iOS 一个程序 调起另外一个程序

A: NSURL *url = [NSURL URLWithString:@”ceshi://aaaaaaa”];

if ( [[UIApplication sharedApplication] canOpenURL:url]) { [[UIApplication sharedApplication] openURL:url]; NSLog(@"安装了"); }else{ //打开下载地址 }

B: targets–>info –>url type–>url schemes ceshi 实现代理：

- (BOOL)application:(UIApplication *)application openURL:(NSURL *)url sourceApplication:(NSString *)sourceApplication annotation:(id)annotation { NSString*text=[[url host]stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding]; NSLog(@"%@",text); return YES; }