Uploaded November 2012 | Updated September 2026, 2 weeks ago
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By mzmuda@techytube, for more from this author visit:
techytube.com/author/mzmuda
Previously we have added a grid to our Photo Page, and now we will be placing controls in that grid.
When dropping new controls, it's important to realize that their initial configuration may not align with the design in your application. In ours too, we will be resetting some of the main properties to get the control to properly render in our grid.
In this video, I will show you how to add a Button, and a TextBlock to a Grid.
References
XAML Navigation, Layout, Views -- msdn.microsoft.com/en-us/library/windows/apps/jj215600.aspx
Subscribe to our channel here for notifications on new video trainings. For more videos on technology, visit our website at http://www.techytube.com.
By mzmuda@techytube, for more from this author visit:
techytube.com/author/mzmuda
Previously we have added a grid to our Photo Page, and now we will be placing controls in that grid.
When dropping new controls, it's important to realize that their initial configuration may not align with the design in your application. In ours too, we will be resetting some of the main properties to get the control to properly render in our grid.
In this video, I will show you how to add a Button, and a TextBlock to a Grid.
References
XAML Navigation, Layout, Views -- msdn.microsoft.com/en-us/library/windows/apps/jj215600.aspx





![Archiving and unarchiving objects in Objective-C
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By pavel@techytube, for more from this author visit:
http://www.techytube.com/author/pavel
There are situations when we want to save the state of our objects to the system, for example when our app has to go in the background, or to terminate.
Of course, we can do our way for saving our objects, but iOS SDK provides us an elegant way for doing that by using NSKeyedArchiver - to archive objects, and NSKeyedUnarchiver - to unarchive objects.
But in order for those methods to work correctly, we need to implement 2 instance methods in the class we want to be able to archive, or unarchive.
These methods are mandatary in such situations, and should look like this:
- (void)encodeWithCoder:(NSCoder *)coder
{
[coder encodeObject:somePropertyOrField forKey:@KeyName];
}
- (id)initWithCoder:(NSCoder *)coder
{
self.propertyName = [coder decodeObjectForKey:@KeyName1];
fieldName = [coder decodeObjectForKey:@KeyName2];
return self;
}
somePropertyOrField must be a property or a field of our class; @KeyName, @KeyName1 ..., @KeyNamen may be arbitrary names we choose.
To archive (save the object on the File System), we use:
[NSKeyedArchiver archiveRootObject:objectName toFile:@/Users/pavel/myObjectState.plist];
which create the .plist file (which a special XML-format file in iOS) at the indicated path.
To unarchive (restore an object state from a file), we use:
MyClass *newObjectName = [NSKeyedUnarchiver unarchiveObjectWithFile:@/Users/pavel/myObjectState.plist];
which initializes the new object with the corresponding values from the .plist file. Archiving and unarchiving objects in Objective-C](https://i.ytimg.com/vi/KSIU8zRi7zk/mqdefault.jpg)




