获取文件路径

#import "NSString+WJ.h"

@implementation NSString (WJ)

- (instancetype)cacheDir
{
    //1.获取Caches目录
    NSString *path = [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];
    
    //2.生成绝对路径
    
    return [path stringByAppendingPathComponent:[self lastPathComponent]];

}

-(instancetype)docDir
{
    
    NSString *path = [NSSearchPathForDirectoriesInDomains(NSDocumentationDirectory, NSUserDomainMask, YES) lastObject];
    
    return [path stringByAppendingPathComponent:[self lastPathComponent]];
}


- (instancetype)tmpDir
{
    NSString *path = NSTemporaryDirectory();
    
    return [path stringByAppendingPathComponent:[self lastPathComponent]];

}

@end

获取文件路径

原文：http://my.oschina.net/codebywj/blog/524642