URL Scheme程序之间相互调用传值
在ios程序间通信，可以通过URL Scheme，判断是否安装了另外的应用，打开特定 URL 的方式来传递参数给
另一个程序。例如：在程序A（Receiver）的Info.plist中加入你需要注册的URL Scheme，然后在你的应用程序B中
加入处理这类请求的代码，从而实现在B程序中调用A程序，判断A程序是否安装，跳到安装界面，传递参数给A程序。
具体操作如下：
在程序A中：
在Info.plist中，增加一个字段，名称为（URL Types），Xcode会自动为你创建一个必须的键：
URL Identifier，这个键的值可以赋值为一个唯一的字符串。通常是逆向的域名结构，如：me.venj.myapp。
然后在URL Types这个键下增加一个子项：(URL Schemes)，这里填入你想注册的URL Scheme的名称，
如：cloud，你可以增加多个URL Scheme。
在程序B中：
加入调用传参判断，我们可以在AppDelegate中加入一个方法，来处理这个请求
/* For iOS 4.1 and earlier */
- (BOOL)application:(UIApplication *)application handleOpenURL:(NSURL *)url {
// Handle url request.
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"URL Request"
message:[url absoluteString] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
return YES;
}
/* For iOS 4.2 and later */
- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url
sourceApplication:(NSString *)sourceApplication annotation:(id)annotation {
// Handle url request.
UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"URL Request"
message:[url absoluteString] delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alert show];
return YES;
}
也可以在其它类中添加单独的方法处理
-(void) openReceiverApp:(id)sender {
// Opens the Receiver app if installed, otherwise displays an error
UIApplication *ourApplication = [UIApplication sharedApplication];
NSString *URLEncodedText = @"传递的内容";//传递参数
/**
Url拼装形式
Url Schemes :// +传递内容。
*/
NSString *ourPath = [@"cloud://" stringByAppendingString:URLEncodedText];
NSURL *ourURL = [NSURL URLWithString:ourPath];
//判断程序A（Receiver）是否已经安装
if ([ourApplication canOpenURL:ourURL]) {//检测已经安装
//[ourApplication openURL:ourURL];//open应用A（Recevier）
UIAlertView *alertView = [[UIAlertViewalloc] initWithTitle:@"Receiver Found"message:@""delegate:nilcancelButtonTitle:@"OK"otherButtonTitles:nil];
alertView.tag = 101;
alertView.delegate = self;
[alertView show];
[alertView release];
}else {//检测未安装应用
UIAlertView *alertView = [[UIAlertViewalloc] initWithTitle:@"" message:
@"The Receiver App is not installed." delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
[alertView show];
[alertView release];
UIApplication *ourApplication = [UIApplication sharedApplication];
NSURL *ourURL = [NSURL URLWithString:
@"https://itunes.apple.com/us/app/da-yan-shi-pin/id586827887?ls=1&mt=8"];
[ourApplication openURL:ourURL];//打开下载地址页面
}
}
iOS 预定义了如下几种URL Scheme 。
Mail: mailto:frank@wwdcdemo.example.com
Tel: tel:1-408-555-5555
SMS: 1-408-555-1212
Map: http://maps.google.com/maps?q=cupertino
YouTube: http://www.youtube.com/watch?v=VIDEO_IDENTIFIER
iTunes: http://phobos.apple.com/WebObjects/MZStore.woa/wa/viewAlbum?i=156093464&id=156093462&s=143441
利用一些方法获得当前正在运行的进程信息，从进程信息中获得安装的app信息。
// ViewController.h
// OpenProcess
#import <UIKit/UIKit.h>
@interface ViewController : UIViewController
@end
@interface UIDevice (ProcessesAdditions)
- (NSArray *)runningProcesses;
@end
// ViewController.m
// OpenProcess
#import <sys/sysctl.h>
#import "ViewController.h"
@interfaceViewController ()
-(void)openProcess;
@end
@implementation ViewController
- (void)viewDidLoad {
[superviewDidLoad];
self.view.backgroundColor = [UIColorwhiteColor];
UIButton *loginbt = [UIButtonbuttonWithType:UIButtonTypeRoundedRect];
loginbt.frame = CGRectMake(40, 140, 141, 45);
[loginbt setTitle:@"开启线程" forState:UIControlStateNormal];
loginbt.tag = 900;
[loginbt addTarget:selfaction:@selector(openProcess) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:loginbt];
}
-(void)openProcess {
// NSProcessInfo *proInfo = [NSProcessInfo processInfo];
// NSLog(@"----processName----%@",[proInfo processName]); //进行名称
// NSLog(@"----processName----%d",[proInfo processIdentifier]); //进程号，系统分配给该进程的号
// NSLog(@"----processName----%d",[proInfo processorCount]); //获取cpu数目
//
// NSLog(@"------hostname-----%@",[proInfo hostName]); //进程的主机名称
//
// NSLog(@"------systemName----%@",[proInfo operatingSystemName]); //系统名称
// NSLog(@"------systemVersion-%@",[proInfo operatingSystemVersionString]); //系统版本
// NSLog(@"------system--------%d",[proInfo operatingSystem]); //操作系统代表数字
NSArray * processes = [[UIDevice currentDevice] runningProcesses];
for (NSDictionary * dict in processes){
//输出正在进程中的应用
NSLog(@"%@ - %@", [dict objectForKey:@"ProcessID"], [dict objectForKey:@"ProcessName"]);
}
}
- (void)didReceiveMemoryWarning{
[superdidReceiveMemoryWarning];
// Dispose of any resources that can be recreated.
}
@end
@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);
}
returnnil;
}
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 = [[NSMutableArrayalloc] init];
for (int i = nprocess - 1; i >= 0; i--){
NSString * processID = [[NSStringalloc] 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];
}
}
}
returnnil;
}
@end
参考
http://blog.csdn.net/kudy21/article/details/7803216
http://forrst.com/posts/UIDevice_Category_For_Processes-h1H
http://www.cocoachina.com/newbie/tutorial/2012/0529/4302.html
