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Pods/AFNetworking/UIKit+AFNetworking/UIRefreshControl+AFNetworking.m

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+// UIRefreshControl+AFNetworking.m
+//
+// Copyright (c) 2011–2016 Alamofire Software Foundation ( http://alamofire.org/ )
+//
+// Permission is hereby granted, free of charge, to any person obtaining a copy
+// of this software and associated documentation files (the "Software"), to deal
+// in the Software without restriction, including without limitation the rights
+// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+// copies of the Software, and to permit persons to whom the Software is
+// furnished to do so, subject to the following conditions:
+//
+// The above copyright notice and this permission notice shall be included in
+// all copies or substantial portions of the Software.
+//
+// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+// THE SOFTWARE.
+
+#import "UIRefreshControl+AFNetworking.h"
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS
+
+#import "AFURLSessionManager.h"
+
+@interface AFRefreshControlNotificationObserver : NSObject
+@property (readonly, nonatomic, weak) UIRefreshControl *refreshControl;
+- (instancetype)initWithActivityRefreshControl:(UIRefreshControl *)refreshControl;
+
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task;
+
+@end
+
+@implementation UIRefreshControl (AFNetworking)
+
+- (AFRefreshControlNotificationObserver *)af_notificationObserver {
+    AFRefreshControlNotificationObserver *notificationObserver = objc_getAssociatedObject(self, @selector(af_notificationObserver));
+    if (notificationObserver == nil) {
+        notificationObserver = [[AFRefreshControlNotificationObserver alloc] initWithActivityRefreshControl:self];
+        objc_setAssociatedObject(self, @selector(af_notificationObserver), notificationObserver, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+    }
+    return notificationObserver;
+}
+
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task {
+    [[self af_notificationObserver] setRefreshingWithStateOfTask:task];
+}
+
+@end
+
+@implementation AFRefreshControlNotificationObserver
+
+- (instancetype)initWithActivityRefreshControl:(UIRefreshControl *)refreshControl
+{
+    self = [super init];
+    if (self) {
+        _refreshControl = refreshControl;
+    }
+    return self;
+}
+
+- (void)setRefreshingWithStateOfTask:(NSURLSessionTask *)task {
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidResumeNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidSuspendNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidCompleteNotification object:nil];
+
+    if (task) {
+        UIRefreshControl *refreshControl = self.refreshControl;
+        if (task.state == NSURLSessionTaskStateRunning) {
+            [refreshControl beginRefreshing];
+
+            [notificationCenter addObserver:self selector:@selector(af_beginRefreshing) name:AFNetworkingTaskDidResumeNotification object:task];
+            [notificationCenter addObserver:self selector:@selector(af_endRefreshing) name:AFNetworkingTaskDidCompleteNotification object:task];
+            [notificationCenter addObserver:self selector:@selector(af_endRefreshing) name:AFNetworkingTaskDidSuspendNotification object:task];
+        } else {
+            [refreshControl endRefreshing];
+        }
+    }
+}
+
+#pragma mark -
+
+- (void)af_beginRefreshing {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.refreshControl beginRefreshing];
+    });
+}
+
+- (void)af_endRefreshing {
+    dispatch_async(dispatch_get_main_queue(), ^{
+        [self.refreshControl endRefreshing];
+    });
+}
+
+#pragma mark -
+
+- (void)dealloc {
+    NSNotificationCenter *notificationCenter = [NSNotificationCenter defaultCenter];
+    
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidCompleteNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidResumeNotification object:nil];
+    [notificationCenter removeObserver:self name:AFNetworkingTaskDidSuspendNotification object:nil];
+}
+
+@end
+
+#endif