Changed init methods to return instancetype instead of id.

Using instancetype allows the compiler to perform more error
checking. This article provides an in-depth explanation:
http://nshipster.com/instancetype/.

StreamingKit/StreamingKit/STKAudioPlayer.h

@@ -174,10 +174,10 @@ typedef void(^STKFrameFilter)(UInt32 channelsPerFrame, UInt32 bytesPerFrame, UIn
 +(STKDataSource*) dataSourceFromURL:(NSURL*)url;
 
 /// Initializes a new STKAudioPlayer with the default options
--(id) init;
+-(instancetype) init;
 
 /// Initializes a new STKAudioPlayer with the given options
--(id) initWithOptions:(STKAudioPlayerOptions)optionsIn;
+-(instancetype) initWithOptions:(STKAudioPlayerOptions)optionsIn;
 
 /// Plays an item from the given URL string (all pending queued items are removed).
 /// The NSString is used as the queue item ID

StreamingKit/StreamingKit/STKAudioPlayer.m

@@ -173,7 +173,7 @@ STKAudioPlayerInternalState;
 @end
 
 @implementation STKFrameFilterEntry
--(id) initWithFilter:(STKFrameFilter)filterIn andName:(NSString*)nameIn
+-(instancetype) initWithFilter:(STKFrameFilter)filterIn andName:(NSString*)nameIn
 {
 	if (self = [super init])
 	{
@@ -504,12 +504,12 @@ static void AudioFileStreamPacketsProc(void* clientData, UInt32 numberBytes, UIn
     }
 }
 
--(id) init
+-(instancetype) init
 {
     return [self initWithOptions:(STKAudioPlayerOptions){}];
 }
 
--(id) initWithOptions:(STKAudioPlayerOptions)optionsIn
+-(instancetype) initWithOptions:(STKAudioPlayerOptions)optionsIn
 {
     if (self = [super init])
     {

StreamingKit/StreamingKit/STKAutoRecoveringHTTPDataSource.h

@@ -45,7 +45,7 @@ STKAutoRecoveringHTTPDataSourceOptions;
 
 @interface STKAutoRecoveringHTTPDataSource : STKDataSourceWrapper
 
--(id) initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSource;
+-(instancetype) initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSource;
 
 @property (readonly) STKHTTPDataSource* innerDataSource;
 

StreamingKit/StreamingKit/STKAutoRecoveringHTTPDataSource.m

@@ -108,17 +108,17 @@ static void PopulateOptionsWithDefault(STKAutoRecoveringHTTPDataSourceOptions* o
     return (STKHTTPDataSource*)self.innerDataSource;
 }
 
--(id) initWithDataSource:(STKDataSource *)innerDataSource
+-(instancetype) initWithDataSource:(STKDataSource *)innerDataSource
 {
     return [self initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSource];
 }
 
--(id) initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSourceIn
+-(instancetype) initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSourceIn
 {
     return [self initWithHTTPDataSource:innerDataSourceIn andOptions:(STKAutoRecoveringHTTPDataSourceOptions){}];
 }
 
--(id) initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSourceIn andOptions:(STKAutoRecoveringHTTPDataSourceOptions)optionsIn
+-(instancetype) initWithHTTPDataSource:(STKHTTPDataSource*)innerDataSourceIn andOptions:(STKAutoRecoveringHTTPDataSourceOptions)optionsIn
 {
     if (self = [super initWithDataSource:innerDataSourceIn])
     {

StreamingKit/StreamingKit/STKDataSourceWrapper.h

@@ -36,7 +36,7 @@
 
 @interface STKDataSourceWrapper : STKDataSource<STKDataSourceDelegate>
 
--(id) initWithDataSource:(STKDataSource*)innerDataSource;
+-(instancetype) initWithDataSource:(STKDataSource*)innerDataSource;
 
 @property (readonly) STKDataSource* innerDataSource;
 

StreamingKit/StreamingKit/STKDataSourceWrapper.m

@@ -40,7 +40,7 @@
 
 @implementation STKDataSourceWrapper
 
--(id) initWithDataSource:(STKDataSource*)innerDataSourceIn
+-(instancetype) initWithDataSource:(STKDataSource*)innerDataSourceIn
 {
     if (self = [super init])
     {

StreamingKit/StreamingKit/STKHTTPDataSource.h

@@ -46,11 +46,11 @@ typedef void(^STKAsyncURLProvider)(STKHTTPDataSource* dataSource, BOOL forSeek,
 @property (readonly) UInt32 httpStatusCode;
 
 +(AudioFileTypeID) audioFileTypeHintFromMimeType:(NSString*)fileExtension;
--(id) initWithURL:(NSURL*)url;
--(id) initWithURL:(NSURL *)url httpRequestHeaders:(NSDictionary *)httpRequestHeaders;
--(id) initWithURLProvider:(STKURLProvider)urlProvider;
--(id) initWithAsyncURLProvider:(STKAsyncURLProvider)asyncUrlProvider;
--(NSRunLoop*) eventsRunLoop;
+-(instancetype) initWithURL:(NSURL*)url;
+-(instancetype) initWithURL:(NSURL*)url httpRequestHeaders:(NSDictionary*)httpRequestHeaders;
+-(instancetype) initWithURLProvider:(STKURLProvider)urlProvider;
+-(instancetype) initWithAsyncURLProvider:(STKAsyncURLProvider)asyncUrlProvider;
+-(nullable NSRunLoop*) eventsRunLoop;
 -(void) reconnect;
 
 @end

StreamingKit/StreamingKit/STKHTTPDataSource.m

@@ -64,19 +64,19 @@
 
 @implementation STKHTTPDataSource
 
--(id) initWithURL:(NSURL*)urlIn
+-(instancetype) initWithURL:(NSURL*)urlIn
 {
     return [self initWithURLProvider:^NSURL* { return urlIn; }];
 }
 
--(id) initWithURL:(NSURL *)urlIn httpRequestHeaders:(NSDictionary *)httpRequestHeaders
+-(instancetype) initWithURL:(NSURL *)urlIn httpRequestHeaders:(NSDictionary *)httpRequestHeaders
 {
     self = [self initWithURLProvider:^NSURL* { return urlIn; }];
     self->requestHeaders = httpRequestHeaders;
     return self;
 }
 
--(id) initWithURLProvider:(STKURLProvider)urlProviderIn
+-(instancetype) initWithURLProvider:(STKURLProvider)urlProviderIn
 {
 	urlProviderIn = [urlProviderIn copy];
     
@@ -86,7 +86,7 @@
     }];
 }
 
--(id) initWithAsyncURLProvider:(STKAsyncURLProvider)asyncUrlProviderIn
+-(instancetype) initWithAsyncURLProvider:(STKAsyncURLProvider)asyncUrlProviderIn
 {
     if (self = [super init])
     {

StreamingKit/StreamingKit/STKLocalFileDataSource.h

@@ -38,6 +38,6 @@
 
 +(AudioFileTypeID) audioFileTypeHintFromFileExtension:(NSString*)fileExtension;
 @property (readonly, copy) NSString* filePath;
--(id) initWithFilePath:(NSString*)filePath;
+-(instancetype) initWithFilePath:(NSString*)filePath;
 
 @end

StreamingKit/StreamingKit/STKLocalFileDataSource.m

@@ -47,7 +47,7 @@
 @implementation STKLocalFileDataSource
 @synthesize filePath;
 
--(id) initWithFilePath:(NSString*)filePathIn
+-(instancetype) initWithFilePath:(NSString*)filePathIn
 {
     if (self = [super init])
     {

StreamingKit/StreamingKit/STKQueueEntry.h

@@ -35,7 +35,7 @@
 @property (readwrite, retain) NSObject* queueItemId;
 @property (readwrite, retain) STKDataSource* dataSource;
 
--(id) initWithDataSource:(STKDataSource*)dataSource andQueueItemId:(NSObject*)queueItemId;
+-(instancetype) initWithDataSource:(STKDataSource*)dataSource andQueueItemId:(NSObject*)queueItemId;
 
 -(void) reset;
 -(double) duration;

StreamingKit/StreamingKit/STKQueueEntry.m

@@ -14,7 +14,7 @@
 
 @implementation STKQueueEntry
 
--(id) initWithDataSource:(STKDataSource*)dataSourceIn andQueueItemId:(NSObject*)queueItemIdIn
+-(instancetype) initWithDataSource:(STKDataSource*)dataSourceIn andQueueItemId:(NSObject*)queueItemIdIn
 {
     if (self = [super init])
     {
@@ -121,4 +121,4 @@
     return [[self queueItemId] description];
 }
 
-@end
+@end