IOS视图旋转可放大缩小

-(IBAction)hideBut:(id)sender{

if(self.flg){

[UIViewanimateWithDuration:0.3animations:^{
self.meunBaseLayer.transform=CGAffineTransformRotate(self.meunBaseLayer.transform,3.14);
//缩放是按比例缩放
self.meunBaseLayer.transform=CGAffineTransformScale(self.meunBaseLayer.transform,0.5,0.5);
}];
self.flg=NO;
}else{
[UIViewanimateWithDuration:0.3animations:^{
self.meunBaseLayer.transform=CGAffineTransformRotate(self.meunBaseLayer.transform,-3.14);
self.meunBaseLayer.transform=CGAffineTransformScale(self.meunBaseLayer.transform,2,2);
}];
self.flg=YES;
}

}

CGAffineTransformRotate：视图旋转，根据π值的正负确定旋转的角度。

CGAffineTransformScale：视图缩放，缩放是根据当前视图的比例进行的操作。