UITextField自定义键盘 ---->> 添加光标

声明：此方法我在那里看见过，不是原创，忘记以前看见过的地址了，由于最近整理一下东西，觉得这个有必要blog 一下

光标 可以左右 移动

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//隐藏系统键盘
_inputTextField.inputView = [[UIView alloc]initWithFrame:CGRectZero];

1）BaseTextField 基类
1> 禁止粘贴 选择 等等

 -(BOOL)canPerformAction:(SEL)action withSender:(id)sender {
 UIMenuController menuController = [UIMenuController sharedMenuController];
 if (menuController) {
 [UIMenuController sharedMenuController].menuVisible = NO;
 }
 return NO;
 }
 

2> 第二种方法

 /
 //// if(action ==@selector(paste:))//禁止粘贴
 //// return NO;
 //// if(action ==@selector(select:))// 禁止选择
 //// return NO;
 //// if(action ==@selector(selectAll:))// 禁止全选
 //// return NO;
 ////
 //// return[super canPerformAction:action withSender:sender];
 //
 */
 

2）UITextField 的 category 主要实现
.h 这两个方法
//获取光标的位置

 
 
 
  
(NSRange) selectedRange;
 //设置光标位置
 
  
(void) setSelectedRange:(NSRange) range;
 

.m 文件

 
  
(NSRange) selectedRange{
 UITextPosition* beginning = self.beginningOfDocument;
 UITextRange* selectedRange = self.selectedTextRange;
 UITextPosition* selectionStart = selectedRange.start;
 UITextPosition* selectionEnd = selectedRange.end;
 const NSInteger location = [self offsetFromPosition:beginning toPosition:selectionStart];
 const NSInteger length = [self offsetFromPosition:selectionStart toPosition:selectionEnd];
 return NSMakeRange(location, length);
 }
 // 备注：UITextField必须为第一响应者才有效
 
  
(void) setSelectedRange:(NSRange) range {
 UITextPosition* beginning = self.beginningOfDocument;
 UITextPosition* startPosition = [self positionFromPosition:beginning offset:range.location];
 UITextPosition* endPosition = [self positionFromPosition:beginning offset:range.location + range.length];
 UITextRange* selectionRange = [self textRangeFromPosition:startPosition toPosition:endPosition];
 [self setSelectedTextRange:selectionRange];
 }
 

//使用的代码

 
 
import "ViewController.h"
 
 
import "UITextField+ExtentRange.h"
 
 
@interface ViewController ()
 {
 
 
__weak IBOutlet UITextField *_cardNumberTextField;
 
 
}
 @end
 @implementation ViewController
 
 
 
  
(void)viewDidLoad {
 [super viewDidLoad];
 _cardNumberTextField.contentVerticalAlignment = UIControlContentVerticalAlignmentCenter;
 [_cardNumberTextField becomeFirstResponder];
 _cardNumberTextField.delegate = self;
 _cardNumberTextField.inputView = [[UIView alloc]initWithFrame:CGRectZero];
 [_cardNumberTextField setSelectedRange:NSMakeRange(0, 0)];
 }
 
  
(IBAction)pp:(id)sender {
 UIButton *button = (UIButton *)(sender);
 //获取光标的位置
 NSRange range = [_cardNumberTextField selectedRange];
 //添加
 [_cardNumberTextField insertText:button.titleLabel.text];
 //设置光标位置
 [_cardNumberTextField setSelectedRange:NSMakeRange(range.location + 1, 0)];
 }
 
  
 
(IBAction)deleteStr:(id)sender {
 if (_cardNumberTextField.text.length < 1 || [_cardNumberTextField.text isEqualToString:@""]) {
 return;
 }
 
NSRange range = [_cardNumberTextField selectedRange];
 if (range.location == 0) {
 if (_cardNumberTextField.text.length > 0) {
 [_cardNumberTextField setSelectedRange:NSMakeRange(_cardNumberTextField.text.length, 0)];
 
      NSRange range2 = [_cardNumberTextField selectedRange];
      [_cardNumberTextField deleteBackward];
      range2.location-=1;
      [_cardNumberTextField setSelectedRange:NSMakeRange(range2.location, 0)];
      
      return;
  }else{
      return;
  }
 
}
 [_cardNumberTextField deleteBackward];
 range.location-=1;
 [_cardNumberTextField setSelectedRange:NSMakeRange(range.location, 0)];
 }