iOS Controller退出后不能释放，不走dealloc方法

1、使用了计时器NSTimer，没有销毁

if (adTimer != nil) {
        [adTimer setFireDate:[NSDate distantFuture]];
        [adTimer invalidate];
        adTimer = nil;
    }

2、delegate定义为属性的时候，使用weak修饰符

@property (nonatomic,weak) id delegate;

3、使用到block的地方，注意使用弱引用，避免强引用

//解决block强引用问题 宏
#define WeakSelf(weakSelf)  __weak __typeof(&*self)weakSelf = self;
#define StrongSelf(strongSelf)  __strong __typeof(&*self)strongSelf = weakSelf;

WeakSelf(weakSelf);
 [self progressHUDShowThenHideWithText:@"注册成功" Action:^{
        GLBindWXViewController *vc = [[GLBindWXViewController alloc] init];
        vc.isFromTeminalLogin = weakSelf.isFromTeminalLogin;
        vc.isLogoutToLogin = weakSelf.isLogoutToLogin;
        vc.isGuideToLogin = weakSelf.isGuideToLogin;
        vc.isTouristToLogin = weakSelf.isTouristToLogin;
        [weakSelf.navigationController pushViewController:vc animated:YES];}];

4、block中使用到了变量，把它定义为属性，用 weakself.属性 来调用

不用
@interface GLLevelDetailViewController ()
{
    NSInteger currentTypeID;
}
@property (nonatomic,copy) NSString *currentTypeID;

WeakSelf(weakSelf);
self.detailMedalButton = [GLButton buttonWithUrlImageWithFrame:CGRectMake(SCREENWIDTH - 40.0f*widthIPhone6 - medal_w, SCREENHEIGHT - medal_w - 10.0*widthIPhone6, medal_w, medal_w) Url:nil PlaceholderImage:@"hz_pic_default.png" ActionBlock:^{
        if ([GLSceneLessonDataManager sharedInstance].hzpic != nil) {
            [weakSelf showBigDetailMedalWithUrl:[GLSceneLessonDataManager sharedInstance].hzpic PassStatus:weakSelf.isAllPass TypeID:weakSelf.currentTypeID];
        }
    }];