1 //清除缓存按钮的点击事件
2
3 - (void)putBufferBtnClicked:(UIButton *)btn{
4
5 CGFloat size = [self folderSizeAtPath:NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).lastObject] + [self folderSizeAtPath:NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).lastObject] + [self folderSizeAtPath:NSTemporaryDirectory()];
6
7
8
9 NSString *message = size > 1 ? [NSString stringWithFormat:@"缓存%.2fM, 删除缓存", size] : [NSString stringWithFormat:@"缓存%.2fK, 删除缓存", size * 1024.0];
10
11
12
13 UIAlertController *alert = [UIAlertController alertControllerWithTitle:nil message:message preferredStyle:(UIAlertControllerStyleAlert)];
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15
16
17 UIAlertAction *action = [UIAlertAction actionWithTitle:@"确定" style:(UIAlertActionStyleDefault) handler:^(UIAlertAction *action) { [self cleanCaches]; }];
18
19
20
21 UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"取消" style:(UIAlertActionStyleCancel) handler:nil];
22
23 [alert addAction:action];
24
25 [alert addAction:cancel];
26
27 [self showDetailViewController:alert sender:nil];
28
29 }
30
31
32
33 // 计算目录大小
34
35 - (CGFloat)folderSizeAtPath:(NSString *)path{
36
37 // 利用NSFileManager实现对文件的管理
38
39 NSFileManager *manager = [NSFileManager defaultManager];
40
41 CGFloat size = 0;
42
43 if ([manager fileExistsAtPath:path]) {
44
45 // 获取该目录下的文件，计算其大小
46
47 NSArray *childrenFile = [manager subpathsAtPath:path];
48
49 for (NSString *fileName in childrenFile) {
50
51 NSString *absolutePath = [path stringByAppendingPathComponent:fileName];
52
53 size += [manager attributesOfItemAtPath:absolutePath error:nil].fileSize;
54
55 }
56
57 // 将大小转化为M
58
59 return size / 1024.0 / 1024.0;
60
61 }
62
63 return 0;
64
65 }
66
67 // 根据路径删除文件
68
69 - (void)cleanCaches:(NSString *)path{
70
71 // 利用NSFileManager实现对文件的管理
72
73 NSFileManager *fileManager = [NSFileManager defaultManager];
74
75 if ([fileManager fileExistsAtPath:path]) {
76
77 // 获取该路径下面的文件名
78
79 NSArray *childrenFiles = [fileManager subpathsAtPath:path];
80
81 for (NSString *fileName in childrenFiles) {
82
83 // 拼接路径
84
85 NSString *absolutePath = [path stringByAppendingPathComponent:fileName];
86
87 // 将文件删除
88
89 [fileManager removeItemAtPath:absolutePath error:nil];
90
91 }
92
93 }
94
95 }
96
97 //计算沙盒中文件的大小并删除沙盒中文件的例子：
98
99 - (void)cleanCaches{
100
101 [self cleanCaches:NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES).firstObject];
102
103 [self cleanCaches:NSSearchPathForDirectoriesInDomains(NSLibraryDirectory, NSUserDomainMask, YES).firstObject];
104
105 [self cleanCaches:NSTemporaryDirectory()];
106
107 }
108
109
