//Document目录  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
NSString *path = [paths objectAtIndex:0];  
 
//Cache目录  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);  
NSString *path = [paths objectAtIndex:0];  
 
//Libaray目录  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); 
NSString *path = [paths objectAtIndex:0];  
 
//tmp目录 
NSString *tmpDir = NSTemporaryDirectory();  

//Document目录  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  
NSString *path = [paths objectAtIndex:0];  
 
//Cache目录  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);  
NSString *path = [paths objectAtIndex:0];  
 
//Libaray目录  
NSArray *paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES); 
NSString *path = [paths objectAtIndex:0];  
 
//tmp目录 
NSString *tmpDir = NSTemporaryDirectory();