代码打开app，并判断是否安装app

常见的app的sheme名字如下：

---

LSApplicationQueriesSchemes

wechat

weixin

sinaweibohd

sinaweibo

sinaweibosso

weibosdk

weibosdk2.5

mqqapi

mqq

mqqOpensdkSSoLogin

mqqconnect

mqqopensdkdataline

mqqopensdkgrouptribeshare

mqqopensdkfriend

mqqopensdkapi

mqqopensdkapiV2

mqqopensdkapiV3

mqzoneopensdk

wtloginmqq

wtloginmqq2

mqqwpa

mqzone

mqzonev2

mqzoneshare

wtloginqzone

mqzonewx

mqzoneopensdkapiV2

mqzoneopensdkapi19

mqzoneopensdkapi

mqzoneopensdk

alipay

alipayshare

在"Info.plist"中进行配置

代码判断是否安装app：

if(![[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"alipay://"]]) {

    NSLog(@"UnInstall alipay");

    return;

}