ios - CGAffineTransform rotation and resize on slider value -

i using slider resize , rotate-

for rotate -

 cgaffinetransform transform = editingview.transform;   transform =  cgaffinetransformmakerotation(sliderval * 2*m_pi / 30);   editingview.transform = transform; 

for resize-

cgaffinetransform t = cgaffinetransformmakescale(sliderval/30, sliderval/30);   cgpoint center = editingview.center;    [uiview animatewithduration:0.5                    animations:^{                       editingview.transform = t;                      editingview.center = center;                    }                    completion:^(bool finished) {                     }]; 

using above code,both working fine separately.

but have resize rotated view,or rotate resized view.

i saw many suggestions coming separate behavior because using cgaffinetransformmakerotation,cgaffinetransformmakescale,if use cgaffinetransformscale,cgaffinetransformrotation problem solve.

the problem when using cgaffinetransform scaling not proper,view disappears screen.

you're setting transformation matrix of view editingview.transform line.

you should change code rotate:

cgaffinetransform transform = editingview.transform; transform =  cgaffinetransformmakerotation(sliderval * 2*m_pi / 30); editingview.transform = cgaffinetransformconcat(editingview.transform, transform); 

and resize:

cgaffinetransform t = cgaffinetransformmakescale(sliderval/30, sliderval/30); cgpoint center = editingview.center;  [uiview animatewithduration:0.5                    animations:^{                       editingview.transform = cgaffinetransformconcat(editingview.transform,t);                       editingview.center = center;                    }                    completion:^(bool finished) {                     }]; 

with cgaffinetransformconcat add 2 transform matrixes won't lose older transforms. can use cgaffinetransformidentity reset transform.