UITextField 光标的位置设置获取

UITextField 光标的位置设置获取

通过给UITextField 加一个拓展

//#import "UITextField+ExtentRange.h"

#import <UIKit/UIKit.h>

@interface UITextField (ExtentRange)

- (NSRange) selectedRange;

- (void) setSelectedRange:(NSRange) range;

@end

// #import "UITextField+ExtentRange.m"

#import "UITextField+ExtentRange.h"

@implementation UITextField (ExtentRange)

- (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);

}

- (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];

}

@end