ios

问题 Can I transfer audio stream from one iOS device to other iOS device (for example from 4s to new iPad) using CoreBluetooth framework. Maybe BLE is too slow fo media streaming? 回答1: Bluetooth Low Energy (BLE) is not intended to stream data ! If you want to a stream you MUST use Bluetooth 2.X+EDR and an appropriate profile. Therefore, if you want to stream audio, you need a headset or A2DP profile. CoreBluetooth API give only access to BLE devices. 回答2: Audio streaming wont work any good, since

问题 I want to print a page (or some pages) from an iPad app I'm developing. The first thing the app does when launching is to load an external web site by this code: window.location = https://*****.**; It is from this external web site I now want to print some stuff (works great in Safari on iPad). Trying this simple code window.print(); But it doesn't work i the wrapped web app by Cordova/Phonegap. I know there's plugins for this > but those require the js/html code to be local to work, right?

问题 I have a program, it is an editor for Twitter tweets, it's counting the text to make it less than 280 character as twitter restriction. I use for that utf8 property like this: var str = "℞" let r = str.utf8.count The result = 3 This symbol (℞) and more like it takes only 2 character in twitter counter but the result in this code gave me 3, so i can't give the user the exact character count! How can I get the correct count: 2 回答1: Counting characters Tweet length is measured by the number of

问题 I am a ios developer. I can take a value from arduino sensor. But i cannot send a message by using the following the method. [peripheral writeValue:dataToWrite forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse]; " dataToWrite " value is alloc by using NSString * NSString* data = @"1"; NSData* dataToWrite = [data dataUsingEncoding:NSUTF8StringEncoding]; and the following code is full code of "DiscoverCharacteristics in service" //DISCOVER CHAR -(void)peripheral:

问题 I am a ios developer. I can take a value from arduino sensor. But i cannot send a message by using the following the method. [peripheral writeValue:dataToWrite forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse]; " dataToWrite " value is alloc by using NSString * NSString* data = @"1"; NSData* dataToWrite = [data dataUsingEncoding:NSUTF8StringEncoding]; and the following code is full code of "DiscoverCharacteristics in service" //DISCOVER CHAR -(void)peripheral:

问题 I am a ios developer. I can take a value from arduino sensor. But i cannot send a message by using the following the method. [peripheral writeValue:dataToWrite forCharacteristic:characteristic type:CBCharacteristicWriteWithResponse]; " dataToWrite " value is alloc by using NSString * NSString* data = @"1"; NSData* dataToWrite = [data dataUsingEncoding:NSUTF8StringEncoding]; and the following code is full code of "DiscoverCharacteristics in service" //DISCOVER CHAR -(void)peripheral:

问题 I've a problem trying to distribute my iOS app with Kotlin Multiplatform on the Apple App Store: ERROR ITMS-90171: "Invalid Bundle Structure - The binary file 'Smiledu_app.app/Frameworks/shared.framework/shared' is not permitted. Your app can’t contain standalone executables or libraries, other than a valid CFBundleExecutable of supported bundles. Refer to the Bundle Programming Guide at https://developer.apple.com/go/?id=bundle-structure for information on the iOS app bundle structure." This

问题 I've a problem trying to distribute my iOS app with Kotlin Multiplatform on the Apple App Store: ERROR ITMS-90171: "Invalid Bundle Structure - The binary file 'Smiledu_app.app/Frameworks/shared.framework/shared' is not permitted. Your app can’t contain standalone executables or libraries, other than a valid CFBundleExecutable of supported bundles. Refer to the Bundle Programming Guide at https://developer.apple.com/go/?id=bundle-structure for information on the iOS app bundle structure." This

问题 I'm attempting to put a collection view within the navigation bar, as seen in iMessage group chats where all members have their initials in circles in the nav bar. I found an answer here on SO and I did my best to convert it to iOS10/Swift 3, but the collection view cells are not showing up in the nav bar correctly. Here's my code: import UIKit weak var collectionView: UICollectionView? class ChatController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource { override

问题 I'm attempting to put a collection view within the navigation bar, as seen in iMessage group chats where all members have their initials in circles in the nav bar. I found an answer here on SO and I did my best to convert it to iOS10/Swift 3, but the collection view cells are not showing up in the nav bar correctly. Here's my code: import UIKit weak var collectionView: UICollectionView? class ChatController: UIViewController, UICollectionViewDelegate, UICollectionViewDataSource { override