objective c 截屏代码
-(void)save{
uigraphicsbeginimagecontext(mybackgroundview.bounds.size); //currentview 当前的view
[mybackgroundview.layer renderincontext:uigraphicsgetcurrentcontext()];
uiimage *viewimage = uigraphicsgetimagefromcurrentimagecontext();
uigraphicsendimagecontext();
uiimagewritetosavedphotosalbum(viewimage, nil, nil, nil);
}截取 您想要的一层
uigraphicsbeginimagecontext(cgsizemake(320, 300)); //currentview 当前的view
[self.view.layer renderincontext:uigraphicsgetcurrentcontext()];
uiimage *viewimage = uigraphicsgetimagefromcurrentimagecontext();
uigraphicsendimagecontext();
uiimagewritetosavedphotosalbum(viewimage, nil, nil, nil);
截取自定义的大小
刚刚用到 不知道 是不是您想要的
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