常用的APP间通讯场景是支付和分享。接入支付宝等支付场景时需要跳转到支付宝APP,完成支付后再将支付结果返回原来的APP,这样就涉及APP间传值。
新建App1和App2两个应用,如果我想从App1调起App2,那么我需要添加App2的URL Scheme,不同于其他手机APPs的值,用来在App1发起openUrl方法时找到手机里的App2应用。
设置App2的URL Scheme为AppTwoScheme
App1想要调起App2时只需要通过如下方法即可
NSURL *url = [NSURL URLWithString: [NSString stringWithFormat: @"AppTwoScheme://com.zy.app1/subpath?para=%i&from=%@", 1, @"app1"]];
if ([[UIApplication sharedApplication] canOpenURL: url]) {
NSLog(@"canOpenUrl");
if (@available(iOS 10, *)) {
NSDictionary *options = @{UIApplicationOpenURLOptionsSourceApplicationKey : @YES};
[[UIApplication sharedApplication] openURL: url options: options completionHandler: nil];
}else{
[[UIApplication sharedApplication] openURL: url];
}
}
从iOS 10开始,还需要在App1中添加白名单LSApplicationQueriesSchemes数组
如果只需要从App1到App2,不需要返回,这要就可以了。
在App2的AppDelegate代理方法中接收传入的值,如果使用SceneDelegate类,则在-(void)scene:(UIScene *)scene openURLContexts:(NSSet<UIOpenURLContext *> *)URLContexts
代理方法中接收。
-(BOOL)application:(UIApplication *)app openURL:(NSURL *)url options:(NSDictionary<UIApplicationOpenURLOptionsKey,id> *)options
{
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle: @"提示" message: @"收到一条从APP1传来的简讯" preferredStyle: UIAlertControllerStyleAlert];
[self.window.rootViewController presentViewController: alertVC animated: YES completion: nil];
NSLog(@"absoulteString: %@", url.absoluteString);
NSLog(@"scheme: %@", url.scheme);
NSLog(@"host: %@", url.host);
NSLog(@"path: %@", url.path);
NSLog(@"query: %@", url.query);
NSLog(@"Url参数: %@", [self getURLParameters: url.absoluteString]);
if ([url.host isEqualToString: @"com.zy.app1"]) {
//从app1跳转过来
}
return YES;
}
scheme、host和query等结果如下:
若需要将App2中的处理结果返回给App1,同样的操作:设置App1的URL Scheme为AppOneScheme,添加App2的白名单为AppOneScheme,给App2一个触发事件调用
UIAlertController *alertVC = [UIAlertController alertControllerWithTitle: @"提示" message: @"收到一条从APP1传来的简讯" preferredStyle: UIAlertControllerStyleAlert];
[alertVC addAction: [UIAlertAction actionWithTitle: @"确定" style: UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
NSURL *oneUrl = [NSURL URLWithString: [NSString stringWithFormat: @"AppOneScheme://com.zy.app2?result=1"]];
if (@available(iOS 10, *)) {
[[UIApplication sharedApplication] openURL: oneUrl options: @{} completionHandler: nil];
}else{
[[UIApplication sharedApplication] openURL: oneUrl];
}
}]];
[self.window.rootViewController presentViewController: alertVC animated: YES completion: nil];
App1接收到的返回值为
-(void)scene:(UIScene *)scene openURLContexts:(NSSet<UIOpenURLContext *> *)URLContexts
{
if (URLContexts.count > 0) {
NSEnumerator *enumerator = [URLContexts objectEnumerator];
UIOpenURLContext *urlContext = [enumerator nextObject];
NSURL *url = urlContext.URL;
NSLog(@"absoulteString: %@", url.absoluteString);
NSLog(@"scheme: %@", url.scheme);
NSLog(@"host: %@", url.host);
NSLog(@"path: %@", url.path);
NSLog(@"query: %@", url.query);
NSLog(@"Url参数: %@", [self getURLParameters: url.absoluteString]);
if ([url.host isEqualToString: @"com.zy.app2"]) {
//从app2返回的数据
}
}
}
如此,即完成了一组App间的传值。
但要注意,如果从左上角的返回按钮回到App1则无法将结果返回,因为没有调用openURL吧。
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