Interface Builder - Design

Design

Interface Builder provides palettes, or collections, of user interface objects to an Objective-C developer. These user interface objects contain items like text fields, data tables, sliders, and pop-up menus. Interface Builder's palettes are completely extensible, meaning any developer can develop new objects and add palettes to Interface Builder.

To build an interface, a developer simply drags interface objects from the palette onto a window or menu. Actions (messages) which the objects can emit are connected to targets in the application's code and outlets (pointers) declared in the application's code are connected to specific objects. In this way all initialization is done before runtime, both improving performance and streamlining the development process.

Interface Builder saves an application's interface as a bundle that contains the interface objects and relationships used in the application. These objects are archived (a process also known as serialization or marshalling in other contexts) into either an XML file or a NeXT-style property list file with a .nib extension. Upon running an application, the proper NIB objects are unarchived, connected into the binary of their owning application, and awakened. Unlike almost all other GUI designer systems which generate code to construct the UI (notable exceptions being Glade, Embarcadero Technologies's Delphi and C++ Builder, which stream UI objects similarly), NIBs are often referred to as freeze dried because they contain the archived objects themselves, ready to run. As of Interface Builder version 3, a new file format (with extension .xib) has been added, which is functionally identical to .nib, except it is stored in a flat file, making it more suitable for storage in revision control systems and processing by tools such as diff.

Read more about this topic:  Interface Builder

Famous quotes containing the word design:

    With wonderful art he grinds into paint for his picture all his moods and experiences, so that all his forces may be brought to the encounter. Apparently writing without a particular design or responsibility, setting down his soliloquies from time to time, taking advantage of all his humors, when at length the hour comes to declare himself, he puts down in plain English, without quotation marks, what he, Thomas Carlyle, is ready to defend in the face of the world.
    Henry David Thoreau (1817–1862)

    I always consider the settlement of America with reverence and wonder, as the opening of a grand scene and design in providence, for the illumination of the ignorant and the emancipation of the slavish part of mankind all over the earth.
    John Adams (1735–1826)

    I begin with a design for a hearse.
    For Christ’s sake not black—
    nor white either—and not polished!
    Let it be weathered—like a farm wagon—
    William Carlos Williams (1883–1963)