http://yang152412.blog.163.com/blog/static/175861582201332321351862/

一、UISignal的工作模式

  1、发送Signal，比如从ViewController的loadView和ViewDidLoad方法，Button的touch方法，view更改frame的方法。

在框架中， 系统的 loadView和ViewDidLoad方法，Button的touch方法 大部分都在 封装的 类中实现，子类没有实现，通过signal来回调到子类。

[self sendUISignal:BeeUIButton.TOUCH_DOWN];

  2、在UIView的扩展类或者 UIViewController扩展类 中 生成 对应的Signal

- (BeeUISignal *)sendUISignal:(NSString *)name

{

return [self sendUISignal:name withObject:nil from:self];

}

- (BeeUISignal *)sendUISignal:(NSString *)name withObject:(NSObject *)object

{

return [self sendUISignal:name withObject:object from:self];

}

- (BeeUISignal *)sendUISignal:(NSString *)name withObject:(NSObject *)object from:(id)source{

BeeUISignal * signal = [[[BeeUISignal alloc] init] autorelease];

if ( signal )

{

NSString * selName = self.tagString.lowercaseString;

selName = [selName stringByReplacingOccurrencesOfString:@"-" withString:@"_"];

// selName = [selName stringByReplacingOccurrencesOfString:@":" withString:@"_"];

signal.preSelector = selName; // v0.3.0 new feature, signal binding

signal.source = source ? source : self;

signal.target = self;

signal.name = name;

signal.object = object;

[signal send];

}

return signal;

}

2、[signal send];  生成的signal 调用send方法，来传递 该signal

   在 send 方法里面，解析 传递的 name，判断source 是不是 发送消息类的子类。更新 foreign, _callPath,_sendTimeStamp,_reach,_jump 等属性。然后调用 routes方法。

3、在 - (void)routes;  方法里面，根据 signal 的 name，target，判断 target 是否实现了 响应方法，

  NSString * clazz = (NSString *)[array objectAtIndex:1];

NSString * method = (NSString *)[array objectAtIndex:2];

NSObject * targetObject = _target;

if ( [_target isKindOfClass:[UIView class]] )

{

UIViewController * viewController = [(UIView *)_target viewController];

if ( viewController )

{

targetObject = viewController;

}

}

#if defined(__BEE_SELECTOR_STYLE2__) && __BEE_SELECTOR_STYLE2__

{

NSString * selectorName;

SEL selector;

selectorName = [NSString stringWithFormat:@"handleUISignal_%@_%@:", clazz, method];

selector = NSSelectorFromString(selectorName);

if ( [targetObject respondsToSelector:selector] )

{

[targetObject performSelector:selector withObject:self];

return;

}

selectorName = [NSString stringWithFormat:@"handleUISignal_%@:", clazz];

selector = NSSelectorFromString(selectorName);

if ( [targetObject respondsToSelector:selector] )

{

[targetObject performSelector:selector withObject:self];

return;

}

}

#endif // #if defined(__BEE_SELECTOR_STYLE2__) && __BEE_SELECTOR_STYLE2__

#if defined(__BEE_SELECTOR_STYLE1__) && __BEE_SELECTOR_STYLE1__

{

NSString * selectorName;

SEL selector;

selectorName = [NSString stringWithFormat:@"handle%@:", clazz];

selector = NSSelectorFromString(selectorName);

if ( [targetObject respondsToSelector:selector] )

{

[targetObject performSelector:selector withObject:self];

return;

}

如果都没有实现，则 遍历 父类 有没有实现，如果父类没有实现，则 判断 _target 是否响应 handleUISignal:方法，如果实现（应该总是有的，因为 所有view控件的父类总是UIView，而框架 扩展UIView类：UIView(BeeUISignal) 里面实现了方法，

- (void)handleUISignal:(BeeUISignal *)signal

{

if ( self.superview )

{

[signal forward:self.superview];

}

else

{

signal.reach = YES;

#if defined(__BEE_DEVELOPMENT__) && __BEE_DEVELOPMENT__

CC( @"[%@] > %@", signal.name, signal.callPath );

#endif // #if defined(__BEE_DEVELOPMENT__) && __BEE_DEVELOPMENT__

}

}

BeeUIButton 的触法事件 Signal 的 callPath，从上到下 依次 遍历，直到找到 实现响应方法。

[signal.BeeUIButton.TOUCH_DOWN] > BeeUIButton > Lesson2View2 > Lesson2View1 > BeeUIBoardView > Lesson2Board

和UIView+BeeUISignal 类似，UIVIewController的扩展类 也实现了 最基本的 响应方法，一遍 BeeUISignal的 routes方法 最后的判断做处理。只是没有了 判断 view是否有 superview。

DEF_SIGNAL( TEST )

@end

[_innerView addSignal:Lesson2View2.TEST forControlEvents:UIControlEventTouchUpInside];

BeeFramework 笔记 四（UISignal 总结）