How to convert NSDate into Unix timestamp in Objective C/iPhone? [duplicate]
I believe – [NSDate timeIntervalSince1970] is what you want. Jan 1, 1970 is the date of the Unix epoch.
cocoa-touch
Difference between NSWindowController Vs NSViewController
With iPhone SDK and Leopard SDK, they introduced view controllers, or NSViewController and UIViewController. As their names suggest what they do is to manage views The view controllers are for managing views. Current trend in UI design is Single Window, Multiple View. What it means is that there is one Window and inside of it, … Read more
How to find out what mach_msg_trap waits for?
Turn out my app is not actually spending 65% of it’s time in the mach_msg_trap function. It was a configuration error in Instruments on my part. The Sampler tool defaults to All Sample Counts, this will measure all threads regardless of their state. Instead switch to Running Sample Times that will reflect the current actual … Read more