BeeFramework 笔记 四（UISignal 总结）
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。
- (void)handleUISignal:(BeeUISignal *)signal
{
signal.reach = YES;
#if defined(__BEE_DEVELOPMENT__) && __BEE_DEVELOPMENT__
CC( @"[%@] > %@", signal.name, signal.callPath );
#endif // #if defined(__BEE_DEVELOPMENT__) && __BEE_DEVELOPMENT__
}
DEF_SIGNAL( TEST )
@end
[_innerView addSignal:Lesson2View2.TEST forControlEvents:UIControlEventTouchUpInside];
