摸索一下使用原生控件实现图文编辑，直接开搞。
首先搞个文本输入和选择图片的按钮:
@property (nonatomic, strong) UITextView * tv;
@property (nonatomic, strong) UIButton * selectImageBtn;
- (void)viewDidLoad
{
self.tv = [[UITextView alloc]initWithFrame:CGRectMake(0, 0, [UIScreen mainScreen].bounds.size.width-20, [UIScreen mainScreen].bounds.size.height / 2)];
self.tv.center = self.view.center;
self.tv.layer.cornerRadius = 4;
self.tv.layer.borderWidth = 1;
self.tv.delegate = self;
self.tv.layer.borderColor = [UIColor lightGrayColor].CGColor;
self.tv.returnKeyType = UIReturnKeyDefault;
[self.view addSubview:self.tv];
self.selectImageBtn = [UIButton buttonWithType:UIButtonTypeCustom];
//反正位置都是写死的，也懒得接布局三方，大概就是UITextView位于屏幕中间，UIButton水平居中，在UITextView下方距20
self.selectImageBtn.frame = CGRectMake([UIScreen mainScreen].bounds.size.width / 2 - 40, self.tv.frame.origin.y + [UIScreen mainScreen].bounds.size.height / 2 + 20, 80, 40);
[self.selectImageBtn setTitle:@"选择图片" forState:UIControlStateNormal];
self.selectImageBtn.layer.cornerRadius = 4;
[self.selectImageBtn setBackgroundColor:[UIColor grayColor]];
[self.selectImageBtn setTintColor:[UIColor whiteColor]];
[self.selectImageBtn addTarget:self action:@selector(selectImageButtonAction) forControlEvents:UIControlEventTouchUpInside];
self.selectImageBtn.titleLabel.font = [UIFont systemFontOfSize:14];
[self.view addSubview:self.selectImageBtn];
}OK,瞅一眼页面效果，应该是没错的:

但是发现这个光标的位置很尴尬啊~~~光标不都是在左上角么？
各种寻找解决办法，后来发现在- (void)viewDidLoad;里面加上这一句就好了:
self.automaticallyAdjustsScrollViewInsets = NO;但是这玩意儿到底是个啥？其实不必深究，但是好奇心作祟，找了找这玩意儿:

能看到这玩意儿的默认值是NO.
但是也没说这到底是干啥用的，看看它注释是啥:

啊哈~这回就知道了吧，就是说内部输入实际是一个scroll view，当内容填充不满控件的时候，它就给自动适配了，设置为NO，就是告诉他我自己来适配。不用你了，你就放到初始位置就行了。
纠结了好久，继续往下走~~
选择图片得用UIImagePickerController吧？OK，搞一个出来:
@property (nonatomic, strong) UIImagePickerController * imagePickerVC;然后出于安全性考虑，在UIImagePickerController弹出来之前，得先判断一下支不支持图片选择啊，搞一个布尔值用来判断支不支持选择图片的:
@property (nonatomic, assign) BOOL isPickerCanUsed;然后判断一下子，给isPickerCanUsed赋个值:
if ([UIImagePickerController isSourceTypeAvailable:UIImagePickerControllerSourceTypePhotoLibrary]) {
//支持图片选择
self.isPickerCanUsed = YES;
}else{
self.isPickerCanUsed = NO;
}完事咯，找个地方把UIImagePickerController的init方法塞进去,我是塞到了选择图片按钮的点击事件里面:
-(void)selectImageButtonAction{
if (self.isPickerCanUsed) {
//继续
if (!self.imagePickerVC) {
self.imagePickerVC = [[UIImagePickerController alloc]init];
}
self.imagePickerVC.sourceType = UIImagePickerControllerSourceTypePhotoLibrary;
self.imagePickerVC.allowsEditing = YES;
[self.imagePickerVC setDelegate:self];
NSMutableArray * mediaTypeArr = [[NSMutableArray alloc]init];
[mediaTypeArr addObject:(NSString *)kUTTypeImage];
[self.imagePickerVC setMediaTypes:mediaTypeArr];
[self.navigationController presentViewController:self.imagePickerVC animated:YES completion:nil];
}
}这里在对mediaTypeArr赋值的时候,kUTTypeImage会报错，Project -> Target ->Build Phases 添加 MobileCoreServices.framework,
然后引入#import <MobileCoreServices/MobileCoreServices.h> 这时候又出问题了，
[self.imagePickerVC setDelegate:self];
Sending 'ViewController * const__strong' to parameter of incompatible type 'id<UINavigationControllerDelegate,UIImagePickerControllerDelegate> _Nullable' UINavigationControllerDelegate,UIImagePickerControllerDelegate,搞定。
剩下的就好搞多了，实现代理方法就OK了:
//UIImagePickerController delegate
- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo{
//选中图片后添加到textView中
[self.imagePickerVC dismissViewControllerAnimated:YES completion:nil];
}
- (void)imagePickerControllerDidCancel:(UIImagePickerController *)picker{
//取消选择
[self.imagePickerVC dismissViewControllerAnimated:YES completion:nil];
}在- (void)imagePickerController:(UIImagePickerController *)picker didFinishPickingImage:(UIImage *)image editingInfo:(nullable NSDictionary<NSString *,id> *)editingInfo方法中就能获取到要添加的图片，但是加到哪里还无法确定，还需要在加一个UITextView的代理:UITextViewDelegate,然后实现代理方法中的- (void)textViewDidChangeSelection:(UITextView *)textView:
先:
@property (nonatomic, assign) int loc;//记录光标所在位置
@property (nonatomic, assign) int len;//记录选中文字长度，用来判断是否有选中状态（选中复制的操作的时候不为0）然后:
//UITextView Delegate
- (void)textViewDidChangeSelection:(UITextView *)textView{
_loc = (int)textView.selectedRange.location;
_len = (int)textView.selectedRange.length;
}这个方法在每次切换光标位置的时候都会调用。
然后在UIImagePickerController的didFinishPickingImage代理方法中:
//选中图片后添加到textView中
NSMutableAttributedString *string = [[NSMutableAttributedString alloc] initWithAttributedString:self.tv.attributedText];
NSTextAttachment *textAttachment = [[NSTextAttachment alloc] initWithData:nil ofType:nil] ;
textAttachment.image = image; //要添加的图片
NSAttributedString *textAttachmentString = [NSAttributedString attributedStringWithAttachment:textAttachment] ;
[string insertAttributedString:textAttachmentString atIndex:self.loc];//index为用户指定要插入图片的位置
self.tv.attributedText = string;
[self.imagePickerVC dismissViewControllerAnimated:YES completion:nil];到这基本就完事了，UIImagePickerController的页面中，取消和选择的按钮是英文，在Info.plist中设置Localization native development region为中文就OK了。
顺便提一下，如果想自定义UIImagePickerController页面里面的NavigationItem的按钮功能，可以实现UINavigationControllerDelegate中的方法:
//UINavigationController Delegate
- (void)navigationController:(UINavigationController *)navigationController willShowViewController:(UIViewController *)viewController animated:(BOOL)animated
{
UIButton *cancelBtn = [[UIButton alloc]initWithFrame:CGRectMake(0,0,50,30)];
[cancelBtn setTitle:@"取消" forState:(UIControlStateNormal)];
cancelBtn.backgroundColor = [UIColor clearColor];
[cancelBtn addTarget:self action:@selector(click) forControlEvents:(UIControlEventTouchUpInside)];
UIBarButtonItem *btn = [[UIBarButtonItem alloc] initWithCustomView:cancelBtn];
[viewController.navigationItem setRightBarButtonItem:btn animated:NO];
}
- (void)click{
[self imagePickerControllerDidCancel:self.imagePickerVC];
}如果想设置键盘弹出时视图上移，在- (void)viewDidLoad中设置监听:
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(keyBoardShowOrDissmiss:) name:UIKeyboardWillChangeFrameNotification object:nil];然后实现keyBoardShowOrDissmiss:方法:
-(void)keyBoardShowOrDissmiss:(NSNotification *)note{
NSLog(@"走你");
NSDictionary * info = note.userInfo;
//获取键盘弹出时的动画时间
CGFloat viewDuration = [info[@"UIKeyboardAnimationDurationUserInfoKey"] doubleValue];
//实时获取键盘的frame
CGRect keyFrame = [info[@"UIKeyboardFrameEndUserInfoKey"] CGRectValue];
//offsetY 是你需要调整的高度偏差，懒得计算啦
CGFloat moveY = offsetY;
NSLog(@"%.2f",moveY);
[UIView animateWithDuration:viewDuration animations:^{
self.view.transform = CGAffineTransformMakeTranslation(0, moveY);
}];
}
