ci: Move to hosted macOS for iOS builds

.vsts-ci.iOS.yml

@@ -2,10 +2,7 @@ jobs:
 - job: iOS
 
   pool:
-    name: Default
-    demands:
-    - Agent.OS -equals Darwin
-    - Xamarin.iOS -equals Stable
+    vmImage: macOS-10.15
 
   variables:
     - name: NUGET_PACKAGES
@@ -29,17 +26,18 @@ jobs:
       version: 3.1.3
 
   - task: InstallAppleCertificate@2
-    displayName: Install Bundle Apple Certificate
+    displayName: Install Certificate
     inputs:
-      certSecureFile: 'apple.appstore.distribution.p12'
-      certPwd: '$(appleappstorecertificatepassword)'
-      keychain: 'temp'
+      certSecureFile: apple.appstore.distribution.p12
+      certPwd: $(appleappstorecertificatepassword)
+      keychain: temp
       deleteCert: true
 
   - task: InstallAppleProvisioningProfile@1
-    displayName: 'Install an Apple provisioning profile'
+    displayName: Install Provisioning Profile
     inputs:
-      provProfileSecureFile: 'Uno_Calculator.mobileprovision'
+      provisioningProfileLocation: secureFiles
+      provProfileSecureFile: Uno_Calculator.mobileprovision
 
   - bash: |
       cd $(build.sourcesdirectory)/src/CalcManager

.vsts-ci.yml

@@ -2,4 +2,5 @@ jobs:
 - template: .vsts-ci.Windows.yml
 - template: .vsts-ci.Linux.yml
 - template: .vsts-ci.macOS.yml
+- template: .vsts-ci.iOS.yml
 - template: .vsts-ci.Skia.yml