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2014/10/15 ¤U¤È 10:15:02
iphone Programming Glossary: totalbytesHow do I find the size of my Core Data persistent store and the free space on the file system? http://stackoverflow.com/questions/1719888/how-do-i-find-the-size-of-my-core-data-persistent-store-and-the-free-space-on-th size in bytes unsigned long long NSArray allStores self.persistentStoreCoordinator persistentStores unsigned long long totalBytes 0 NSFileManager fileManager NSFileManager defaultManager for NSPersistentStore store in allStores if store.URL isFileURL.. URL path DebugLog @ persistent store path @ path NSDictionary has a category to assist with NSFileManager attributes totalBytes fileManager attributesOfItemAtPath path error NULL fileSize Note that the code above is in a method of my app delegate and..
Drawing waveform with AVAssetReader http://stackoverflow.com/questions/5032775/drawing-waveform-with-avassetreader 2 channelCount SInt16 normalizeMax 0 NSMutableData fullSongData NSMutableData alloc init reader startReading UInt64 totalBytes 0 SInt64 totalLeft 0 SInt64 totalRight 0 NSInteger sampleTally 0 NSInteger samplesPerPixel sampleRate 50 while reader.status.. blockBufferRef CMSampleBufferGetDataBuffer sampleBufferRef size_t length CMBlockBufferGetDataLength blockBufferRef totalBytes length NSAutoreleasePool wader NSAutoreleasePool alloc init NSMutableData data NSMutableData dataWithLength length CMBlockBufferCopyDataBytes.. NSLog @ normalizeMax f normalizeMax NSMutableData fullSongData NSMutableData alloc init reader startReading UInt64 totalBytes 0 Float64 totalLeft 0 Float64 totalRight 0 Float32 sampleTally 0 NSInteger samplesPerPixel sampleRate 50 while reader.status..
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