我以前的kvo NSMutableArray,调用add不够优雅
//www.greatytc.com/p/47f766ec60a2

现在利用ReactiveObjC的rac_signalForSelector,调用add很优雅(原理利用aop)

使用

• 监听

  __weak typeof(self) weakSelf = self;
    [self.dataArray ax_addKVO:^(NSMutableArray * _Nonnull array) {
        __strong typeof(weakSelf) strongSelf = weakSelf;
        NSLog(@"strongSelf.dataArray =  %@",strongSelf.dataArray);
        NSLog(@"array = %@",array);
    }];

• 添加

[self.dataArray addObject:@"2"];

代码

添加 NSMutableArray 分类

• .h文件

#import <Foundation/Foundation.h>

NS_ASSUME_NONNULL_BEGIN

@interface NSMutableArray (AXKVO)


/// NSMutableArray 监听方法
/// @param handler 回调
-(void)ax_addKVO:(void(^)(NSMutableArray *array))handler;

@end

NS_ASSUME_NONNULL_END

• .m文件,还有很多方法,自行添加

#import "NSMutableArray+AXKVO.h"
#import <ReactiveObjC/ReactiveObjC.h>

@implementation NSMutableArray (AXKVO)

-(void)ax_addKVO:(void(^)(NSMutableArray *array))handler{
    
    /// add
    [self _ax_addSelector:@selector(addObject:) handler:handler];
    
    /// set
    [self _ax_addSelector:@selector(setObject:atIndexedSubscript:) handler:handler];
    
    
    /// insert
    [self _ax_addSelector:@selector(insertObject: atIndex:) handler:handler];
    [self _ax_addSelector:@selector(insertObject: atIndex:) handler:handler];
    
    ///replace
    [self _ax_addSelector:@selector(replaceObjectAtIndex: withObject:) handler:handler];
    
    /// remove
    [self _ax_addSelector:@selector(removeLastObject) handler:handler];
    [self _ax_addSelector:@selector(removeObject:) handler:handler];
    [self _ax_addSelector:@selector(removeAllObjects) handler:handler];
    [self _ax_addSelector:@selector(removeObjectAtIndex:) handler:handler];

}

-(void)_ax_addSelector:(SEL)selector handler:(void(^)(NSMutableArray *array))handler{
    
    __weak typeof(self) weakSelf = self;
    [[self rac_signalForSelector:selector] subscribeNext:^(id  _Nullable x) {
        __strong typeof(weakSelf) strongSelf = weakSelf;
        if (handler) {
            handler(strongSelf);
        }
    }];
}

@end