delete which Xcode default snippet has

add multi_if and queue_async

Author: NSDeveloper

dispatch_after.m

@@ -0,0 +1,18 @@
+// multi if
+// multi if statement
+//
+// IDECodeSnippetCompletionPrefix: ifelseif
+// IDECodeSnippetCompletionScopes: [CodeBlock]
+// IDECodeSnippetIdentifier: 89FE628B-89C5-400A-A1BE-9EEDAC4A3796
+// IDECodeSnippetLanguage: Xcode.SourceCodeLanguage.C
+// IDECodeSnippetUserSnippet: 1
+// IDECodeSnippetVersion: 2
+if (<#condition#>) {
+  <#statements-if-true#>
+}
+else if (<#condition2#>) {
+  <#statements-if-condition2-true#>
+}
+else {
+    <#statements-others#>
+}