通过多点触控调整图片大小和位置的方法,通过多点触控调整图片大小和位置的方法-Through the multi-touch resize and position of the method, through a multi-touch adjust the picture size and position of the method

Uiimage extensions (crop & resize)

调整图片大小长宽的组件，精选ios编程学习源码，很好的参考资料。-Component to resize the picture aspect, selection of learning IOS programming source code, a good reference.