NEW! Master Swift design patterns with my latest book! >>

How to add conditions to a breakpoint

Paul Hudson       @twostraws

When you place a regular breakpoint on a line of code, Xcode will pause at that point when it’s reached. However, sometimes you need something a little more fine-grained: perhaps you want the breakpoint to be ignored the first few times it’s hit, or perhaps you want execution to be paused only when a certain condition is true.

Xcode has conditional breakpoints just for this purpose: when you place a breakpoint you can right-click on it and choose “Edit Breakpoint” to see customization options. Try changing the Ignore value from 0 to 10, which will make the line hit repeatedly until finally execution pauses; or try adding a condition inside the Condition field – myVar == 10 for example, which will pause only when myVar equals 10.

Conditional breakpoints look slightly different from regular breakpoints – look for the white arrow tip inside the main blue breakpoint arrow.

Available from iOS

Did this solution work for you? Please pass it on!

Other people are reading…

About the Swift Knowledge Base

This is part of the Swift Knowledge Base, a free, searchable collection of solutions for common iOS questions.

Download for free!

Want a free 75-minute video teaching functional programming, protocol-oriented programming, and more? This is your lucky day!

MASTER SWIFT NOW
Buy Practical iOS 12 Buy Pro Swift Buy Swift Design Patterns Buy Practical iOS 11 Buy Swift Coding Challenges Buy Server-Side Swift (Vapor Edition) Buy Server-Side Swift (Kitura Edition) Buy Hacking with macOS Buy Advanced iOS Volume One Buy Hacking with watchOS Buy Hacking with tvOS Buy Hacking with Swift Buy Dive Into SpriteKit Buy Swift in Sixty Seconds Buy Objective-C for Swift Developers Buy Beyond Code

Was this page useful? Let me know!

Click here to visit the Hacking with Swift store >>