Use `instancetype` where applicable

AFNetworking/AFHTTPSessionManager.m

@@ -268,7 +268,7 @@
     return YES;
 }
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     NSURL *baseURL = [decoder decodeObjectOfClass:[NSURL class] forKey:NSStringFromSelector(@selector(baseURL))];
     NSURLSessionConfiguration *configuration = [decoder decodeObjectOfClass:[NSURLSessionConfiguration class] forKey:@"sessionConfiguration"];
     if (!configuration) {
@@ -308,7 +308,7 @@
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFHTTPSessionManager *HTTPClient = [[[self class] allocWithZone:zone] initWithBaseURL:self.baseURL sessionConfiguration:self.session.configuration];
 
     HTTPClient.requestSerializer = [self.requestSerializer copyWithZone:zone];

AFNetworking/AFSecurityPolicy.m

@@ -198,7 +198,7 @@ static NSArray * AFPublicKeyTrustChainForServerTrust(SecTrustRef serverTrust) {
     return securityPolicy;
 }
 
-- (id)init {
+- (instancetype)init {
     self = [super init];
     if (!self) {
         return nil;

AFNetworking/AFURLRequestSerialization.m

@@ -111,14 +111,14 @@ static NSString * AFPercentEscapedStringFromString(NSString *string) {
 @property (readwrite, nonatomic, strong) id field;
 @property (readwrite, nonatomic, strong) id value;
 
-- (id)initWithField:(id)field value:(id)value;
+- (instancetype)initWithField:(id)field value:(id)value;
 
 - (NSString *)URLEncodedStringValue;
 @end
 
 @implementation AFQueryStringPair
 
-- (id)initWithField:(id)field value:(id)value {
+- (instancetype)initWithField:(id)field value:(id)value {
     self = [super init];
     if (!self) {
         return nil;
@@ -591,7 +591,7 @@ forHTTPHeaderField:(NSString *)field
     return YES;
 }
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [self init];
     if (!self) {
         return nil;
@@ -610,7 +610,7 @@ forHTTPHeaderField:(NSString *)field
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFHTTPRequestSerializer *serializer = [[[self class] allocWithZone:zone] init];
     serializer.mutableHTTPRequestHeaders = [self.mutableHTTPRequestHeaders mutableCopyWithZone:zone];
     serializer.queryStringSerializationStyle = self.queryStringSerializationStyle;
@@ -684,7 +684,7 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
 @property (readonly, nonatomic, assign) unsigned long long contentLength;
 @property (readonly, nonatomic, assign, getter = isEmpty) BOOL empty;
 
-- (id)initWithStringEncoding:(NSStringEncoding)encoding;
+- (instancetype)initWithStringEncoding:(NSStringEncoding)encoding;
 - (void)setInitialAndFinalBoundaries;
 - (void)appendHTTPBodyPart:(AFHTTPBodyPart *)bodyPart;
 @end
@@ -700,8 +700,8 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
 
 @implementation AFStreamingMultipartFormData
 
-- (id)initWithURLRequest:(NSMutableURLRequest *)urlRequest
-          stringEncoding:(NSStringEncoding)encoding
+- (instancetype)initWithURLRequest:(NSMutableURLRequest *)urlRequest
+                    stringEncoding:(NSStringEncoding)encoding
 {
     self = [super init];
     if (!self) {
@@ -893,7 +893,7 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
 @synthesize streamError;
 #pragma clang diagnostic pop
 
-- (id)initWithStringEncoding:(NSStringEncoding)encoding {
+- (instancetype)initWithStringEncoding:(NSStringEncoding)encoding {
     self = [super init];
     if (!self) {
         return nil;
@@ -1036,7 +1036,7 @@ NSTimeInterval const kAFUploadStream3GSuggestedDelay = 0.2;
 
 #pragma mark - NSCopying
 
--(id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFMultipartBodyStream *bodyStreamCopy = [[[self class] allocWithZone:zone] initWithStringEncoding:self.stringEncoding];
 
     for (AFHTTPBodyPart *bodyPart in self.HTTPBodyParts) {
@@ -1073,7 +1073,7 @@ typedef enum {
 
 @implementation AFHTTPBodyPart
 
-- (id)init {
+- (instancetype)init {
     self = [super init];
     if (!self) {
         return nil;
@@ -1251,7 +1251,7 @@ typedef enum {
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFHTTPBodyPart *bodyPart = [[[self class] allocWithZone:zone] init];
 
     bodyPart.stringEncoding = self.stringEncoding;
@@ -1314,7 +1314,7 @@ typedef enum {
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -1333,7 +1333,7 @@ typedef enum {
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFJSONRequestSerializer *serializer = [super copyWithZone:zone];
     serializer.writingOptions = self.writingOptions;
 
@@ -1393,7 +1393,7 @@ typedef enum {
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -1414,7 +1414,7 @@ typedef enum {
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFPropertyListRequestSerializer *serializer = [super copyWithZone:zone];
     serializer.format = self.format;
     serializer.writeOptions = self.writeOptions;

AFNetworking/AFURLResponseSerialization.m

@@ -173,7 +173,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
     return YES;
 }
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [self init];
     if (!self) {
         return nil;
@@ -192,7 +192,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFHTTPResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
     serializer.acceptableStatusCodes = [self.acceptableStatusCodes copyWithZone:zone];
     serializer.acceptableContentTypes = [self.acceptableContentTypes copyWithZone:zone];
@@ -289,7 +289,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -310,7 +310,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFJSONResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
     serializer.readingOptions = self.readingOptions;
     serializer.removesKeysWithNullValues = self.removesKeysWithNullValues;
@@ -410,7 +410,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -429,7 +429,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFXMLDocumentResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
     serializer.options = self.options;
 
@@ -497,7 +497,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -518,7 +518,7 @@ static id AFJSONObjectByRemovingKeysWithNullValues(id JSONObject, NSJSONReadingO
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFPropertyListResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
     serializer.format = self.format;
     serializer.readOptions = self.readOptions;
@@ -713,7 +713,7 @@ static UIImage * AFInflatedImageFromResponseWithDataAtScale(NSHTTPURLResponse *r
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -744,7 +744,7 @@ static UIImage * AFInflatedImageFromResponseWithDataAtScale(NSHTTPURLResponse *r
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFImageResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
 
 #if TARGET_OS_IOS || TARGET_OS_TV
@@ -799,7 +799,7 @@ static UIImage * AFInflatedImageFromResponseWithDataAtScale(NSHTTPURLResponse *r
 
 #pragma mark - NSSecureCoding
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     self = [super initWithCoder:decoder];
     if (!self) {
         return nil;
@@ -818,7 +818,7 @@ static UIImage * AFInflatedImageFromResponseWithDataAtScale(NSHTTPURLResponse *r
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     AFCompoundResponseSerializer *serializer = [[[self class] allocWithZone:zone] init];
     serializer.responseSerializers = self.responseSerializers;
 

AFNetworking/AFURLSessionManager.m

@@ -1154,7 +1154,7 @@ expectedTotalBytes:(int64_t)expectedTotalBytes
     return YES;
 }
 
-- (id)initWithCoder:(NSCoder *)decoder {
+- (instancetype)initWithCoder:(NSCoder *)decoder {
     NSURLSessionConfiguration *configuration = [decoder decodeObjectOfClass:[NSURLSessionConfiguration class] forKey:@"sessionConfiguration"];
 
     self = [self initWithSessionConfiguration:configuration];
@@ -1171,7 +1171,7 @@ expectedTotalBytes:(int64_t)expectedTotalBytes
 
 #pragma mark - NSCopying
 
-- (id)copyWithZone:(NSZone *)zone {
+- (instancetype)copyWithZone:(NSZone *)zone {
     return [[[self class] allocWithZone:zone] initWithSessionConfiguration:self.session.configuration];
 }
 

Example/iOS Example/Views/PostTableViewCell.m

@@ -29,7 +29,7 @@
 
 @implementation PostTableViewCell
 
-- (id)initWithStyle:(UITableViewCellStyle)style
+- (instancetype)initWithStyle:(UITableViewCellStyle)style
               reuseIdentifier:(NSString *)reuseIdentifier
 {
     self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];

UIKit+AFNetworking/AFNetworkActivityIndicatorManager.m

@@ -60,7 +60,7 @@ static NSURLRequest * AFNetworkRequestFromNotification(NSNotification *notificat
     return [NSSet setWithObject:@"activityCount"];
 }
 
-- (id)init {
+- (instancetype)init {
     self = [super init];
     if (!self) {
         return nil;