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一、前导程序
新建一个项目，在主控制器文件中实现以下几行代码，就能轻松的完成图片在视图中的平铺。
1 #import "YYViewController.h" 2 3 @interface YYViewController () 4 5 @end 6 7 @implementation YYViewController 8 9 - (void)viewDidLoad 10 { 11 [super viewDidLoad]; 12 13 UIImage *image = [UIImage imageNamed:@"me"]; 14 UIColor *color = [UIColor colorWithPatternImage:image]; 15 self.view.backgroundColor=color; 16 } 17 18 @end
效果：
二、实现信纸条纹的效果
1 // 2 // YYViewController.m 3 // 01-信纸条纹 4 // 5 // Created by 孔医己 on 14-6-11. 6 // Copyright (c) 2014年 itcast. All rights reserved. 7 // 8 9 #import "YYViewController.h" 10 11 @interface YYViewController () 12 13 @end 14 15 @implementation YYViewController 16 17 - (void)viewDidLoad 18 { 19 [super viewDidLoad]; 20 21 22 // 1.生成一张以后用于平铺的小图片 23 CGSize size = CGSizeMake(self.view.frame.size.width, 35); 24 // 开启图片上下文 25 UIGraphicsBeginImageContextWithOptions(size , NO, 0); 26 27 // 2.画矩形 28 CGContextRef ctx = UIGraphicsGetCurrentContext(); 29 CGFloat height = 35; 30 CGContextAddRect(ctx, CGRectMake(0, 0, self.view.frame.size.width, height)); 31 [[UIColor whiteColor] set]; 32 CGContextFillPath(ctx); 33 34 // 3.画线条 35 CGFloat lineWidth = 2; 36 CGFloat lineY = height - lineWidth; 37 CGFloat lineX = 0; 38 CGContextMoveToPoint(ctx, lineX, lineY); 39 CGContextAddLineToPoint(ctx，self.view.frame.size.width, lineY); 40 [[UIColor blackColor] set]; 41 CGContextStrokePath(ctx); 42 43 // 获得图片上下文 44 UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 45 UIColor *color = [UIColor colorWithPatternImage:image]; 46 self.view.backgroundColor=color; 47 } 48 49 @end
效果：
三、应用场景
完成一个简陋的电子书阅读器
代码：
1 // 2 // YYViewController.m 3 // 01-信纸条纹 4 // 5 // Created by apple on 14-6-11. 6 // Copyright (c) 2014年 itcast. All rights reserved. 7 // 8 9 #import "YYViewController.h" 10 11 @interface YYViewController () 12 13 @property (weak, nonatomic) IBOutlet UITextView *textview; 14 - (IBAction)perBtnClick:(UIButton *)sender; 15 - (IBAction)nextBtnClick:(UIButton *)sender; 16 @property(nonatomic,assign)int index; 17 @end 18 19 @implementation YYViewController 20 21 - (void)viewDidLoad 22 { 23 [super viewDidLoad]; 24 25 26 // 1.生成一张以后用于平铺的小图片 27 CGSize size = CGSizeMake(self.view.frame.size.width, 26); 28 UIGraphicsBeginImageContextWithOptions(size , NO, 0); 29 30 // 2.画矩形 31 CGContextRef ctx = UIGraphicsGetCurrentContext(); 32 CGFloat height = 26; 33 CGContextAddRect(ctx, CGRectMake(0, 0, self.view.frame.size.width, height)); 34 [[UIColor brownColor] set]; 35 CGContextFillPath(ctx); 36 37 // 3.画线条 38 39 CGFloat lineWidth = 2; 40 CGFloat lineY = height - lineWidth; 41 CGFloat lineX = 0; 42 CGContextMoveToPoint(ctx, lineX, lineY); 43 CGContextAddLineToPoint(ctx, 320, lineY); 44 [[UIColor blackColor] set]; 45 CGContextStrokePath(ctx); 46 47 48 UIImage *image = UIGraphicsGetImageFromCurrentImageContext(); 49 UIColor *color = [UIColor colorWithPatternImage:image]; 50 // self.view.backgroundColor = color; 51 self.textview.backgroundColor = color; 52 } 53 54 - (IBAction)perBtnClick:(UIButton *)sender { 55 self.index--; 56 self.textview.text = [NSString stringWithFormat:@"第%d页", self.index]; 57 CATransition *ca = [[CATransition alloc] init]; 58 ca.type = @"pageCurl"; 59 60 [self.textview.layer addAnimation:ca forKey:nil]; 61 62 } 63 64 - (IBAction)nextBtnClick:(UIButton *)sender { 65 self.index++; 66 self.textview.text=[NSString stringWithFormat:@"第%d页",self.index]; 67 CATransition *ca = [[CATransition alloc] init]; 68 ca.type = @"pageCurl"; 69 70 [self.textview.layer addAnimation:ca forKey:nil]; 71 } 72 @end
storyboard中的界面布局
实现的简单效果：
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原文地址：http://www.cnblogs.com/zengshuilin/p/5756311.html
