Several ways to stretch pictures in iOS

<span id="Label3"></p><p><p>1. Uiimageview Overall stretching</p></p><p><p>Uiimageview-contentmode</p></p><pre class="brush:cpp;toolbar: true; auto-links: false;">Typedef ns_enum (nsinteger, uiviewcontentmode)  {     uiviewcontentmodescaletofill,         //  default   extrude (deform)     UIViewContentModeScaleAspectFit,      //  equal scale stretching     UIViewContentModeScaleAspectFill,     //  Proportional fill      UIViewContentModeRedraw,               // redraw on bounds change  (this is Unclear)       uiviewcontentmodecenter,              //   Below is no stretch by position show     UIViewContentModeTop,     uiviewcontentmodebottom,    uiviewcontentmodeleft,     uiviewcontentmoderight,    uiviewcontentmodetopleft,    uiviewcontentmodetopright,    uiviewcontentmodebottomleft,     uiviewcontentmodebottomright,};</pre><p><p>Demo:https://github.com/vitoziv/vicmaimageview</p></p><p><p>2. UIImage Partial stretching</p></p><pre class="brush:cpp;toolbar: true; auto-links: false;"><pre class="brush:cpp;toolbar: true; auto-links: false;">Displays the non-stretched area by 4-side spacing-(UIImage *) resizableimagewithcapinsets: (uiedgeinsets) capinsets ns_available_ios (5_0); Stretch by 2 points-(UIImage *) stretchableimagewithleftcapwidth: (nsinteger) leftcapwidth topcapheight: (nsinteger) topcapheight ;</pre></pre><pre class="brush:cpp;toolbar: true; auto-links: false;"><pre class="brush:cpp;toolbar: true; auto-links: false;">-(UIImage *) resizableimagewithcapinsets: (uiedgeinsets) capinsets resizingmode: (uiimageresizingmode) resizingMode;/ /stretch mode typedef ns_enum (nsinteger, uiimageresizingmode) {uiimageresizingmodetile,//for Zone copy mode stretching uiimageresizingmodestre Tch,//the Gradient Copy Mode stretch};</pre></pre><p><p>3.UIImage Modify Size</p></p><pre class="brush:cpp;toolbar: true; auto-links: false;">Inside scaling, one becomes equal to the longest edge, the other is less than or equal to the longest edge-  (uiimage *) scaletosize: (cgsize) newsize {     cgfloat width = self.size.width;    cgfloat height=  self.size.height;    cgfloat newsizewidth = newsize.width;     CGFloat newSizeHeight= newSize.height;    if  (width <=  newSizeWidth &&        height <=  Newsizeheight)  {        return self;     }        if  (width == 0 | |  height == 0 | |  newsizeheight == 0 | |  newsizewidth == 0)  {        return nil;     }    CGSize size;    if  (Width / height > newsizewidth / newsizeheight)  {         size = cgsizemake (newsizewidth, newsizewidth * height /  width);     } else {        size  = cgsizemake (newsizeheight * width / height, newsizeheight);     }    return [self drawimagewithsize:size];} -  (uiimage *) drawimagewithsize:  (cgsize) size {    cgsize drawsize  = cgsizemake (floor (size.width),  floor (size.height));     Uigraphicsbeginimagecontext (drawsize);         [self drawinrect: CGRectMake (0, 0, drawsize.width, drawsize.height)];    uiimage * Newimage = uigraphicsgetimagefromcurrentimagecontext (); &NBsp;   uigraphicsendimagecontext ();     return newimage;} </pre><p><p><br></p></p><p><p>Several ways to stretch pictures in iOS</p></p></span>