1、[NSBundle mainBundle]，文件夹其实是Group，如左侧的树形文件管理器

Build之后，文件直接就复制到了根目录下，于是读取的方法，应该是这样：

NSString 

*earth = [[

NSBundle 

mainBundle] pathForResource:@

"Brad Cox" 

ofType:@

"png"

];

2、使用文件夹的时候，Build结果

依然使用同样的方法，不需要制定文件夹路径

//inDirectory参数可有可无

NSString *earth = [[NSBundle mainBundle] pathForResource:@"Matthijs" ofType:@"png" inDirectory:@"Images/MoreImages"]; NSString *earth = [[NSBundle mainBundle] pathForResource:@"Matthijs" ofType:@"png"];

 

编译之后，mainBundle的资源都是放到RootFolder下，所以，可以直接访问，不要指定内部路径

 

3、使用其他的Bundle

 

NSString 

*resourceBundle = [[

NSBundle 

mainBundle] pathForResource:@

"Resources" 

ofType:@

"bundle"

];

    

NSLog

(@

"resourceBundle: %@"

, resourceBundle);

    

NSString 

*earth = [[

NSBundlebundleWithPath

:resourceBundle] pathForResource:@

"Matthijs"

ofType:@

"jpg"

inDirectory:@

"Images/MoreImages"

];

 

    

NSLog

(@

"path: %@"

, earth);

使用Custom bundle，访问内部的子文件夹，需要指定inDirectory参数，这个mainBundle不同，这是为何？

注意：Since

bundles other than the main bundle can have folders embedded inside them, to access

files inside folders of a bundle other than the main bundle it is best to use the pathFor

Resource:ofType:inDirectory: method of

NSBundle 

to explicitly specify the folder in

which a specific file/resource exists.