Change ios Frame Size(width e height) keeping position (x,y)

Here’s how to do it with just one line of code:

myview.frame = CGRectMake(23, 50, myview.frame.size.width, myview.frame.size.height);

or

[myview setFrame:CGRectMake(23, 50, myview.frame.size.width, myview.frame.size.height)];