Pro Design Patterns in Swift by Adam Freeman

By Adam Freeman

The rapid programming language has remodeled the area of iOS improvement and began a brand new age of recent improvement. seasoned layout styles in fast indicates you ways to harness the ability and suppleness of rapid to use an important and enduring layout styles in your purposes, taking your improvement initiatives to grasp level.
This e-book will educate you these layout styles that experience continually been current at a few point on your code, yet won't were well-known, said, or absolutely applied. Implementation of particular development ways will turn out their price to any quick developer.

Best-selling writer Adam Freeman explains tips to get the main from layout styles. He starts off with the nuts-and-bolts and exhibits you every little thing via to complicated positive aspects, going in-depth to offer you the data you need.

Pro layout styles in quick brings layout styles to lifestyles and indicates you ways to convey constitution and scale in your speedy code with a realistic, no-nonsense technique.

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1)"); ... 1 refers to the value at index 1 in the tuple passed as the argument to the writeProductDetails function. Tuple indexes are zero-based, which means that this expression evaluates to A boat for one person. I used the NSString class to format the price of the product in the playground. Swift makes it easy to work with the different Cocoa frameworks, including the Foundation framework that provides core features such as string formatting. CHAPTER 3: Creating the SportsStore App 31 To see the effect of the code in the playground, select Assistant Editor ° Show Assistant Editor from the View menu.

The dotted blue lines in the figure are layout guides that Xcode provides to help position components. Figure 3-13. Positioning the first label in the custom table cell Tip You can drag the labels directly to the layout in the main part of the editor pane, but it is easy to add components to the wrong part of the layout. I find using the hierarchy to be more reliable, especially for complex layouts. Ensure that the text field is selected, either in the main editor pane or in the component hierarchy, and use the Attributes Inspector to set the values shown in Table 3-3.

Figure 3-18. The finished unstructured SportsStore application CHAPTER 3: Creating the SportsStore App 51 The user is presented with a list of products and can use the Stepper and Text Field components to change the stock level for each of them. The total number of stock items is displayed at the bottom of the screen. This application is undeniably basic, but it has allowed me to demonstrate the Xcode techniques required for this book and provides an example to which I can apply different patterns in addition to showing you fragments of code.

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