项目的几个图像。

ItemA_largepicture.png

ItemA_smallPicture.png

ItemA_overViewPicture.png

ItemB_largepicture.png

ItemB_smallPicture.png

ItemB_overViewPicture.png

ItemC_largepicture.png

ItemC_smallPicture.png

ItemC_overViewPicture.png

...

我想提取，例如所有 ItemB 图片，以显示在 scrollView 中。我可以通过以下操作轻松获得

    path=[ItemB stringByAppendingString:@"_largePicture];
    NSString *imagePath=[[NSBundle mainBundle]pathForResource:path ofType:@"png"];
    UIImage *image=[UIImage imageWithContentsOfFile:imagePath];
    [self.image setImage:image];

所以问题很简单；如何获取所有 ItemB 图片？我需要将它们放入数组中吗？我该怎么做？

Answer 1

largePicturePath=[ItemB stringByAppendingString:@"_largePicture];
smallPicturePath=[ItemB stringByAppendingString:@"_smallPicture];
overViewPicturePath=[ItemB stringByAppendingString:@"_overViewPicture];
NSString *largeImagePath=[[NSBundle mainBundle]pathForResource:largePicturePath ofType:@"png"];
NSString *smallImagePath=[[NSBundle mainBundle]pathForResource:smallPicturePath ofType:@"png"];
NSString *overViewImagePath=[[NSBundle mainBundle]pathForResource:overViewPicturePath ofType:@"png"];

NSArray *imageArray = [[NSArray arrayWithObjects:largeImagePath,smallImagePath,overViewImagePath,nil];

NSEnumerator *e = [imageArray objectEnumerator];

NSString *path;
while (path= [e nextObject]) {
    UIImage *image=[UIImage imageWithContentsOfFile:path];

    ...

}

Answer 2

此代码应列出您的 mainBundle 中的所有内容

NSString *bundleRootPath = [[NSBundle mainBundle] bundlePath];
NSArray *bundleRootContents = [[NSFileManager defaultManager] contentsOfDirectoryAtPath:bundleRootPath error:nil];
NSArray *files = [bundleRootContents filteredArrayUsingPredicate:[NSPredicate predicateWithFormat:@"self beginswith 'ItemA' OR self beginswith 'ItemB' OR self beginswith 'ItemC'"]]; //you can provide your string in ' ' to filter specific content
NSLog(@"%@",files);