沙盒

#import <Foundation/Foundation.h>

@interface SandBoxHelper : NSObject

+ (NSString *)homePath;             // 程序主目录，可见子目录(3个):Documents、Library、tmp

+ (NSString *)appPath;              // 程序目录，不能存任何东西

+ (NSString *)docPath;              // 文档目录，需要ITUNES同步备份的数据存这里，可存放用户数据

+ (NSString *)libPrefPath;          // 配置目录，配置文件存这里

+ (NSString *)libCachePath;         // 缓存目录，系统永远不会删除这里的文件，ITUNES会删除

+ (NSString *)tmpPath;              // 临时缓存目录，APP退出后，系统可能会删除这里的内容

+ (NSString *)iapReceiptPath;       //用于存储iap内购返回的购买凭证

@end

#import "SandBoxHelper.h"

@implementation SandBoxHelper

+ (NSString *)homePath {
    return NSHomeDirectory();
}

+ (NSString *)appPath {
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSApplicationDirectory, NSUserDomainMask, YES);
    return [paths objectAtIndex:0];
}

+ (NSString *)docPath {
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    return [paths objectAtIndex:0];
}

+ (NSString *)libPrefPath {
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
    return [[paths objectAtIndex:0] stringByAppendingFormat:@"/Preferences"];
}

+ (NSString *)libCachePath {
    NSArray * paths = NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES);
    return [[paths objectAtIndex:0] stringByAppendingFormat:@"/Caches"];
}

+ (NSString *)tmpPath {
    return [NSHomeDirectory() stringByAppendingFormat:@"/tmp"];
}

+ (NSString *)iapReceiptPath {
    NSString *path = [[self libPrefPath] stringByAppendingFormat:@"/EACEF35FE363A75A"];
    [self hasLive:path];
    return path;
}

+ (BOOL)hasLive:(NSString *)path {
    if ( NO == [[NSFileManager defaultManager] fileExistsAtPath:path] ) {
        return [[NSFileManager defaultManager] createDirectoryAtPath:path
                                         withIntermediateDirectories:YES
                                                          attributes:nil
                                                               error:NULL];
    }
    return YES;
}

@end