objective-c

问题 How to detect received SMS and send SMS to that number launching my app if this sms contain specific message . Please suggest how i detect that a new messaqge received while my app is not running . 回答1: Simple answer is It is NOT possible in iOS device (non jailbroken) you cannot get any data on SMS messages or phone calls, so the best way is stop fighting with it. Not sure but it may achieve by jailbroken device. Apple said - In iPhone OS 4.0 and later, you can send text messages from within

问题 I am trying to open a cocoa GUI application from authorization plugin which runs during login. I have placed the application in /Library/Application Support/MyFolder/Example.app . I am using below environment and code to open the application. Environment OSX: 10.14.5 (Mojave) Xcode: 11.2.1 Swift: 4.2 Code let task = Process.init() task.launchPath = "/Library/Application Support/MyFolder/Example.app/Contents/MacOS/Example" task.arguments = ["Hi", "Hello"] task.launch() task.waitUntilExit()

问题 I am trying to open a cocoa GUI application from authorization plugin which runs during login. I have placed the application in /Library/Application Support/MyFolder/Example.app . I am using below environment and code to open the application. Environment OSX: 10.14.5 (Mojave) Xcode: 11.2.1 Swift: 4.2 Code let task = Process.init() task.launchPath = "/Library/Application Support/MyFolder/Example.app/Contents/MacOS/Example" task.arguments = ["Hi", "Hello"] task.launch() task.waitUntilExit()

问题 In Apple-generated code (Core Data NSManagedObject subclasses, for example) I see this: @objc(LPFile) public class LPFile: NSManagedObject { ... } My question is: why is the @objc declaration done as above, instead of: @objc public class LPFile: NSManagedObject { ... } or @objcMembers public class LPFile: NSManagedObject { ... } What is special about the separate @objc(identifier) declaration? I can't seem to find documentation about it and googling just turns up the other two approaches.

问题 In Apple-generated code (Core Data NSManagedObject subclasses, for example) I see this: @objc(LPFile) public class LPFile: NSManagedObject { ... } My question is: why is the @objc declaration done as above, instead of: @objc public class LPFile: NSManagedObject { ... } or @objcMembers public class LPFile: NSManagedObject { ... } What is special about the separate @objc(identifier) declaration? I can't seem to find documentation about it and googling just turns up the other two approaches.

问题 In Apple-generated code (Core Data NSManagedObject subclasses, for example) I see this: @objc(LPFile) public class LPFile: NSManagedObject { ... } My question is: why is the @objc declaration done as above, instead of: @objc public class LPFile: NSManagedObject { ... } or @objcMembers public class LPFile: NSManagedObject { ... } What is special about the separate @objc(identifier) declaration? I can't seem to find documentation about it and googling just turns up the other two approaches.

问题 The code is let request: NSFetchRequest<NSFetchRequestResult> = Item.fetchRequest() print(request) Item is an entity of Core Data. The first execution is correct, but when execute it again error occurs Thread 12: EXC_BAD_ACCESS (code=1, address=0x0) . The following is logs: This is a similar question, but with Object C. It says that defining managedObjectContext in view controller directly instead of transferring it from AppDelegate can fix the bug. In my code, the managedObjectContext is in

问题 The code is let request: NSFetchRequest<NSFetchRequestResult> = Item.fetchRequest() print(request) Item is an entity of Core Data. The first execution is correct, but when execute it again error occurs Thread 12: EXC_BAD_ACCESS (code=1, address=0x0) . The following is logs: This is a similar question, but with Object C. It says that defining managedObjectContext in view controller directly instead of transferring it from AppDelegate can fix the bug. In my code, the managedObjectContext is in

问题 I am newbie in coding and trying to learn objective c, I tried searching my question on internet and stack overflow but not getting proper solution. I am trying to save some data into array and after that I want to save that subarray into main array and after that main array into file. below code is working properly for me but the data is not appending in file . self.details = [[NSMutableArray alloc]init]; [self.details insertObject:self.firstName atIndex:0]; [self.details insertObject:self

问题 I have a table of the type inset grouped style. Depending on some selections I want to hide some cells by reducing their height to 0. Now is there anyway to still show rounded corners even if the respective cell has height 0? Or how would you do that? I don't want to "delete" the cell, otherwise it is much more complex to keep track of the cells for me. 来源： https://stackoverflow.com/questions/61502471/tableview-with-inset-grouped-style-have-rounded-corners-even-with-hidden-cells