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Pods/AFNetworking/UIKit+AFNetworking/UIProgressView+AFNetworking.m

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+// UIProgressView+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 "UIProgressView+AFNetworking.h"
+
+#import <objc/runtime.h>
+
+#if TARGET_OS_IOS || TARGET_OS_TV
+
+#import "AFURLSessionManager.h"
+
+static void * AFTaskCountOfBytesSentContext = &AFTaskCountOfBytesSentContext;
+static void * AFTaskCountOfBytesReceivedContext = &AFTaskCountOfBytesReceivedContext;
+
+#pragma mark -
+
+@implementation UIProgressView (AFNetworking)
+
+- (BOOL)af_uploadProgressAnimated {
+    return [(NSNumber *)objc_getAssociatedObject(self, @selector(af_uploadProgressAnimated)) boolValue];
+}
+
+- (void)af_setUploadProgressAnimated:(BOOL)animated {
+    objc_setAssociatedObject(self, @selector(af_uploadProgressAnimated), @(animated), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+- (BOOL)af_downloadProgressAnimated {
+    return [(NSNumber *)objc_getAssociatedObject(self, @selector(af_downloadProgressAnimated)) boolValue];
+}
+
+- (void)af_setDownloadProgressAnimated:(BOOL)animated {
+    objc_setAssociatedObject(self, @selector(af_downloadProgressAnimated), @(animated), OBJC_ASSOCIATION_RETAIN_NONATOMIC);
+}
+
+#pragma mark -
+
+- (void)setProgressWithUploadProgressOfTask:(NSURLSessionUploadTask *)task
+                                   animated:(BOOL)animated
+{
+    if (task.state == NSURLSessionTaskStateCompleted) {
+        return;
+    }
+    
+    [task addObserver:self forKeyPath:@"state" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesSentContext];
+    [task addObserver:self forKeyPath:@"countOfBytesSent" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesSentContext];
+
+    [self af_setUploadProgressAnimated:animated];
+}
+
+- (void)setProgressWithDownloadProgressOfTask:(NSURLSessionDownloadTask *)task
+                                     animated:(BOOL)animated
+{
+    if (task.state == NSURLSessionTaskStateCompleted) {
+        return;
+    }
+    
+    [task addObserver:self forKeyPath:@"state" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesReceivedContext];
+    [task addObserver:self forKeyPath:@"countOfBytesReceived" options:(NSKeyValueObservingOptions)0 context:AFTaskCountOfBytesReceivedContext];
+
+    [self af_setDownloadProgressAnimated:animated];
+}
+
+#pragma mark - NSKeyValueObserving
+
+- (void)observeValueForKeyPath:(NSString *)keyPath
+                      ofObject:(id)object
+                        change:(__unused NSDictionary *)change
+                       context:(void *)context
+{
+    if (context == AFTaskCountOfBytesSentContext || context == AFTaskCountOfBytesReceivedContext) {
+        if ([keyPath isEqualToString:NSStringFromSelector(@selector(countOfBytesSent))]) {
+            if ([object countOfBytesExpectedToSend] > 0) {
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    [self setProgress:[object countOfBytesSent] / ([object countOfBytesExpectedToSend] * 1.0f) animated:self.af_uploadProgressAnimated];
+                });
+            }
+        }
+
+        if ([keyPath isEqualToString:NSStringFromSelector(@selector(countOfBytesReceived))]) {
+            if ([object countOfBytesExpectedToReceive] > 0) {
+                dispatch_async(dispatch_get_main_queue(), ^{
+                    [self setProgress:[object countOfBytesReceived] / ([object countOfBytesExpectedToReceive] * 1.0f) animated:self.af_downloadProgressAnimated];
+                });
+            }
+        }
+
+        if ([keyPath isEqualToString:NSStringFromSelector(@selector(state))]) {
+            if ([(NSURLSessionTask *)object state] == NSURLSessionTaskStateCompleted) {
+                @try {
+                    [object removeObserver:self forKeyPath:NSStringFromSelector(@selector(state))];
+
+                    if (context == AFTaskCountOfBytesSentContext) {
+                        [object removeObserver:self forKeyPath:NSStringFromSelector(@selector(countOfBytesSent))];
+                    }
+
+                    if (context == AFTaskCountOfBytesReceivedContext) {
+                        [object removeObserver:self forKeyPath:NSStringFromSelector(@selector(countOfBytesReceived))];
+                    }
+                }
+                @catch (NSException * __unused exception) {}
+            }
+        }
+    }
+}
+
+@end
+
+#endif