(iPhone/iPad)計算緩存文件大小

(iPhone/iPad)計算緩存文件大小:

1. FileSize.h
2. //
3. // FileSize.h
4. //
5. //
7. #import <Cocoa/Cocoa.h>
10. @interface FileSize : NSObject {
12. }
13. // This method converts a given # of bytes into human readable format (KB, MB, GB)
14. - (NSString *)stringFromFileSize:(int)theSize;
15. // Returns the size of a file in bytes
16. - (int)sizeOfFile:(NSString *)path;
17. // Returns the size of a folder in bytes
18. - (int)sizeOfFolder:(NSString *)path;
19. @end
21. FileSize.m
23. // FileSize.m
24. // Created by PCWiz on 30/07/09.
26. #import "FileSize.h"
29. @implementation FileSize
30. - (NSString *)stringFromFileSize:(int)theSize
31. {
32. float floatSize = theSize;
33. if (theSize<1023)
34. return([NSString stringWithFormat:@"%i bytes",theSize]);
35. floatSize = floatSize / 1024;
36. if (floatSize<1023)
37. return([NSString stringWithFormat:@"%1.1f KB",floatSize]);
38. floatSize = floatSize / 1024;
39. if (floatSize<1023)
40. return([NSString stringWithFormat:@"%1.1f MB",floatSize]);
41. floatSize = floatSize / 1024;
43. return([NSString stringWithFormat:@"%1.1f GB",floatSize]);
44. }
46. - (int)sizeOfFile:(NSString *)path
47. {
48. NSDictionary *fattrib = [[NSFileManager defaultManager] fileAttributesAtPath:path traverseLink:YES];
49. int fileSize = (int)[fattrib fileSize];
50. return fileSize;
51. }
53. - (int)sizeOfFolder:(NSString*)folderPath
54. {
55. NSArray *contents;
56. NSEnumerator *enumerator;
57. NSString *path;
58. contents = [[NSFileManager defaultManager] subpathsAtPath:folderPath];
59. enumerator = [contents objectEnumerator];
60. int fileSizeInt = 0;
61. while (path = [enumerator nextObject]) {
62. NSDictionary *fattrib = [[NSFileManager defaultManager] fileAttributesAtPath:[folderPath stringByAppendingPathComponent:path] traverseLink:YES];
63. fileSizeInt +=[fattrib fileSize];
64. }
65. return fileSizeInt;
66. }
67. @end