我的程序有两个控制器，CallerTableViewController，FunctionViewController
调用方位于CallerTableViewController中，函数位于FunctionViewController中
现在屏幕显示的是FunctionViewController，当调用程序在CallerTableViewController中时，调用程序应该调用FunctionViewController中的函数
如何调用屏幕上显示的函数？
更新：
这是实际的程序
import UIKit
import CoreBluetooth
class TableViewController: UITableViewController,
CBCentralManagerDelegate,
CBPeripheralDelegate {
var centralManager:CBCentralManager!
var connectingPeripheral:CBPeripheral!
var bleDeviceName = [String]()
var bleDevice=[CBPeripheral]()
override func viewDidLoad() {
super.viewDidLoad()
let centralManager = CBCentralManager(delegate: self, queue: nil)
centralManager.scanForPeripherals(withServices: nil, options: nil)
self.centralManager = centralManager;
}
override func didReceiveMemoryWarning() {
super.didReceiveMemoryWarning()
}
// MARK: - Table view data source
override func numberOfSections(in tableView: UITableView) -> Int {
return 1
}
override func tableView(_ tableView: UITableView, numberOfRowsInSection section: Int) -> Int {
return bleDevice.count
}
override func tableView(_ tableView: UITableView, cellForRowAt indexPath: IndexPath) -> UITableViewCell {
let cell = tableView.dequeueReusableCell(withIdentifier: "oneCell", for: indexPath)
cell.textLabel?.text = bleDeviceName[indexPath.row]
return cell
}
override func tableView(_ tableView: UITableView, didSelectRowAt indexPath: IndexPath){
var peripheral=bleDevice[indexPath.row]
self.centralManager.stopScan()
connectingPeripheral = peripheral
connectingPeripheral.delegate = self
centralManager.connect(connectingPeripheral, options: nil)
}
required init?(coder aDecoder: NSCoder) {
super.init(coder: aDecoder)
centralManager = CBCentralManager(delegate: self, queue: DispatchQueue.main)
}
func centralManagerDidUpdateState(_ central: CBCentralManager) {
print("--- centralManagerDidUpdateState")
switch central.state{
case .poweredOn:
let serviceUUIDs:[AnyObject] = [CBUUID(string: "1111")]
let lastPeripherals = centralManager.retrieveConnectedPeripherals(withServices: serviceUUIDs as! [CBUUID])
print(lastPeripherals.count)
if lastPeripherals.count > 0{
print("count>0")
let device = lastPeripherals.last! as CBPeripheral;
connectingPeripheral = device;
centralManager.connect(connectingPeripheral, options: nil)
}
else {
centralManager.scanForPeripherals(withServices:nil, options: nil)
}
case .poweredOff:
print("--- central state is powered off")
case .resetting:
print("--- central state is resetting")
case .unauthorized:
print("--- central state is unauthorized")
case .unknown:
print("--- central state is unknown")
case .unsupported:
print("--- central state is unsupported")
}
}
func centralManager(_ central: CBCentralManager, didDiscover peripheral: CBPeripheral, advertisementData: [String : Any], rssi RSSI: NSNumber) {
print("--- didDiscover peripheral")
if let localName = advertisementData[CBAdvertisementDataLocalNameKey] as? String{
bleDevice.append(peripheral)
bleDeviceName.append(localName)
DispatchQueue.main.async{
self.tableView.reloadData()
}
}else{
print("!!!--- can't unwrap advertisementData[CBAdvertisementDataLocalNameKey]")
}
}
func centralManager(_ central: CBCentralManager, didConnect peripheral: CBPeripheral) {
print("--- didConnectPeripheral")
peripheral.delegate = self
peripheral.discoverServices(nil)
print("--- peripheral state is \(peripheral.state)")
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverServices error: Error?) {
if (error) != nil{
print("!!!--- error in didDiscoverServices: \(error?.localizedDescription)")
}
else {
print("--- error in didDiscoverServices")
for service in peripheral.services as [CBService]!{
print("before disc chara"+service.uuid.uuidString)
if service.uuid.uuidString=="11111111-1111-11111111-1111111111111" {
peripheral.discoverCharacteristics(nil, for: service)
print("disc chara")
}
}
}
}
func peripheral(_ peripheral: CBPeripheral, didDiscoverCharacteristicsFor service: CBService, error: Error?) {
if (error) != nil{
print("!!!--- error in didDiscoverCharacteristicsFor: \(error?.localizedDescription)")
}
else {
print("found charact: service"+service.uuid.uuidString)
if service.uuid == CBUUID(string: "11111111-1111-11111111-1111111111111"){
for characteristic in service.characteristics! as [CBCharacteristic]{
switch characteristic.uuid.uuidString{
case "00000000-0000-0000-0000-0000000000000":
print("Found Characteristic")
peripheral.setNotifyValue(true, for: characteristic)
default:
print()
}
}
}
}
}
func peripheral(_ peripheral: CBPeripheral, didUpdateValueFor characteristic: CBCharacteristic, error: Error?) {
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
//call function here
}
}
//这是FunctionViewController中的函数
func printTextField() {
print(textField.text)
}
最佳答案
你可以试试这个，
要从何处回拨的类->
var dismissCallBackBlock: (() -> Void)?
func dismissControllerCallBackBlock(completionBlock:@escaping () ->Void){
dismissCallBackBlock = completionBlock
}
接收回拨的类->
classObj.dismissControllerCallBackBlock { (Bool) in
}
希望，成功了。
关于ios - Swift，如何在另一个ViewController中调用函数？，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/44103350/