Remove empty space before cells in UITableView

how to remove empty space before cell


a) Programmatically

Add this to i.e. viewDidLoad

self.automaticallyAdjustsScrollViewInsets = false

b) Interface Builder

• Select the view controller
• Open Attributes inspector

There's a property called "Adjust scroll view insets" in IB's attribute inspector (when a view controller is selected) which is on by default. just deselect the check box

Re call function for every 5sec in iOS swift 3

override func viewDidLoad() {

        super.viewDidLoad()

var timer = Timer.scheduledTimer(timeInterval: 5, target: self, selector: #selector(self.getdata) , userInfo: nil, repeats: true);

}

    func getdata()

    {

//this function calls for every 5 seconds 

}

get an iPhone's device name and get Ip address in swift 3

--> Use this line for getting device name

UIDevice.current.name

-----------------------------------------------------------------------------------------------------------

-->getting ipaddress

function

func getIFAddresses() -> [String] {

        var addresses = [String]()

        

        // Get list of all interfaces on the local machine:

        var ifaddr : UnsafeMutablePointer<ifaddrs>?

        guard getifaddrs(&ifaddr) == 0 else { return [] }

        guard let firstAddr = ifaddr else { return [] }

        

        // For each interface ...

        for ptr in sequence(first: firstAddr, next: { $0.pointee.ifa_next }) {

            let flags = Int32(ptr.pointee.ifa_flags)

            var addr = ptr.pointee.ifa_addr.pointee

            

            // Check for running IPv4, IPv6 interfaces. Skip the loopback interface.

            if (flags & (IFF_UP|IFF_RUNNING|IFF_LOOPBACK)) == (IFF_UP|IFF_RUNNING) {

                if addr.sa_family == UInt8(AF_INET) || addr.sa_family == UInt8(AF_INET6) {

                    

                    // Convert interface address to a human readable string:

                    var hostname = [CChar](repeating: 0, count: Int(NI_MAXHOST))

                    if (getnameinfo(&addr, socklen_t(addr.sa_len), &hostname, socklen_t(hostname.count),

                                    nil, socklen_t(0), NI_NUMERICHOST) == 0) {

                        let address = String(cString: hostname)

                        addresses.append(address)

                    }

                }

            }

        }

        

        freeifaddrs(ifaddr)

        return addresses

    }

Usage

 override func viewDidLoad() {

        super.viewDidLoad()

        let addr = getIFAddresses()

        print(addr[1])

        ipaddress=addr[1]

        

    }

note: add lines in -Bridging-Header.h file

#include <arpa/inet.h>

#include <sys/socket.h>

#include <ifaddrs.h>

Apply font awesome styles in iOS swift 3

step 1 : download font awesome ttf file 

https://github.com/FortAwesome/Font-Awesome/blob/master/fonts/fontawesome-webfont.ttf

Step 2 : copy it into project 

Step 3 : set font awesome ttf file into "info" file

Step 4: set font awsome ttf file into Build Phases --> Copy Bundle Resources

step 5 : apply font styles to button

step 6 : 

• use different type of icon codes

https://github.com/thii/FontAwesome.swift/blob/master/FontAwesome/Enum.swift

• Icon names 

http://fontawesome.io/icons/