From 7b02207537d35bfa1714bf8beafc921f717d100a Mon Sep 17 00:00:00 2001
From: 单军华
Date: Wed, 11 Jul 2018 10:47:42 +0800
Subject: [PATCH] 首次上传

---
 screendisplay/Pods/YYCategories/YYCategories/Foundation/NSObject+YYAddForKVO.h |   54 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 files changed, 54 insertions(+), 0 deletions(-)

diff --git a/screendisplay/Pods/YYCategories/YYCategories/Foundation/NSObject+YYAddForKVO.h b/screendisplay/Pods/YYCategories/YYCategories/Foundation/NSObject+YYAddForKVO.h
new file mode 100755
index 0000000..b3f1df1
--- /dev/null
+++ b/screendisplay/Pods/YYCategories/YYCategories/Foundation/NSObject+YYAddForKVO.h
@@ -0,0 +1,54 @@
+//
+//  NSObject+YYAddForKVO.h
+//  YYCategories <https://github.com/ibireme/YYCategories>
+//
+//  Created by ibireme on 14/10/15.
+//  Copyright (c) 2015 ibireme.
+//
+//  This source code is licensed under the MIT-style license found in the
+//  LICENSE file in the root directory of this source tree.
+//
+
+#import <Foundation/Foundation.h>
+
+NS_ASSUME_NONNULL_BEGIN
+
+/**
+ Observer with block (KVO).
+ */
+@interface NSObject (YYAddForKVO)
+
+/**
+ Registers a block to receive KVO notifications for the specified key-path 
+ relative to the receiver.
+ 
+ @discussion The block and block captured objects are retained. Call
+ `removeObserverBlocksForKeyPath:` or `removeObserverBlocks` to release.
+ 
+ @param keyPath The key path, relative to the receiver, of the property to 
+ observe. This value must not be nil.
+ 
+ @param block   The block to register for KVO notifications.
+ */
+- (void)addObserverBlockForKeyPath:(NSString*)keyPath
+                             block:(void (^)(id _Nonnull obj, id _Nonnull oldVal, id _Nonnull newVal))block;
+
+/**
+ Stops all blocks (associated by `addObserverBlockForKeyPath:block:`) from
+ receiving change notifications for the property specified by a given key-path 
+ relative to the receiver, and release these blocks.
+ 
+ @param keyPath A key-path, relative to the receiver, for which blocks is 
+ registered to receive KVO change notifications.
+ */
+- (void)removeObserverBlocksForKeyPath:(NSString*)keyPath;
+
+/**
+ Stops all blocks (associated by `addObserverBlockForKeyPath:block:`) from
+ receiving change notifications, and release these blocks.
+ */
+- (void)removeObserverBlocks;
+
+@end
+
+NS_ASSUME_NONNULL_END

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