縮小與放大:
1:CGAffineTransform ?transform = self.imgv.transform; //獲取當前圖片對象的Transform屬性
2:CGAffineTransform transform1 = CGAffineTransformScale(transform, 1.2, 1.2);//在原有基礎(chǔ)上進行放大 參數(shù)大于1時是放大
self.imgv.transform = transform1; //將放大過后的圖片屬性賦值給原有的圖片屬性
3:CGAffineTransform transform2 = CGAffineTransformScale(transform, 0.8, 0.8);
//圖片縮小 ?參數(shù)小于1時為縮小
self.imgv.transform = transform2; ?//縮小后的圖片屬性 賦值給原有的圖片屬性
旋轉(zhuǎn):
1:CGAffineTransform ?transform = self.imgv.transform; //獲取當前圖片對象的Transform屬性
2:self.imgv.transform = CGAffineTransformRotate(transform, M_PI_4*-1);
//在原有的基礎(chǔ)上進行逆時針旋轉(zhuǎn)
self.imgv.transform = CGAffineTransformRotate(transform, M_PI_4*1);//在原有的基礎(chǔ)上順時針旋轉(zhuǎn)
