模态的跳转底层

  • 当在modal时,会把窗口上面的view给移除掉,然后要modal控制器的view给添加到窗口上
    • 如果当一个控制器被销毁,那么它的View的业务逻辑是无法处理的
    • 控制器被销毁,控制器的View不一定被销毁(只要有强指针指向它,就不会被销毁)
模态的跳转底层_第1张图片
自定义modal
  • 1.modal跳转
- (IBAction)click:(UIButton *)sender {

   #pragma mark 1.系统的modal,系统在跳转时控制器不会被销毁是
   因为有一个属性在强引用控制器self.presentedViewController

  
 NSLog(@"%@",self.presentedViewController);
OneViewController *one = [OneViewController new];

//当在modal时,会把窗口上面的view给移除掉,然后要modal控制器的view给添加到窗口上
// 如果当一个控制器被销毁,那么它的View的业务逻辑是无法处理的
// 控制器被销毁,控制器的View不一定被销毁(只要有枪指针指向它,就不会被销毁)


//    [self presentViewController:one animated:YES completion:^{
//      
//        NSLog(@"完成了模态");
//        
//    }];

#pragma mark 2.自定义的modal

CGRect frame = one.view.frame;
frame.origin.y = [UIScreen mainScreen].bounds.size.height;
one.view.frame = frame;

[[UIApplication sharedApplication].keyWindow addSubview:one.view];

//强引用控制器,防止被销毁
_oneVC = one;

[UIView animateWithDuration:0.5 animations:^{
    
    one.view.frame = self.view.frame;
    
    } completion:^(BOOL finished) {
    
      //[self.view removeFromSuperview];
      
    }];
 }
  • 2.modal返回
   - (IBAction)back:(UIButton *)sender {

    #pragma mark 1.系统的modal

    //[self dismissViewControllerAnimated:YES completion:nil];

    #pragma mark 2.自定义的modal
    [UIView animateWithDuration:0.5 animations:^{
    
    
    CGRect frame = self.view.frame;
    frame.origin.y = [UIScreen mainScreen].bounds.size.height;
    
    self.view.frame = frame;
    
} completion:^(BOOL finished) {
    
    //[[UIApplication sharedApplication].keyWindow addSubview:self.view];
    
   }];
}

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