This item was deprecated in version 2021r3. Please use ObjCBlock as a replacement.
Used when callings declares that require Obj-C blocks. An iOSBlock is created from a Delegate and in turn creates an Objective-C block that will call into the delegate. This Objective-C block is retrieved from the Handle property and passed into declares.
Handle As Ptr
Gets the Objective-C block.
This property is read-only.
Constructor(theDelegate As Object)
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.
The openURL command can be called with a series of Declares, the last of which requires a Block. Here are the Declares:
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
iOS projects on the iOS operating system.