IOS to convert text into color text picture _ios

This article has written a text into a colorful picture of the function, input text to the text into a color text picture, you can choose a different font, gradient, first look at the effect.

Implementation mainly with Cagradientlayer gradient, first look at the upper display implementation code:

-(void) Setupcontentview {UIView *contentview = [[UIView alloc] Initwithframe:cgrectmake (0, ScreenWidth, ScreenHight
 -44-300)];
 [Self.view Addsubview:contentview]; UITapGestureRecognizer *tapgesture = [[UITapGestureRecognizer alloc] initwithtarget:self action: @selector (
 Tapgestureaction:)];
 [Contentview Addgesturerecognizer:tapgesture];
 Self.topcontentview = Contentview;

 Self.topContentView.backgroundColor = [Uicolor Clearcolor];
 Uilabel *label = [[Uilabel alloc] init];
 Label.numberoflines = 0;
 Label.text = @ "ABC";
 Label.frame = [self calculatecontextlabelframewithtitle:@ ' ABC '];
 Label.center = Cgpointmake (CONTENTVIEW.BOUNDS.SIZE.WIDTH/2, CONTENTVIEW.BOUNDS.SIZE.HEIGHT/2);
 Label.font = [Uifont fontwithname:self.fontnamearray[0] size:25];
 Label.textalignment = Nstextalignmentcenter;
 [Contentview Addsubview:label];
 Label.backgroundcolor = [Uicolor Clearcolor];

 Self.contentlabel = label;
 Self.gradientlayer = [Cagradientlayer layer]; Self.gradientLayer.frame =CGRectMake (label.frame.origin.x, LABEL.FRAME.ORIGIN.Y, Label.frame.size.width, label.frame.size.height); Self.gradientLayer.backgroundColor = [Uicolor Clearcolor].
 Cgcolor;
 Self.gradientLayer.startPoint = Cgpointmake (0,0.5);
 Self.gradientLayer.endPoint = Cgpointmake (1,0.5);
 Self.gradientLayer.colors = self.grandentarr[0];
 [Contentview.layer AddSublayer:self.gradientLayer];
 Self.gradientLayer.mask = Self.contentLabel.layer;
Self.contentLabel.frame = Self.gradientLayer.bounds;
 }

Recalculates the Self.gradientlayer frame when the input text changes

-(void) Textfieldtextchange: (nsnotification*) notice
{
 self.contentLabel.text = Self.textField.text;
 [Self recalculategradientlayerframe];
}

Implementation code in the following section:

-(void) Setupbottomview {uiview *bottomview =[[uiview alloc] Initwithframe:cgrectmake (0, ScreenHight-300, ScreenWidth,
 300)];
 Bottomview.backgroundcolor = Jgcolor (222, 222, 222);
 [Self.view Addsubview:bottomview];

 Self.bottomcontentview = Bottomview;
 UIView *textcontentview = [[UIView alloc] init];
 Textcontentview.frame = CGRectMake (0, 0, BottomView.bounds.size.width, 50);
 [Bottomview Addsubview:textcontentview];

 Textcontentview.backgroundcolor = Jgcolor (55, 44, 16);
 Uitextfield *textfield = [[Uitextfield alloc] init];
 Textfield.borderstyle = Uitextborderstyleroundedrect;
 Textfield.frame = CGRectMake (5, textcontentview.bounds.size.width-20, textcontentview.bounds.size.height-10);
 [Textcontentview Addsubview:textfield];

 Self.textfield = TextField;
 CGFloat orgy = 60;
 CGFloat ORGX = 10;
 CGFloat space = 10;
 CGFloat width = (SCREENWIDTH-ORGX * 2-3 * space)/4;

 CGFloat height = 35; for (int i = 0; i < i++) {UIView *VW = [[UIView alloc] InitwitHframe:cgrectmake (ORGX + (i% 4) * width + (i% 4) * spaces, orgy + (I/4) * height + (I/4) * space, width, height)];
  Vw.backgroundcolor = [Uicolor Clearcolor];
  Vw.tag = i + 1;

  [Self.bottomcontentview ADDSUBVIEW:VW]; UITapGestureRecognizer *tapgesture = [[UITapGestureRecognizer alloc] initwithtarget:self action: @selector (Viewtap:)]
  ;

  [VW Addgesturerecognizer:tapgesture];
  Uilabel *label = [[Uilabel alloc] initWithFrame:vw.bounds];
  Label.textalignment = Nstextalignmentcenter;
  Label.text = @ "ABC";
  Label.frame = Vw.bounds;
  Label.font = [Uifont fontwithname:self.fontnamearray[i% 4] size:25];
  Label.backgroundcolor = [Uicolor Clearcolor];

  [VW Addsubview:label];
  Cagradientlayer *grandient = [Cagradientlayer layer]; Grandient.frame = CGRectMake (label.frame.origin.x, LABEL.FRAME.ORIGIN.Y, Label.frame.size.width,
  Label.frame.size.height); Grandient.backgroundcolor = [Uicolor Clearcolor].
  Cgcolor;
  Grandient.startpoint = Cgpointmake (0,0.5); Grandient.enDpoint = Cgpointmake (1,0.5);
  Grandient.colors = Self.grandentarr[i/4];
  [Vw.layer addsublayer:grandient];
  Grandient.mask = Label.layer;
 Label.frame = Grandient.bounds;
 }
}

Code to convert text to a picture:

-(void) gettitleimg {uigraphicsbeginimagecontext (self.topContentView.frame.size);

 Cgcontextref context = Uigraphicsgetcurrentcontext (); if ([[[Uidevice currentdevice].systemversion Floatvalue] >= 7.0) {[Self.topcontentview drawviewhierarchyinrect:self
 . Topcontentview.frame Afterscreenupdates:yes];
 else {[Self.topContentView.layer renderincontext:context];
 } uiimage *img = Uigraphicsgetimagefromcurrentimagecontext ();

 Uigraphicsendimagecontext (); Cgimageref newimgref = Cgimagecreatewithimageinrect (img. Cgimage, CGRectMake (self.gradientlayer.frame.origin.x, SELF.GRADIENTLAYER.FRAME.ORIGIN.Y + 44,

 Self.gradientLayer.frame.size.width, Self.gradientLayer.frame.size.height));
 Uigraphicsbeginimagecontextwithoptions (Self.gradientLayer.frame.size, NO, [UIScreen Mainscreen].scale);

 context = Uigraphicsgetcurrentcontext ();
 CGCONTEXTTRANSLATECTM (context, 0, self.gradientLayer.frame.size.height);

 CGCONTEXTSCALECTM (context, 1,-1); Cgcontextdrawimage (Context, CGRectMake (0, 0, Self.gradientLayer.frame.size.width, self.gradientLayer.frame.size.height), newimgref);
 UIImage *newimg = Uigraphicsgetimagefromcurrentimagecontext ();

 Uigraphicsendimagecontext ();
 Alassetslibrary *library = [[Alassetslibrary alloc] init]; [Library toolWriteImageToSavedPhotosAlbum:newImg.CGImage Metadata:nil completionblock:^ (nsurl *asseturl, Nserror *
  Error {if (error) {Jglog (@ "write error");

} groupname:@ "album name";
 }

Core code as above, mainly applied to the Cagradientlayer, screenshots, the method of drawing.
The above is the entire content of this article, I hope to help you learn.