在開始之前先看下效果圖，是不是你想要的。
（1）首先在viewDidLoad中設定3個屬性：
self.edgesForExtendedLayout = UIRectEdgeNone;
self.extendedLayoutIncludesOpaqueBars = NO;
self.modalPresentationCapturesStatusBarAppearance = NO;
（2）然後擷取圖檔，将圖檔顯示在textView中：
#pragma mark - 相冊代理
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingMediaWithInfo:(NSDictionary<NSString *,id> *)info {
UIImage *image = [info objectForKey:@"UIImagePickerControllerOriginalImage"];
//圖檔儲存時每一張圖檔都要由一個名字，而相冊和拍照中傳回的info是不同的，但不管如何，都要想辦法給每張圖檔一個唯一的名字
if (picker.sourceType ==UIImagePickerControllerSourceTypePhotoLibrary) {
//擷取每張圖檔的id，用來作為儲存在沙盒中的檔案名
NSString *getsrc=[NSString stringWithFormat:@"%@",(NSString *)[info objectForKey:@"UIImagePickerControllerReferenceURL"]];
NSRange range={33,47};
self.imageName=[NSString stringWithFormat:@"%@.jpg",[getsrc substringWithRange:range]];
}
if (picker.sourceType == UIImagePickerControllerSourceTypeCamera) {
self.imageName=[NSString stringWithFormat:@"%@.jpg",[[[info objectForKey:@"UIImagePickerControllerMediaMetadata"] objectForKey:@"{Exif}"] objectForKey:@"DateTimeDigitized"]];
self.imageName = [self.imageName stringByReplacingOccurrencesOfString:@" " withString:@""];
}
NSString *identifierForVendor = [[UIDevice currentDevice].identifierForVendor UUIDString];
self.imageName = [NSString stringWithFormat:@"%@%u.jpg",identifierForVendor,BARandomData];
//儲存至沙盒
[self saveImage:image WithName:self.imageName];
//添加到附件中顯示圖檔
[self addImageTextAttachmentImage:image];
[self dismissModalViewControllerAnimated:YES];
waitingDialog = [[MBProgressHUD alloc] init];
[self.view addSubview:waitingDialog];
[((MBProgressHUD *)waitingDialog) show:YES];
[self dismissViewControllerAnimated:YES completion:^(void){
[self onPostData];
}];
[self onPostData];
[self.messageInputView becomeFirstResponder];
}
（3）對選中的圖檔進行截取大小，并重新設定textView的輸入位置
//添加到附件中儲存圖檔
- (void)addImageTextAttachmentImage:(UIImage *)image {
//适配螢幕寬度
UIImage *image1 = [image scaleToSize:CGSizeMake(MSW - 20, image.size.height * MSW / image.size.width)];
image = [self compressImage:image toMaxFileSize:0.2];
_image_h = image1.size.height;
_imageTextAttachment = [ImageTextAttachment new];
image=[_imageTextAttachment scaleImage:image withSize:CGSizeMake(MSW - 30,_image_h)];
//Set tag and image
_imageTextAttachment.image = image;
//Set image size
_imageTextAttachment.imageSize = CGSizeMake(MSW - 30,_image_h);
//Insert image image
[self.messageInputView.textStorage insertAttributedString:[NSAttributedString attributedStringWithAttachment:_imageTextAttachment]
atIndex:self.messageInputView.selectedRange.location];
//Move selection location
self.messageInputView.selectedRange = NSMakeRange(self.messageInputView.selectedRange.location + 1, self.messageInputView.selectedRange.length);
//設定輸入内容的設定
[self setInitLocation];
_imageTextAttachment.imageTag = ImageTag;
//如果圖檔存在，則添加删除按鈕
if (image != nil) {
//将圖檔添加到數組
[_itemArray addObject:image];
//在圖檔上增加删除按鈕
UIButton *deleteBtn = [UIButton buttonWithType:UIButtonTypeCustom];
deleteBtn.frame = CGRectMake(image.size.width - 20, _messageInputView.contentSize.height - _image_h - 10, 30, 30);
[deleteBtn setImage:[UIImage imageNamed:@"Cricle_Delete"] forState:UIControlStateNormal];
deleteBtn.imageEdgeInsets = UIEdgeInsetsMake(5, -5, 10, -5);
deleteBtn.tag = _itemArray.count;
[deleteBtn addTarget:self action:@selector(deleteImageFromChooseView:) forControlEvents:UIControlEventTouchUpInside];
[_messageInputView addSubview:deleteBtn];
//把圖檔的位置存在數組
NSUInteger length = self.messageInputView.textStorage.length;
[_imageLenthArray addObject:@(length)];
}
}
(4)最後，就是将所有的屬性字元串轉換成字元串，将圖檔位置周遊屬性字元串，然後用和背景約定好的字元串類型替換掉就好。比如我這裡和背景約定的是：圖檔的Url替換成{{p%lu}} 以下是兩種判斷方式，根據自己的需求即可。
#pragma mark - 将屬性字元串轉換成字元串
- (NSString *)textString
{
NSAttributedString *attStr = _messageInputView.attributedText;
NSMutableAttributedString *resutlAtt = [[NSMutableAttributedString alloc] initWithAttributedString:attStr];
__block NSUInteger index = 1;
__weak __typeof(self) weakSelf = self;
//枚舉出所有的附件字元串
__block NSUInteger base = 0;
[attStr enumerateAttribute:NSAttachmentAttributeName inRange:NSMakeRange(0, attStr.length)
options:0
usingBlock:^(id value, NSRange range, BOOL *stop) {
if (value && [value isKindOfClass:[ImageTextAttachment class]]) {
NSString *p = [NSString stringWithFormat:@"{{p%lu}}", (unsigned long)index];
[resutlAtt replaceCharactersInRange:NSMakeRange(range.location + base, range.length)
withString:p];
if ([weakSelf.url isEqualToString:@""] || weakSelf.url == nil) {
weakSelf.url = [NSString stringWithFormat:@"%@=%@", p, _imgUrlArray[index - 1]];
} else {
weakSelf.url = [NSString stringWithFormat:@"%@,%@=%@", weakSelf.url, p, _imgUrlArray[index - 1]];
}
base += p.length - 1;
index++;
}
}];
// [attStr enumerateAttributesInRange:NSMakeRange(0, attStr.length) options:NSAttributedStringEnumerationLongestEffectiveRangeNotRequired usingBlock:^(NSDictionary *attrs, NSRange range, BOOL *stop) {
//
// //NSTextAttachment value類型 key-NSAttachment 從字典中取得那一個圖檔
// //擷取目前替換字元串的長度
// __block NSUInteger base = 0;
// NSTextAttachment *textAtt = attrs[@"NSAttachment"];
// if (textAtt)
// {
// NSString *p = [NSString stringWithFormat:@"{{p%lu}}", (unsigned long)index];
// [resutlAtt replaceCharactersInRange:NSMakeRange(range.location + base, range.length)
// withString:p];
// if ([weakSelf.url isEqualToString:@""] || weakSelf.url == nil) {
//
// weakSelf.url = [NSString stringWithFormat:@"%@=%@", p, _imgUrlArray[index]];
// } else {
// weakSelf.url = [NSString stringWithFormat:@"%@,%@=%@", weakSelf.url, p, _imgUrlArray[index]];
//
// }
//
// base += p.length;
// index++;
//
// }
//
// }];
DLog(@"---resutlAtt.string----- %@", resutlAtt.string)
return resutlAtt.string;
}
（5）最後就大功告成了，你隻需要将最後拼接好的哪一個字元串傳給背景就好，然後在你需要顯示這個内容的地方。将所擷取的字元串轉換成屬性字元串就好，然後指派給textView的attributeText就好。
![UI控件之TextView[圖]](data:image/gif;base64,R0lGODlhAQABAIAAAP///wAAACwAAAAAAQABAAACAkQBADs=)