` | theDelegate As `Object` | | |
## Property descriptions
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forsearch
iOSBlock.Handle
**Handle** As `Ptr`
Gets the Objective-C block.
This property is read-only.
## Method descriptions
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forsearch
iOSBlock.Constructor
**Constructor**(theDelegate As `Object`)
Note
`Constructors` are special methods called when you create an object with the `New` keyword and pass in the parameters above.
Used to supply the delegate to create for the block.
## Sample code
The openURL command can be called with a series of Declares, the last of which requires a Block. Here are the Declares:
``` xojo
Public Function ShowURL(url As String) as Boolean
' NSString* launchUrl = @"http://www.xojo.com/";
' [[UIApplication sharedApplication] openURL:[NSURL URLWithString: launchUrl]];
Declare Function NSClassFromString Lib "Foundation" (name As CFStringRef) As Ptr
Declare Function sharedApplication Lib "UIKit" Selector "sharedApplication" (obj As Ptr) As Ptr
Dim sharedApp As Ptr = sharedApplication(NSClassFromString("UIApplication"))
' https://developer.apple.com/library/mac/documentation/Cocoa/Reference/Foundation/Classes/NSURL_Class/#//apple_ref/occ/clm/NSURL/URLWithString:
Declare Function URLWithString Lib "Foundation" Selector "URLWithString:" ( id As Ptr, URLString As CFStringRef ) As Ptr
Dim nsURL As Ptr = URLWithString(NSClassFromString("NSURL"), url)
' https://developer.apple.com/Library/ios/documentation/UIKit/Reference/UIApplication_Class/index.html#//apple_ref/occ/instm/UIApplication/openURL:
Declare Function openURL Lib "UIKit" Selector "openURL:options:completionHandler:" (id As Ptr, nsurl As Ptr, options As Ptr, handler As Ptr) As Boolean
Dim b As New iOSBlock(AddressOf URLResult)
Return openURL(sharedApp, nsURL, Nil, b.Handle)
End Function
```
## Compatibility
iOS projects on the iOS operating system.
## See also
`Object` parent class; `Declare` command, `Ptr` data type