沙盒目录操作注意

来源：互联网发布：房产中介必备软件编辑：程序博客网时间：2024/05/20 05:31

一、函数的使用注意

调用 - (BOOL)fileExistsAtPath:(NSString *)path isDirectory:(BOOL *)isDirectory;作用：1.判断一个文件是否存在   2.判断一个文件是否是目录以下是几种情况下的运行结果：1.path路径是一个目录并且存在：  函数返回值：YES     isDirectory:无论其初始值是多少，始终返回YES2.path路径是一个目录并且不存在：  函数返回值：NO      isDirectory:返回值和其初始值保持一致3.path路径是一个文件(.txt),且不存在  函数返回值：NO      isDirectory:返回值和初始值保持一致4.path路径是一个文件(.txt)，且存在  函数返回值：YES     isDirectory:无论其初始值，始终返回NO

以下是测试代码：

////  SandboxTool.m//  ////  Created by zhangqi on 17/3/2016.////#import "SandboxTool.h"@implementation SandboxTool/** *  Get documents (Documents) directory * *  @return 真机： /var/mobile/Containers/Data/Application/9FBAB5BE-B1D7-4705-8A23-9ABC78ABAE19/Documents */+ (NSString *)getDocumentDir{    return [NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES) lastObject];}/** *  Get library directory * *  @return 真机：/var/mobile/Containers/Data/Application/8515DEFD-26D2-455A-A399-9A859EE8A92A/Library */+ (NSString *)getLibrary{    return [NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES) lastObject];}/** *  Get library/cache * *  @return /var/mobile/Containers/Data/Application/F738FC55-A4C9-4858-B2BC-BEB0824FF5C0/Library/Caches */+ (NSString *)getLibraryCache{    return [NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES) lastObject];}@end- (void)createDir{    NSString *filePath = [[SandboxTool getDocumentDir] stringByAppendingPathComponent:@"qi.txt"];//    NSString *filePath = [SandboxTool getDocumentDir];    NSFileManager *fileManager = [NSFileManager defaultManager];    BOOL isdir = YES;    if ([fileManager fileExistsAtPath:filePath isDirectory:&isdir]) {        NSLog(@"函数返回值为YES");        if (isdir) {            NSLog(@"isDirectory返回YES");        }else{            NSLog(@"isDirectory返回NO");        }    }else{        NSLog(@"函数返回值为NO");       if([fileManager createFileAtPath:filePath contents:[@"nihao" dataUsingEncoding:NSUTF8StringEncoding] attributes:nil]){           NSLog(@"文件创建成功");       }else{           NSLog(@"文件创建失败");       }        if (isdir) {            NSLog(@"isDirectory返回YES");        }else{            NSLog(@"isDirectory返回NO");        }    }}

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