swift3.0.2 | 易学教程

print() vs debugPrint() in swift

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问题 This might be a simple question but because of clear understanding between print() and debug() print in swift I am unable to understand where to use each one. 回答1: You use debugPrint when you want more information about what is being printed to the console. The additional information is usually useful for debugging. print() - Writes the textual representations of the given items into the standard output. debugPrint() - Writes the textual representations of the given items most suitable for

print() vs debugPrint() in swift

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“dyld`__abort_with_payload” error on iPhone 5s device

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问题 I'm trying to run my app on device (iphone 5s) and I got this error when the device tries to run my app. Then it only shows white screen. What's wrong with my device? My code works fine when I use simulator. Any help would be appreciated! 回答1: I tried everything whatever I can do. Finally I solved it by disabling "Enable guard Malloc" from diagnostics. Now I can able to run the app on device. 回答2: project cleaning helped me out 回答3: I solved it! I did everything mentioned by Faisal Sabri in

“dyld`__abort_with_payload” error on iPhone 5s device

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Camera and photo library together in iOS

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问题 I am creating an app in which I need to show both camera and photo library together in same screen. top half of the screen will have the camera and bottom half of the screen will have photo library. See the screenshot. Also please let me know if it is feasible or not and if it is possible then please help me how to do that. Thank you. 回答1: you tried the instagram SDK? Has a method that works for me 来源： https://stackoverflow.com/questions/41997832/camera-and-photo-library-together-in-ios

Swift: second occurrence with indexOf

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问题 let numbers = [1,3,4,5,5,9,0,1] To find the first 5 , use: numbers.indexOf(5) How do I find the second occurence? 回答1: You can perform another search for the index of element at the remaining array slice as follow: edit/update: Xcode 9 • Swift 4 or later extension Collection where Element: Equatable { func secondIndex(of element: Element) -> Index? { guard let index = firstIndex(of: element) else { return nil } return self[self.index(after: index)...].firstIndex(of: element) } func indexes(of

Google maps not display about new version with xcode8.2

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问题 I try to use the Google Maps SDK for iOS with the Swift and Xcode 8.2. I had set the API Key correct. I using the Google Map SDK website sample code. let camera = GMSCameraPosition.cameraWithLatitude(-33.86, longitude: 151.20, zoom: 6) let mapView = GMSMapView.mapWithFrame(CGRectZero, camera: camera) mapView.myLocationEnabled = true myView = mapView It will show the errors: 'cameraWithLatitude(_:longitude:zoom:)' has been renamed to 'camera(withLatitude:longitude:zoom:)' swift:84:47:

Swift: second occurrence with indexOf

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let numbers = [1,3,4,5,5,9,0,1] To find the first 5 , use: numbers.indexOf(5) How do I find the second occurence? You can perform another search for the index of element at the remaining array slice as follow: edit/update: Xcode 9 • Swift 4 or later extension Collection where Element: Equatable { func secondIndex(of element: Element) -> Index? { guard let index = firstIndex(of: element) else { return nil } return self[self.index(after: index)...].firstIndex(of: element) } func indexes(of element: Element) -> [Index] { var indexes: [Index] = [] var startIndex = self.startIndex while let index =