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1.在指定位置插入字符串:
NSMutableString *TextViewStr=[[NSMutableString alloc] initWithString:TextView.text]; [TextViewStr insertString:@"your strings" atIndex:TextView.selectedRange.location]; TextView.scrollEnabled=NO; TextView.text=theTvStr; theTV.scrollEnabled=YES;
2.获得行数(包括换行符也会计算在内):
CGSize size = [[self.TextView text] sizeWithFont:[self.TextView font]]; // 2. 取出文字的高度 int length = size.height; //3. 计算行数 int colomNumber = TextView.contentSize.height/length;
3.检测换行符:
- (BOOL)textView: (UITextView *)textview shouldChangeTextInRange: (NSRange)range replacementText: (NSString *)text { if ([text isEqualToString:@"\n"]) { NSLog(@"it is a row !!"); //... } return YES; }<pre name="code" class="objc"> self.textView = [[[UITextView alloc] initWithFrame:self.view.frame] autorelease]; //初始化大小并自动释放 self.textView.textColor = [UIColor blackColor];//设置textview里面的字体颜色 self.textView.font = [UIFont fontWithName:@"Arial" size:18.0];//设置字体名字和字体大小 self.textView.delegate = self;//设置它的委托方法 self.textView.backgroundColor = [UIColor whiteColor];//设置它的背景颜色 self.textView.text = @"Now is the time for all good developers to come to serve their country.\n\nNow is the time for all good developers to come to serve their country.";//设置它显示的内容 self.textView.returnKeyType = UIReturnKeyDefault;//返回键的类型 self.textView.keyboardType = UIKeyboardTypeDefault;//键盘类型 self.textView.scrollEnabled = YES;//是否可以拖动 self.textView.autoresizingMask = UIViewAutoresizingFlexibleHeight;//自适应高度 [self.view addSubview: self.textView];//加入到整个页面中
注释:
文本字段实现了 UITextInputTrait协议,其提供了7个属性来定义字段处理文本输入的方式:autocapitalizationType、 autocorrectionType、enablesReturnKeyAutomatically、keyboardAppearance、 keyboardType、returnKeyType、secureTextEntry。其它,当文本字段为空时,placeholder文本以浅灰色显示,提供一个用户提示。通过设置clearButtonMode可以指定是否以及何时显示清除按钮。
如果你的textview里不用回车键,可以把回车键当做退出键盘的响应键。
#pragma mark - UITextView Delegate Methods -(BOOL)textView:(UITextView *)textView shouldChangeTextInRange:(NSRange)range replacementText:(NSString *)text { if ([text isEqualToString:@"\n"]) { [textView resignFirstResponder]; return NO; } return YES; }