1.普通用法

1.weakSelf：block內(nèi)部使用一次手负，引用計數(shù)不加1，self釋放途凫，weakSelf = nil

LoginViewController *loginVC = [[LoginViewController alloc]init];
__weak __typeof(self) weakSelf = self;
loginVC.loginFinished = ^(){
    [weakSelf doSomeThing];//使用多次的話，就需要strongSelf
};
[self.navigationController pushViewController:loginVC animated:YES];

2.strongSelf

LoginViewController *loginVC = [[LoginViewController alloc]init];
__weak __typeof(self) weakSelf = self;//block內(nèi)部多次使用
loginVC.loginFinished = ^(){
    __strong __typeof(self) strongSelf = weakSelf;
    [strongSelf doSomeThing];
    [strongSelf doOtherThing];
};
[self.navigationController pushViewController:loginVC animated:YES];

2.宏定義用法

1.定義宏：使用前提條件，定義一下宏

#define WeakSelf(weakSelf)      __weak __typeof(&*self)    weakSelf  = self;
#define StrongSelf(strongSelf)  __strong __typeof(&*self) strongSelf = weakSelf;

//weakSelf宏用法
/**修改用戶密碼*/
- (void)requestForModyPasswordWithCode:(NSString*)messageCode mobile:(NSString*)mobile newPasswrod:(NSString*)newPassword {

    WeakSelf(weakSelf)
    [[TJProgressHud shareInstance]showProgressView:@"正在修改密碼..."];
    [[TJNetService shareInstance] modifyPasswordWithCode:messageCode mobile:mobile passowrd:newPassword Success:^(id result) {
        /**
          .
          .
        */
        [weakSelf.navigationController popToRootViewControllerAnimated:YES];
    } Failure:^(id result) {
        [[TJProgressHud shareInstance]removeSVProgress];
        [TJToastView showWithText:@"修改密碼失敗笛厦，請稍候嘗試" topOffset:MainScreenSize.height/2.0];
    }];
}

//strongSelf宏用法
/**發(fā)送短信驗證碼*/
- (void)requestForSendMessageCodeByPhoneNumber:(NSString*)mobile{
    WeakSelf(weakSelf)
    [[TJNetService shareInstance] sendCodeOnForgetPwdWithMobile:mobile  Success:^(id result) {
        StrongSelf(strongSelf)
        [strongSelf.evbtnSendMessage setUserInteractionEnabled:NO];
        NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:1.0
                                                          target:strongSelf
                                                        selector:@selector(_efUpdateButtonStatus:)
                                                        userInfo:nil repeats:YES];
        [timer fire];
    } Failure:^(id result) {
        [TJToastView showWithText:@"驗證碼發(fā)送失敗,請稍后嘗試" topOffset:140];
    }];
}

- (void)_efUpdateButtonStatus:(NSTimer*)timer{
  //do someThing...
}