IOS -- 利用URL Scheme启动第三方应用

以启动Instagram为例

Custom URL Scheme

Opening instagram://, followed by one of the following parameters, will open our app and perform a custom action. For example, for camera, you would direct users on the iPhone to the custom URL instagram://camera.

URL	OPENS
app	The Instagram app
camera	The camera (or photo library on non-camera devices)
media?id=MEDIA_ID	Media with this ID
user?username=USERNAME	User with this username
location?id=LOCATION_ID	Location feed for this location ID
tag?name=TAG	Tag feed for this tag

The Objective-C call to open one of these URLs is as follows:

NSURL *instagramURL = [NSURL URLWithString:@"instagram://location?id=1"];
if ([[UIApplication sharedApplication] canOpenURL:instagramURL]) {
    [[UIApplication sharedApplication] openURL:instagramURL];
}

//开启浏览器打开某网页
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"https://instagram.com/"]];</span>

That site is handleOpenUrl.com and you can search for specific applications or even for specific types of applications

https://instagram.com/developer/mobile-sharing/iphone-hooks/#