Basic animation Cabasicanimation-Flash back to initial state after completion

Basic animation cabasicanimation After the end, the default flash back to the initial state, how to solve it?

Position requires two properties of the device:

1     // MARK:-Don't flash back after the end . 2     Anim.removedoncompletion = NO; 3     Anim.fillmode = Kcafillmodeforwards;

After setting, no more flash back, but the position of the control is not changed, but also in the original position, but the "display layer" moved to a new location.

You can do this by using the proxy method of the animation:

    // MARK:-Fix the position of the button by proxy method    ! // This agent is written in the NSObject category and does not require any protocol    . Anim.delegate = self;

To implement the Proxy method:

1 #pragmaMark-the Proxy method for core animations2 //Core Animation starts3- (void) Animationdidstart: (Caanimation *) Anim {4 5NSLog (@"Core Animation starts");6     7 }8 9 //end of core animationTen- (void) Animationdidstop: (Caanimation *) Anim finished: (BOOL) Flag { One      A //NSLog (@ "Core animation end!"); -     //at the end of the core animation, move the control's real position! -_btn.center = Cgpointmake ( Max, -); the      -     //Remove the animation from the layer to make sure it doesn't flash! - [_btn.layer removeallanimations]; -}

If it is transform.scale,transform.rotation, only need to set anim.removedoncompletion = NO;

Common Properties:

1Cabasicanimation *basicanimation = [cabasicanimation animationwithkeypath:@"POSITION.Y"];2 3Basicanimation.duration =2;4     5     //these three properties can only be set up to a maximum of 26Basicanimation.fromvalue = @ -;7Basicanimation.byvalue = @ -;8Basicanimation.tovalue = @ -;9     TenBasicanimation.repeatcount =Cgfloat_max; One      ABasicanimation.removedoncompletion =NO; -Basicanimation.fillmode =kcafillmodeforwards; -      the[_btn.layer addanimation:basicanimation Forkey:nil];

Basic animation Cabasicanimation-Flash back to initial state after completion