Mac project by Visual Studio for Mac. The Project Navigation section allows the developer to navigate between all of the files that make up this shim Xcode project. Typically, they will only be interested in the. The Interface Hierarchy section allows the developer to easily access several key properties of the user interface such as its Placeholders and main Window. This section can be used to access the individual elements views that make up the user interface and to adjust the way they are nested by dragging them around within the hierarchy.
The Interface Editor section provides the surface on which the user interface is graphically laid out.
As user interface elements views are added to the design surface, they will be added to the Interface Hierarchy section in the order that they appear in the Interface Editor. Initially this section is almost empty, however if the developer selects an element in the Interface Editor or Interface Hierarchy , the Properties section will be populated with information about the given element and properties that they can adjust.
Within the Properties section, there are eight different Inspector Tabs , as shown in the following illustration:. Use the Library section to find controls and objects to place into the designer to graphically build the user interface:. With the basics of the Xcode IDE and Interface Builder covered, the developer can create the user interface for the main view.
Drop the label onto the Window beside the button in the Interface Editor:. Select the Button just added in the Interface Editor , and click the Constraints Editor icon at the bottom of the window:. At the top of the editor, click the Red I-Beams at the top and left. As the window is resized, this will keep the button in the same location at the top left corner of the screen. Next, check the Height and Width boxes and use the default sizes. This keeps the button at the same size when the window resizes. By clicking Red I-Beams at the top, right and left of the Constraints Editor , tells the label to be stuck to its given X and Y locations and to grow and shrink as the window is resized in the running application.
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Again, check the Height box and use the default size, then click the Add 4 Constraints button to add the constraints and close the editor. While resizing and moving controls around, notice that Interface Builder gives helpful snap hints that are based on macOS Human Interface Guidelines. These guidelines will help the developer to create high quality apps that will have a familiar look and feel for Mac users. Look in the Interface Hierarchy section to see how the layout and hierarchy of the elements that make up the user interface are shown:.
From here the developer can select items to edit or drag to reorder UI elements if needed. For example, if a UI element was being covered by another element, they could drag it to the bottom of the list to make it the top-most item on the window.
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With the user interface created, the developer will need to expose the UI items so that Xamarin. Mac can access and interact with them in C code. The next section, Outlets and Actions , shows how to do this. So what are Outlets and Actions? In traditional. The developer must explicitly expose the UI element to code. In order do this, Apple provides two options:.
In Xcode, Outlets and Actions are added directly in code via Control-dragging. More specifically, this means that to create an Outlet or Action , the developer will choose a control element to add an Outlet or Action to, hold down the Control key on the keyboard, and drag that control directly into the code. For Xamarin.
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Mac developers, this means that the developer will drag into the Objective-C stub files that correspond to the C file where they want to create the Outlet or Action. Visual Studio for Mac created a file called ViewController. This stub. Mac project when a new NSWindow is created. This file will be used to synchronize the changes made by Interface Builder and is where the Outlets and Actions are created so that UI elements are exposed to C code. With a basic understanding of what Outlets and Actions are, create an Outlet to expose the Label created to our C code.
In Xcode at the far right top-hand corner of the screen, click the Double Circle button to open the Assistant Editor:. The Xcode will switch to a split-view mode with the Interface Editor on one side and a Code Editor on the other. Notice that Xcode has automatically picked the ViewController.
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From the discussion on what Outlets and Actions are above, the developer will need to have the ViewController. The last step was very important! In the Interface Editor , hold down the Control key on the keyboard and click-drag the label created above onto the code editor just below the interface ViewController: A dialog box will be displayed. Next, expose the button to C code. Just like the Label above, the developer could wire the button up to an Outlet.
Since we only want to respond to the button being clicked, use an Action instead. With the user interface wired-up and exposed to C code, switch back to Visual Studio for Mac and let it synchronize the changes made in Xcode and Interface Builder. It probably took a long time to create the user interface and Outlets and Actions for this first app, and it may seem like a lot of work, but a lot of new concepts were introduced and a lot of time was spent covering new ground.
After practicing for a while and working with Interface Builder, this interface and all its Outlets and Actions can be created in just a minute or two. When the developer switches back to Visual Studio for Mac from Xcode, any changes that they have made in Xcode will automatically be synchronized with the Xamarin. Mac project. Select the ViewController. Visual Studio for Mac listens for changes to the.
Notice that ViewController. Un disco duro se puede borrar y escribir cientos de veces. La segunda es para el cable que lo conecta a la placa madre. Detalle interno de un HD.
Leer documento. Pregunta Javier Atencia, explica como funciona un disco duro, por dentro. Platos, cabezas lectoras, placa Las imagenes contienen un alto nivel de detalles. Por eso, de momento, no estamos recibiendo opiniones. Gracias y disculpa las molestias. El autor.
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