iOS picture clipping

/*

-(ID) Initwithcoder: (Nscoder *) Adecoder

{

if (self = [Super Initwithcoder:adecoder]) {

set the main layer fillet of a picture

Self.iconView.layer.cornerRadius = 8;

set partial clipping beyond the main layer

Self.iconView.clipsToBounds = YES;

Self.iconView.layer.masksToBounds = YES;

NSLog (@ "Initwithcoder");

}

return self;

}

*/

-(void) awakefromnib

{

// set the main layer fillet of the picture

self. IconView. Layer. Cornerradius = 8;

// Set partial clipping beyond the main layer

self. IconView. Clipstobounds = YES;

}

#import "Uiimage+dy.h" @implementation UIImage (DY) + (Instancetype) Circleimagewithname: (NSString *) name BorderWidth: (        CGFloat) borderWidth bordercolor: (Uicolor *) bordercolor{//1. Loading the original image UIImage *oldimage = [UIImage imagenamed:name];    2. Open context CGFloat Imagew = oldImage.size.width + 2 * borderWidth;    CGFloat Imageh = oldImage.size.height + 2 * borderWidth;    Cgsize imageSize = Cgsizemake (Imagew, Imageh);        Uigraphicsbeginimagecontextwithoptions (ImageSize, NO, 0.0);        3. Get the current context cgcontextref CTX = Uigraphicsgetcurrentcontext ();    4. Draw the frame (great circle) [BorderColor set]; CGFloat Bigradius = Imagew * 0.5; Circle radius cgfloat CenterX = Bigradius;    Center CGFloat centery = Bigradius;    Cgcontextaddarc (CTX, CenterX, CenterY, Bigradius, 0, M_PI * 2, 0); Cgcontextfillpath (CTX);    Draw Circle//5. Small round cgfloat Smallradius = bigradius-borderwidth;    Cgcontextaddarc (CTX, CenterX, CenterY, Smallradius, 0, M_PI * 2, 0); Cropping (the things that are drawn later are affected by clipping) Cgcontextclip (CTx);        6. Drawing [Oldimage Drawinrect:cgrectmake (BorderWidth, BorderWidth, OldImage.size.width, OldImage.size.height)];        7. Take figure UIImage *newimage = Uigraphicsgetimagefromcurrentimagecontext ();        8. End context Uigraphicsendimagecontext (); return newimage;}

iOS picture clipping