/Swift/Ios swift create new background thread

Ios swift create new background thread

extension DispatchQueue {

    static func background(delay: Double = 0.0, background: (()->Void)? = nil, completion: (() -> Void)? = nil) {
        DispatchQueue.global(qos: .background).async {
            background?()
            if let completion = completion {
                DispatchQueue.main.asyncAfter(deadline: .now() + delay, execute: {
                    completion()
                })
            }
        }
    }
}

// USAGE 

DispatchQueue.background(delay: 3.0, background: {
    // do something in background
}, completion: {
    // when background job finishes, wait 3 seconds and do something in main thread
})

DispatchQueue.background(background: {
    // do something in background
}, completion:{
    // when background job finished, do something in main thread
})

DispatchQueue.background(delay: 3.0, completion:{
    // do something in main thread after 3 seconds
})

Source: stackoverflow.com

Similar codes

0 vote378 views1 answer
Swift paged scrollview get current page
Swift
0 vote419 views1 answer
Type String and int swift addition
Swift
0 vote377 views1 answer
Sprite kitYourNextScene
Swift
0 vote369 views1 answer
Setting a local notification at specific time every day swift
Swift
0 vote316 views1 answer
Imageview resize image to fit swift
Swift
1 vote367 views1 answer
Xcode label rotate text
Swift
0 vote352 views1 answer
Print 1 line swift
Swift
1 vote334 views1 answer
Optional function parameter swift
Swift
0 vote429 views1 answer
Regular expression for number less than 100
Swift
0 vote363 views1 answer
Swift string pad
Swift