selector传递参数2018-01-23

1、NSTimer在对@selector(onTimer:)传递参数时，将传参的对象储存在了NSTimer的userInfo的字典里，在- (void)onTimer:(NSTimer *)timer中

通过取出该字典加以使用。

- (void)onTimer:(NSTimer *)timer

{ 

//通过[timer userInfo] 取出参数

    UIView *oldView = [[timer userInfo] objectForKey:@"oldView"];

}

2、直接传参

[self performSelectorOnMainThread:@selector(addNotifications:)withObject:[NSArrayarrayWithObjects:@"1",@"2",nil]waitUntilDone:NO];

该方法参数写在object中，

-(void)addNotifications:(NSArray*)data{

    if(data==nil||data.count!=2) {

        return;

    }

    //nsstring字符串转nsinteger

    NSInteger notifyNum=[(NSString*)data[0] intValue];

    NSInteger index=[data[1] intValue];

    MyNBTabButton *button=_buttonData[index];

    [button.light addNotifications:notifyNum];

}