When setting the audio format, the following programs will fail:
Note: I added UInt, but I get an error in as [NSObject:AnyObject] of soundRecorder.
let recordSettings: [String:Any] = [AVFormatIDKey:UInt(kAudioFormatAppleLossless),
AVencoderAudioQualityKey: AVAudioQuality.Max.rawValue,
AVencoderBitRateKey: 160000,
AVNumberOfChannelsKey—2,
AVSampleRateKey:8000.0]
variable error:NSError?
soundRecorder=AVAudioRecorder(URL:getFileURL(), settings:recordSettings as [NSObject:AnyObject], error:&error) // This is where the error occurs.
If anyone is aware of this, I would appreciate your guidance.
ios swift
The code for the question before editing was OK with Xcode6, but now it's Xcode7/iOS9SDK and
kAudioFormatAppleLossless goes from Int to UInt32, and bits-specified numeric types such as UInt32 are not automatically converted to NSNumber, which results in an error.
Therefore, Xcode7 must explicitly convert to a AnyObject compatible type such as UInt.
If you leave it as it is, the recordSettings will be NSDictionary, so specify the [String:AnyObject] that the AVAudioRecorder initializer requests.
let recordSettings: String: AnyObject = [
AVFormatIDKey: UInt (kAudioFormatAppleLossless), // < -- This
AVencoderAudioQualityKey: AVAudioQuality.Max.rawValue,
AVencoderBitRateKey: 160000,
AVNumberOfChannelsKey—2,
AVSampleRateKey—8000.0
]
NSNumber (unsingedInt:kAudioFormatAppleLossless) is fine, but
UInt has fewer characters.
Also, the AVAudioRecorder initializer is now throw, so you need to handle or ignore errors such as try.Swift error handling is not discussed here because it is different from the purpose of the question.
Since the compiler is not able to infer the type, for example, specify the type: var recordSettings: [String:Any].
var recordSettings: String: Any = AVFormatIDKey:kAudioFormatAppleLossless,
AVencoderAudioQualityKey: AVAudioQuality.Max.rawValue,
AVencoderBitRateKey: 160000,
AVNumberOfChannelsKey—2,
AVSampleRateKey:8000.0]
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