获取tableView截取的多张图片
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
-(NSArray *)imagesArrForTableView{
//0.更新historyTableView的约束 选择学科的不能重复截图
[self.historyTalbelView mas_updateConstraints:^(MASConstraintMaker *make) {
make.top.mas_equalTo(self.view.mas_top);
}];
// 1.获取WebView的宽高
CGSize boundsSize = self.historyTalbelView.bounds.size;
//CGFloat boundsWidth = boundsSize.width;
CGFloat boundsHeight = boundsSize.height;
// 2.获取contentSize
CGSize contentSize = self.historyTalbelView.contentSize;
CGFloat contentHeight = contentSize.height;
// 3.保存原始偏移量，便于截图后复位
CGPoint offset = self.historyTalbelView.contentOffset;
// 4.设置最初的偏移量为(0,0);
[self.historyTalbelView setContentOffset:CGPointMake(0,0)];
NSMutableArray *images = [NSMutableArray array];
while (contentHeight > 0) {
// 5.获取CGContext 5.获取CGContext
if (contentHeight - boundsSize.height < 0) {
UIGraphicsBeginImageContextWithOptions(CGSizeMake(boundsSize.width, boundsSize.height-80), NO, 0.0);
CGContextRef ctx = UIGraphicsGetCurrentContext();
// 6.渲染要截取的区域
[self.view.layer renderInContext:ctx];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// 7.截取的图片保存起来
[images addObject:image];
}else{
UIGraphicsBeginImageContextWithOptions(boundsSize, NO, 0.0);
CGContextRef ctx = UIGraphicsGetCurrentContext();
// 6.渲染要截取的区域
[self.view.layer renderInContext:ctx];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
// 7.截取的图片保存起来
[images addObject:image];
}
CGFloat offsetY = self.historyTalbelView.contentOffset.y;
[self.historyTalbelView setContentOffset:CGPointMake(0, offsetY + boundsHeight)];
contentHeight -= boundsHeight;
}
// 8 tableView 恢复到之前的显示区域
[self.historyTalbelView setContentOffset:offset];
// CGFloat scale = [UIScreen mainScreen].scale;
// CGSize imageSize = CGSizeMake(contentSize.width * scale,
// (contentSize.height-80) * scale);
// 9.根据设备的分辨率重新绘制、拼接成完整清晰图片
// UIGraphicsBeginImageContext(imageSize);
// [images enumerateObjectsUsingBlock:^(UIImage *image, NSUInteger idx, BOOL *stop) {
// [image drawInRect:CGRectMake(0,scale * boundsHeight * idx,scale * image.size.width,scale * image.size.height)];
// }];
// UIImage *fullImage = UIGraphicsGetImageFromCurrentImageContext(); // 用这个方法是获取完整的tableView图片；
// UIGraphicsEndImageContext();
//10.更新historyTableView的约束
[self.historyTalbelView mas_updateConstraints:^(MASConstraintMaker *make) {
make.top.mas_equalTo(self.view.mas_top).offset(64);
}];
return images;
}
把多张图片转成PDF文件
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
- (NSString *)createPDF:(NSArray *)dataSource{
NSString *path = [NSHomeDirectory() stringByAppendingPathComponent:[NSString stringWithFormat:@"%@/%@",LOCAL_ERROROBOOK_PATH,self.vipId]];
NSString *pdfPath = [path stringByAppendingPathComponent:[NSString stringWithFormat:@"/%@", [self getFileName]]];
if ([self creatFile:path]) {
NSLog(@" --- 创建PDF路径成功 --- ");
}
// CGRectZero 表示默认尺寸，参数可修改，设置自己需要的尺寸
UIGraphicsBeginPDFContextToFile(pdfPath, CGRectZero, NULL);
CGRect pdfBounds = UIGraphicsGetPDFContextBounds();
CGFloat pdfWidth = pdfBounds.size.width;
CGFloat pdfHeight = pdfBounds.size.height;
for (UIImage *image in dataSource) { // NSData * imageData in dataSource
//UIImage *image = [UIImage imageWithData:imageData];
// 绘制PDF
UIGraphicsBeginPDFPage();
CGFloat imageW = image.size.width;
CGFloat imageH = image.size.height;
if (imageW <= pdfWidth && imageH <= pdfHeight)
{
CGFloat originX = (pdfWidth - imageW) / 2;
CGFloat originY = (pdfHeight - imageH) / 2;
[image drawInRect:CGRectMake(originX, originY, imageW, imageH)];
}
else
{
CGFloat width,height;
if ((imageW / imageH) > (pdfWidth / pdfHeight))
{
width = pdfWidth;
height = width * imageH / imageW;
}
else
{
height = pdfHeight;
width = height * imageW / imageH;
}
[image drawInRect:CGRectMake((pdfWidth - width) / 2, (pdfHeight - height) / 2, width, height)];
}
}
UIGraphicsEndPDFContext();
return pdfPath;
}
/**
* 文件名 2019.06.18 16:47-错误原题
*/
-(NSString *)getFileName{
NSString *dateString = [NSDate getDateStringByDate:[NSDate date]];
NSString *timeString = [NSDate getTimeWithSecondStringByDate:[NSDate date]];
NSString *typeString = @"WeekStudyReport";
NSString *fullFileName = [NSString stringWithFormat:@"%@ %@-%@-%@.pdf",dateString,timeString,typeString,self.selectSubjectName];
return fullFileName;
}
/**
* 创建文件路径
*/
-(BOOL)creatFile:(NSString*)filePath{
if (filePath.length==0) {
return NO;
}
NSFileManager *fileManager = [NSFileManager defaultManager];
if ([fileManager fileExistsAtPath:filePath]) {
return YES;
}
NSError *error;
BOOL isSuccess = [fileManager createDirectoryAtPath:filePath withIntermediateDirectories:YES attributes:nil error:&error];
if (error) {
NSLog(@"creat File Failed:%@",[error localizedDescription]);
}
if (!isSuccess) {
return isSuccess;
}
isSuccess = [fileManager createFileAtPath:filePath contents:nil attributes:nil];
return isSuccess;
}
相关文章参考：
将UIWebView分屏截取，然后将截取的图片拼接成一张图片。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
- (UIImage *)imageRepresentation{
CGSize boundsSize = self.bounds.size;
CGFloat boundsWidth = self.bounds.size.width;
CGFloat boundsHeight = self.bounds.size.height;
CGPoint offset = self.scrollView.contentOffset;
[self.scrollView setContentOffset:CGPointMake(0, 0)];
CGFloat contentHeight = self.scrollView.contentSize.height;
NSMutableArray *images = [NSMutableArray array];
while (contentHeight > 0) {
UIGraphicsBeginImageContext(boundsSize);
[self.layer renderInContext:UIGraphicsGetCurrentContext()];
UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
[images addObject:image];
CGFloat offsetY = self.scrollView.contentOffset.y;
[self.scrollView setContentOffset:CGPointMake(0, offsetY + boundsHeight)];
contentHeight -= boundsHeight;
}
[self.scrollView setContentOffset:offset];
UIGraphicsBeginImageContext(self.scrollView.contentSize);
[images enumerateObjectsUsingBlock:^(UIImage *image, NSUInteger idx, BOOL *stop) {
[image drawInRect:CGRectMake(0, boundsHeight * idx, boundsWidth, boundsHeight)];
}];
UIImage *fullImage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return fullImage;
}
将UIWebView从头，contentOffset = (0, 0)，开始截取webView.bounds.size.height高度的图片，然后将_webView可见区域下移继续截屏，这样将所有截取的图片按照顺序拼接，就能得到整个UIWebView显示内容的完整图片。
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
- (NSData *)PDFData{
UIViewPrintFormatter *fmt = [self viewPrintFormatter];
UIPrintPageRenderer *render = [[UIPrintPageRenderer alloc] init];
[render addPrintFormatter:fmt startingAtPageAtIndex:0];
CGRect page;
page.origin.x=0;
page.origin.y=0;
page.size.width=600;
page.size.height=768;
CGRect printable=CGRectInset( page, 50, 50 );
[render setValue:[NSValue valueWithCGRect:page] forKey:@"paperRect"];
[render setValue:[NSValue valueWithCGRect:printable] forKey:@"printableRect"];
NSMutableData * pdfData = [NSMutableData data];
UIGraphicsBeginPDFContextToData( pdfData, CGRectZero, nil );
for (NSInteger i=0; i < [render numberOfPages]; i++)
{
UIGraphicsBeginPDFPage();
CGRect bounds = UIGraphicsGetPDFContextBounds();
[render drawPageAtIndex:i inRect:bounds];
}
UIGraphicsEndPDFContext();
return pdfData;
}