iOS开发中基本文件读写操作示例

Sian

不需要多解释，直接上代码说明，代码中有相关注释

1.     // Home路径
2.     NSString *homePath = NSHomeDirectory();
3.    
4.     // Caches路径
5.     NSArray *caches = NSSearchPathForDirectoriesInDomains(NSCachesDirectory, NSUserDomainMask, YES);
6.     NSString *cachesPath = [caches firstObject];
7.    
8.     // Documents路径
9.     NSArray *documents = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
10.     NSString *documentsPath = [documents firstObject];
11.    
12.     // Tmp路径
13.     NSString *tmp = NSTemporaryDirectory();
14.    
15.    
16.     // 数组读写操作
17.     NSArray *array = @[@"a",@"b"];
18.     // 1、设置文件路径
19.     NSString *arrayPath = [documentsPath stringByAppendingPathComponent:@"array.plist"];
20.     // 2、写入文件
21.     [array writeToFile:arrayPath atomically:YES];
22.     // 3、从文件获取数据
23.     NSArray *getArray = [NSArray arrayWithContentsOfFile:arrayPath];
24.     // 4、输出打印
25.     NSLog(@"%@", getArray);
27.     // 字典读写操作
28.     NSDictionary *dict = @{@"1":@"one", @"2":@"two"};
29.     NSString *dictPath = [documentsPath stringByAppendingPathComponent:@"dict.plist"];
30.     [dict writeToFile:dictPath atomically:YES];
31.     NSDictionary *getDict = [NSDictionary dictionaryWithContentsOfFile:dictPath];
32.     NSLog(@"%@", getDict);
33.    
34.     // 字符串读写操作
35.     NSString *string = @"小龙虾论坛地址：www.yusian.com";
36.     NSString *strPath = [documentsPath stringByAppendingPathComponent:@"string.txt"];
37.     [string writeToFile:strPath atomically:YES encoding:NSUTF8StringEncoding error:nil];
38.     NSString *getStr = [NSString stringWithContentsOfFile:strPath encoding:NSUTF8StringEncoding error:nil];
39.     NSLog(@"%@", getStr);
41.     // 图片读写操作
42.     UIImage *image = [UIImage imageNamed:@"001.jpg"];
43.     // 图片一般存储在Caches目录
44.     NSString *imagePath = [cachesPath stringByAppendingPathComponent:@"001.jpg"];
45.     // 图片不直接存储，需压缩成Data格式
46.     NSData *imageData = UIImageJPEGRepresentation(image, 0.1);
47.     // 写入本地沙盒
48.     [imageData writeToFile:imagePath atomically:YES];
49.     // 获取图片
50.     UIImage *getImage = [UIImage imageWithContentsOfFile:imagePath];

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常用路径及路径获取参考链接：http://www.yusian.com/bbs/thread-7978-1-1.html