基于这样的截图 分享之后
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效果图分享之后
分析：这是由三部分组成的 1.headerImageView(头部的控件) 2.midView(中间的控件) 3.footerImageView(下部的控件)下面来上代码
#import "ViewController.h" @interface ViewController ()<UIActionSheetDelegate> /** 头部 */ @property (nonatomic,strong) UIImageView *headerImageView; /** 中部 */ @property (nonatomic,strong) UIView *midView; /** 下部 */ @property (nonatomic,strong) UIImageView *footerImageView; @end @implementation ViewController -(UIImageView *)headerImageView{ if (_headerImageView == nil) { _headerImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"default_logo@3x.png"]]; _headerImageView.frame = CGRectMake(0, 0, self.view.frame.size.width, 200); } return _headerImageView; } -(UIView *)midView{ if (_midView == nil) { _midView = [[UIView alloc] initWithFrame:CGRectMake(0, CGRectGetMaxY(self.headerImageView.frame), self.view.frame.size.width, 200)]; [_midView setBackgroundColor:[UIColor colorWithPatternImage:[UIImage imageNamed:@"img_01@3x.png"]]]; } return _midView; } -(UIImageView *)footerImageView{ if (_footerImageView == nil) { _footerImageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"1487513280.png"]]; _footerImageView.frame = CGRectMake(0, CGRectGetMaxY(self.midView.frame), self.view.frame.size.width, 200); } return _footerImageView; } - (void)viewDidLoad { [super viewDidLoad]; // Do any additional setup after loading the view, typically from a nib. } -(void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event{ [self screenShot]; } -(void)screenShot{ UIActionSheet *actionsheet = [[UIActionSheet alloc] initWithTitle:@"保存图片到相册?" delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles: nil]; [actionsheet showInView:self.view]; actionsheet = nil; } //保存图片 - (void)actionSheet:(UIActionSheet *)actionSheet didDismissWithButtonIndex:(NSInteger)buttonIndex { if (buttonIndex != [actionSheet cancelButtonIndex] ) { [self.view addSubview:self.headerImageView]; UIImage *headerImage = [self screenShotWithSize:self.headerImageView.frame.size Layer:self.headerImageView.layer]; [self.headerImageView removeFromSuperview]; [self.view addSubview:self.midView]; UIImage *midImage = [self screenShotWithSize:self.midView.frame.size Layer:self.midView.layer]; [self.midView removeFromSuperview]; [self.view addSubview:self.footerImageView]; UIImage *footerImage = [self screenShotWithSize:self.footerImageView.frame.size Layer:self.footerImageView.layer]; [self.footerImageView removeFromSuperview]; UIImage *saveImage = [self addSlaveHeaderImage:headerImage toMasterMidImage:midImage toMasterFootImage:footerImage]; UIImageWriteToSavedPhotosAlbum(saveImage, self, nil, nil); } return; } /* * * slaveheaderImage 上边视图的图片，生成的图片的宽度为headerImageView的宽度 * mastermidImage 中间视图的图片，生成的图片的宽度为midView的宽度，拼接在headerImageView的下面 * masterfootImage 下边视图的图片，生成的图片的宽度为footerImageView的宽度，拼接在midView的下面 */ - (UIImage *)addSlaveHeaderImage:(UIImage *)slaveheaderImage toMasterMidImage:(UIImage *)mastermidImage toMasterFootImage:(UIImage *)masterfootImage{ CGSize size; size.width = slaveheaderImage.size.width; size.height = slaveheaderImage.size.height + mastermidImage.size.height + masterfootImage.size.height; UIGraphicsBeginImageContextWithOptions(size, YES, 0.0); //Draw slaveheaderImage [slaveheaderImage drawInRect:CGRectMake(0, 0, slaveheaderImage.size.width, slaveheaderImage.size.height)]; //Draw mastermidImage [mastermidImage drawInRect:CGRectMake(0, mastermidImage.size.height, mastermidImage.size.width, mastermidImage.size.height)]; //Draw masterfootImage [masterfootImage drawInRect:CGRectMake(0, slaveheaderImage.size.height+masterfootImage.size.height, masterfootImage.size.width, masterfootImage.size.height)]; UIImage *resultImage = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); return resultImage; } //截取定点位置屏幕图片 - (UIImage *)screenShotWithSize:(CGSize)size Layer:(CALayer *)layer{ UIImage* image = nil; /* *UIGraphicsBeginImageContextWithOptions有三个参数 *size bitmap上下文的大小，就是生成图片的size *opaque 是否不透明，当指定为YES的时候图片的质量会比较好 *scale 缩放比例，指定为0.0表示使用手机主屏幕的缩放比例 */ UIGraphicsBeginImageContextWithOptions(size, YES, 0.0); //此处我截取layer. [layer renderInContext: UIGraphicsGetCurrentContext()]; image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext(); if (image != nil) { return image; }else { return nil; } } - (void)didReceiveMemoryWarning { [super didReceiveMemoryWarning]; // Dispose of any resources that can be recreated. }项目地址
