获取IOS应用安装列表

当两天没事儿，突然想起这么一个命题：获取IOS应用安装列表。

研究来研究去最后也没有得出个所以然来。这不今天上网，发现这篇儿文章。晾这说有三种方法。也就顺便总结一下，边转载边补充。

ok,说是三种方法，靠谱的两种:

1.openURL

我们知道可以给应用设置URL Scheme，这样别的应用就可以通过这个地址打开咱们的应用。其实还有一个api叫canOpenURL.这样如果咱们知道要检查的IOS应用列表的URL Scheme的话，就可以用canOpenURL检查一下。

2.获取运行程序列表

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1. 1. 
      
2. </pre><pre name="code" class="html">// .h
3. 
   
4. @interface UIDevice (ProcessesAdditions)
5. - (NSArray *)runningProcesses;
6. @end
7. 
   
8. // .m
9. #import <sys/sysctl.h>
10. 
    
11. @implementation UIDevice (ProcessesAdditions)
12. 
    
13. - (NSArray *)runningProcesses {
14. 
    
15. int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0};
16. size_t miblen = 4;
17. 
    
18. size_t size;
19. int st = sysctl(mib, miblen, NULL, &size, NULL, 0);
20. 
    
21. struct kinfo_proc * process = NULL;
22. struct kinfo_proc * newprocess = NULL;
23. 
    
24. do {
25. 
    
26. size += size / 10;
27. newprocess = realloc(process, size);
28. 
    
29. if (!newprocess){
30. 
    
31. if (process){
32. free(process);
33. }
34. 
    
35. return nil;
36. }
37. 
    
38. process = newprocess;
39. st = sysctl(mib, miblen, process, &size, NULL, 0);
40. 
    
41. } while (st == -1 && errno == ENOMEM);
42. 
    
43. if (st == 0){
44. 
    
45. if (size % sizeof(struct kinfo_proc) == 0){
46. int nprocess = size / sizeof(struct kinfo_proc);
47. 
    
48. if (nprocess){
49. 
    
50. NSMutableArray * array = [[NSMutableArray alloc] init];
51. 
    
52. for (int i = nprocess - 1; i >= 0; i--){
53. 
    
54. NSString * processID = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_pid];
55. NSString * processName = [[NSString alloc] initWithFormat:@"%s", process[i].kp_proc.p_comm];
56. 
    
57. NSDictionary * dict = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:processID, processName, nil]
58. forKeys:[NSArray arrayWithObjects:@"ProcessID", @"ProcessName", nil]];
59. [processID release];
60. [processName release];
61. [array addObject:dict];
62. [dict release];
63. }
64. 
    
65. free(process);
66. return [array autorelease];
67. }
68. }
69. }
70. 
    
71. return nil;
72. }
73. 
    
74. @end
75. 
    
76. // Example usage.
77. NSArray * processes = [[UIDevice currentDevice] runningProcesses];
78. for (NSDictionary * dict in processes){
79. NSLog(@"%@ - %@", [dict objectForKey:@"ProcessID"], [dict objectForKey:@"ProcessName"]);
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这种方法是获取运行中的应用列表。如果应用没被运行过或不在后台，就得不到喽。

比起上面两个方法要靠谱一点儿的就是私有API了。

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1. 1. 
      
2. BOOL APCheckIfAppInstalled(NSString *bundleIdentifier){
3. static NSString *const cacheFileName = @"com.apple.mobile.installation.plist";
4. NSString *relativeCachePath = [[@"Library" stringByAppendingPathComponent: @"Caches"] stringByAppendingPathComponent: cacheFileName];
5. NSDictionary *cacheDict = nil;
6. NSString *path = nil;
7. NSLog(@"relativeCachePath:%@",relativeCachePath);
8. // Loop through all possible paths the cache could be in
9. for (short i = 0; 1; i++) {
10. switch (i) {
11. case 0: // Jailbroken apps will find the cache here; their home directory is /var/mobile
12. path = [NSHomeDirectory() stringByAppendingPathComponent: relativeCachePath];
13. break;
14. case 1: // App Store apps and Simulator will find the cache here; home (/var/mobile/) is 2 directories above sandbox folder
15. path = [[NSHomeDirectory() stringByAppendingPathComponent: @"../.."] stringByAppendingPathComponent: relativeCachePath];
16. break;
17. case 2: // If the app is anywhere else, default to hardcoded /var/mobile/
18. path = [@"/var/mobile" stringByAppendingPathComponent: relativeCachePath];
19. break;
20. default: // Cache not found (loop not broken)
21. return NO;
22. break;
23. }
24. BOOL isDir = NO;
25. NSLog(@"path:%@",path);
26. // Ensure that file exists
27. if ([[NSFileManager defaultManager] fileExistsAtPath:path isDirectory:&isDir] && !isDir){
28. cacheDict = [NSDictionary dictionaryWithContentsOfFile: path];
29. }
30. 
    
31. // If cache is loaded, then break the loop. If the loop is not "broken," it will return NO later (default: case)
32. if (cacheDict){
33. NSLog(@"cacheDict:%@",cacheDict);
34. break;
35. }
36. 
    
37. }
38. 
    
39. NSLog(@"gggg");
40. // First check all system (jailbroken) apps
41. NSDictionary *system = [cacheDict objectForKey: @"System"];
42. NSLog(@"system:%@",system);
43. if ([system objectForKey: bundleIdentifier]){
44. return YES;
45. }
46. 
    
47. // Then all the user (App Store /var/mobile/Applications) apps
48. NSDictionary *user = [cacheDict objectForKey: @"User"];
49. NSLog(@"user:%@",user);
50. if ([user objectForKey: bundleIdentifier]){
51. return YES;
52. }
53. 
    
54. // If nothing returned YES already, we'll return NO now
55. return NO;
56. }
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不过这种方法需要机器已经越狱，还需要你的应用不在沙盒里，由于后一条笔者还不大会搞，所以没试成功:)