随记（二）－－是否能打开手机某个应用

NSLog(@"%d",[[UIApplication sharedApplication]canOpenURL:[NSURL URLWithString:@"baidumap://map/"]]);
 
        if ([[UIApplication sharedApplication] canOpenURL:[NSURL URLWithString:@"baidumap:"]]){
            NSString *urlString = [NSString stringWithFormat:@"baidumap://map/direction?origin=latlng:%f,%f|name:我的位置&destination=latlng:%f,%f|name:%@&mode=transit",
                                   _startCoor.latitude, _startCoor.longitude, _endCoor.latitude, _endCoor.longitude, _title.text];
            
            urlString = [urlString stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];
            NSURL *url = [NSURL URLWithString:urlString];

            [[UIApplication sharedApplication] openURL:url];
        } else {
            UIAlertController *appContro = [UIAlertController alertControllerWithTitle:@"提示" message:@"您是否立即前往APPStore安装!" preferredStyle:UIAlertControllerStyleAlert];
            UIAlertAction *cancel = [UIAlertAction actionWithTitle:@"稍后安装" style:UIAlertActionStyleDefault handler:nil];
            UIAlertAction *download = [UIAlertAction actionWithTitle:@"立即安装" style:UIAlertActionStyleDefault handler:^(UIAlertAction * _Nonnull action) {
                NSString *appStr = [NSString stringWithFormat:@"https://appsto.re/cn/ce98A.i"];
                [[UIApplication sharedApplication] openURL:[NSURL URLWithString:appStr]];
            }];
            [appContro addAction:download];
            [appContro addAction:cancel];
            
            [self presentViewController:appContro animated:YES completion:nil];
        }
    }];

 NSLog(@"%d",[[UIApplication sharedApplication]canOpenURL:[NSURL URLWithString:@"baidumap://map/"]]); 

开始这行不管手机上是否安装le百度地图应用，返回结果都会是NO；因项目中对该链接是不信任的，从而导致canOpenURL返回都是NO；

打开info.plist 添加LSApplicationQueriesSchemes