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Pods/AFNetworking/UIKit+AFNetworking/UIRefreshControl+AFNetworking.m 4.35 KB
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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