ios获取已安装的应用列表

URL Scheme

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。

假设有个APP注册了URL Scheme:myapp

if([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"myapp://com.yourcompany.appName"]];) {
    //YES
} else {
    //NO
}

openURL能帮助你运行Maps,SMS,Browser,Phone甚至其他的应用程序。
openURL的使用方法:
[[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:myURLString]];

自己定义URL,方法如下:
打开info.plist,添加一项URL types
展开URL types,再展开Item1,将Item1下的URL identifier修改为URL Scheme
展开URL Scheme,将Item1的内容修改为myapp

或者:(增加一下此段设置)

<key>CFBundleURLTypeskey>
    <array>
        <dict>
            <key>CFBundleURLSchemeskey>
            <array>
                <string>myappstring>
            array>
            <key>CFBundleURLNamekey>
            <string>com.yourcompany.appNamestring>
        dict>
    array>

其他程序可通过myapp://访问此自定义URL

可通过

[[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString: @"myapp://com.yourcompany.appName"]];

来判断用户机器中是否安装了该程序
最近接触到程序内打开自己,通过第三方控件来调用本身程序:

通过- (BOOL)application:(UIApplication )application handleOpenURL:(NSURL )url
可以通过处理url来获取信息扫行相应操作。

运行中得进程

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,就无法获取到

// .h

@interface UIDevice (ProcessesAdditions)
- (NSArray *)runningProcesses;
@end

// .m
#import 

@implementation UIDevice (ProcessesAdditions)

- (NSArray *)runningProcesses {

        int mib[4] = {CTL_KERN, KERN_PROC, KERN_PROC_ALL, 0};
        size_t miblen = 4;

        size_t size;
        int st = sysctl(mib, miblen, NULL, &size, NULL, 0);

        struct kinfo_proc * process = NULL;
        struct kinfo_proc * newprocess = NULL;

    do {

        size += size / 10;
        newprocess = realloc(process, size);

        if (!newprocess){

            if (process){
                free(process);
            }

            return nil;
        }

        process = newprocess;
        st = sysctl(mib, miblen, process, &size, NULL, 0);

    } while (st == -1 && errno == ENOMEM);

        if (st == 0){

                if (size % sizeof(struct kinfo_proc) == 0){
                        int nprocess = size / sizeof(struct kinfo_proc);

                        if (nprocess){

                                NSMutableArray * array = [[NSMutableArray alloc] init];

                                for (int i = nprocess - 1; i >= 0; i--){

                                        NSString * processID = [[NSString alloc] initWithFormat:@"%d", process[i].kp_proc.p_pid];
                                        NSString * processName = [[NSString alloc] initWithFormat:@"%s", process[i].kp_proc.p_comm];

                                        NSDictionary * dict = [[NSDictionary alloc] initWithObjects:[NSArray arrayWithObjects:processID, processName, nil] 
                                                                                                                                                forKeys:[NSArray arrayWithObjects:@"ProcessID", @"ProcessName", nil]];
                                        [processID release];
                                        [processName release];
                                        [array addObject:dict];
                                        [dict release];
                                }

                                free(process);
                                return [array autorelease];
                        }
                }
        }

        return nil;
}

@end

// Example usage.
NSArray * processes = [[UIDevice currentDevice] runningProcesses];
for (NSDictionary * dict in processes){
        NSLog(@"%@ - %@", [dict objectForKey:@"ProcessID"], [dict objectForKey:@"ProcessName"]);
}

私有API

最好用的就是私有API了,但是有审核不通过的风险

#include 

Class LSApplicationWorkspace_class = objc_getClass("LSApplicationWorkspace");
NSObject* workspace = [LSApplicationWorkspace_class performSelector:@selector(defaultWorkspace)];
NSLog(@"apps: %@", [workspace performSelector:@selector(allApplications)]);

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