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5 Common Swift UI Mistakes to Avoid for Optimum App Performance

SwiftUI is one of the most common frameworks for iPhone app development. If you decide to hire iOS developer and ask them about their preference, more than 90% of them will prefer working with SwiftUI due to its enhanced capabilities.

I have been working in the field of iOS app development for the past few years. Being a developer, I know that there is hardly any iOS app development agency that doesn’t give preference to SwiftUI over other tools available for iPhone app development.

Today I will share some common mistakes that your iOS developer can make while developing your app. Ensure to keep a watch to avoid them. It will help your app can perform well while representing your business among consumer groups.

Few of these mistakes are due to simple misunderstandings while carrying out the development, while some are related to enhanced development undertakings. Let’s break the ice and start our discussion.

SwiftUI mistakes you may face even when you hire iOS developer

  • Unnecessary use of views and modifiers

Writing excessive Swift code even when it is not required is one of the common mistakes that your iOS app development agency can make while building your app. The problem is quite persistent with the developers who have experience with other user interfaces or UIKit.

For example, most developers will write the code Rectangle().fill(Color. blue) to fill the screen with a blue rectangle. Though it will work for you, this can be done using much shorter code. Instead of writing this, you can write only Color. red because in SwiftUI, you can use colors and shapes directly as views as they automatically conform to the view protocol.

  • Confusing the @StateObject with @ObservedObject

@State, @StateObject, and @ObservedObject are three of the most vital property wrappers used in SwiftUI. They help to build data responsive user interfaces. Developers often make mistakes while choosing when to use these wrappers, thus leading to complications and performance issues in your iOS apps.

Though the use of @State is easy and should not be a concern, the other two wrappers can cause confusions that lead to wrong categorizations. When you hire an iOS developer to develop your apps using SwiftUI, he needs to understand that @State and @StateObject mean that the view owns the data. Whereas, in other cases, it doesn’t own the data, and it can be destroyed at any instance.

  • Putting modifiers in the wrong order

The order of the Modifiers plays a significant role in the performance of your applications. When you hire an iOS development expert, they need to understand that modifiers help for a specific type of view. Apart from it, the modifier is relevant only as long as we are working on a particular View directly.

If you ignore paying attention to the appropriate use of modifiers, your app will behave poorly, thus causing performance issues in the real world. It is also important to note that different modifiers will behave differently. So choosing the right one can help you get satisfactory results while using SwiftUI for iOS app development.

  • Confusing stroking shapes with stroking borders

It is one of the most common mistakes that your iOS app development agency can make while using the SwiftUI. Developers face confusions while stroking the borders of large shapes. It generally happens due to a lack of understanding of the difference between stroking shapes and stroking borders.

For example, when you stroke the shape, it may cause your shape to hang off the screen. It is because the stroke modifier will center its strokes on the shape edge. On the other hand, if you choose to use the stroke border, it will draw the entire stroke inside the shape, thus preventing it from becoming larger than the frame of the shape.

Bonus Reads: Mobile App Development Solutions 2022

  • Using invalid ranges while creating dynamic views

Many SwiftUI initializers allow you to create views easily by passing a variety of ranges. Still developers often face problems due to the use of invalid ranges. While the old-school ways to add ranges might work for you, you are going to face problems while making the changes to ranges in runtime.

You may experience continuous errors that prevent the particular function from working appropriately. You can fix it by choosing an identifiable protocol or specific id parameter. It will make it clear that the range will change with time. It is essential to ensure that button you are about to add will work as expected.


These were five of the most common mistakes to avoid while working on an app development project using SwiftUI. Whether you hire iOS developer or an iOS app development agency, falling for these common mistakes is common. Take extra precautions for them to ensure that your app can fulfill your needs without encountering any technical glitches.

Hitesh Chauhan

Hitesh Chauhan is a compelling content author who works with the prominent Mobile App Development Company, The Brihaspati Infotech. He has an attentive mindset and definite interests in advanced technologies and marketing tactics that encourage him in writing content that readers greet. His eagerness towards multiple heads makes his pieces more audible and engaging.

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