Image add watermark Effect

2. Create a UIImage object
4. UIImage *image = [UIImage imagenamed:@ "scene1.jpg"];
6. 1. Establish Bitmap Context
8. Uigraphicsbeginimagecontext (image.size);
10. 2. Draw the original image to the context
12. [Image drawinrect:cgrectmake (0, 0, Image.size.width, image.size.height)];
14. 3. Draw the watermark text to the context.
16. Watermark in lower left corner
18. CGRect textFrame = CGRectMake (0, image.size.height-40, 200, 40);
20. Set Watermark Text Properties
22. Uifont *font = [Uifont boldsystemfontofsize:30];
24. Nsmutableparagraphstyle *style = [[Nsmutableparagraphstyle alloc] init];
26. Style.alignment = Nstextalignmentcenter;
30. Uicolor *color = [Uicolor colorwithred:254.0/255 green:201.0/255 blue:21.0/255 alpha:1];
34. [Text Drawinrect:textframe withattributes:
36. @{nsfontattributename:font,
38. Nsforegroundcolorattributename:color,
40. Nsparagraphstyleattributename:style}];
42. 4. From the bitmap context to obtain a watermark after the picture.
44. UIImage *waterimage = Uigraphicsgetimagefromcurrentimagecontext ();
46. 5. Close Bitmap context.
48. Uigraphicsendimagecontext ();
50. 6. Return the captured picture
52. return waterimage;
58. This method is best to be independent of a single class, which can be done with just one type of method.

Image add watermark Effect