objective c - Slide up UIView following finger similar to Control Center in iOS -


i have uitableview @ bottom of main uiviewcontroller, shows top 2 rows. show rest don't want scroll, want user able "pull" view reveal additional 4 rows (can swipe down on "push" original place), , want "pull" similar how control center works in ios. spring has great.

looks can add uipangesturerecognizer pull:

uipangesturerecognizer * pan = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(pan:)]; pan.maximumnumberoftouches = pan.minimumnumberoftouches = 1; [self addgesturerecognizer:pan];  - (void)pan:(uipangesturerecognizer *)apan; {   cgpoint currentpoint = [apan locationinview:self];    [uiview animatewithduration:0.01f                    animations:^{                      cgrect oldframe = _viewtochange.frame;                      _viewtochange.frame = cgrectmake(oldframe.origin.x, currentpoint.y, oldframe.size.width, ([uiscreen mainscreen].bounds.size.height - currentpoint.y));                    }]; }

ref question.

doing does sort of work, uitableview flashes pull , disappears.

there no spring, , no way set "max" can't pull view past point.

does have ideas on how can achieved?

this how write pan:. t tableview(initially user interaction disabled). 40 in code more realistic in pan. 200 max value used , 60 min value. directly add t tableview height 60 , increased height animation.

    - (void)pan:(uipangesturerecognizer *)apan; {     cgpoint currentpoint = [apan locationinview:self.view];      cgrect fr = t.frame;      if ((currentpoint.y - fr.origin.y) < 40 && (fr.size.height <= 200) )     {         float nh = (currentpoint.y >= self.view.frame.size.height - 200) ? self.view.frame.size.height-currentpoint.y : 200;         if (nh < 60) {             nh = 60;         }         [uiview animatewithduration:0.01f animations:^{             [t setframe:cgrectmake(0, self.view.frame.size.height-nh, t.frame.size.width, nh)];         }];         if (nh == 200) {             [t setuserinteractionenabled:yes];         }         else         {             [t setuserinteractionenabled:no];         }     }  }

or without pan; using tableview's scrollview delegate methods, when tableview begin dragging in closed state, opening large mode , when tableview scroll top sliding down 

-(void)scrollviewwillbegindragging:(uiscrollview *)scrollview {     nslog(@"scroll");     if (scrollview.contentoffset.y == 0) {         [uiview animatewithduration:0.2f animations:^{             [scrollview setframe:cgrectmake(0, self.view.frame.size.height-200, t.frame.size.width, 200)];         }];     } } -(void)scrollviewdidscroll:(uiscrollview *)scrollview {     if (scrollview.contentoffset.y == 0) {         [uiview animatewithduration:0.2f animations:^{             [scrollview setframe:cgrectmake(0, self.view.frame.size.height-60, t.frame.size.width, 60)];         }];     } }

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