只 一行显示可左右滚动的文本(UITextField中文限制)

//
//  ViewController.m
//  一行显示可滚动的文本
//
//  Created by apple on 15-5-8.
//  Copyright (c) 2015年 apple. All rights reserved.
//

#import "ViewController.h"

@interface ViewController () {
    UIScrollView *_scrollView;
    UITextField *_textField1;
    NSInteger _indextext;
}
@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    _scrollView = [[UIScrollViewalloc]initWithFrame:CGRectMake(,CGRectGetHeight(self.view.bounds)/,CGRectGetWidth(self.view.bounds) - , )];
    _scrollView.showsHorizontalScrollIndicator = NO;
    _scrollView.showsHorizontalScrollIndicator = NO;
    _scrollView.bounces = NO;
    _scrollView.layer.borderWidth = ;
    [self.view addSubview:_scrollView];

    NSMutableAttributedString * attributedStr4 = [[NSMutableAttributedStringalloc]initWithString:@"请输入约会内容"];
    [attributedStr4 addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:NSMakeRange(, attributedStr4.length)];
    _textField1 = [[UITextField alloc]initWithFrame:CGRectMake(,,CGRectGetWidth(self.view.bounds) - , )];
    _textField1.textAlignment = NSTextAlignmentRight;
    _textField1.text = @"";
    _textField1.textColor = [UIColor grayColor];
    _textField1.font = [UIFont fontWithName:@"Helvetica-Bold" size:];
    _textField1.attributedPlaceholder = attributedStr4;
    [_textField1 addTarget:self action:@selector(textFieldEditChanged:)forControlEvents:UIControlEventEditingChanged];
    [_scrollView addSubview:_textField1];
    _scrollView.contentSize = CGSizeMake(CGRectGetWidth(_textField1.bounds),);

}
- (void)textFieldEditChanged:(UITextField *)textField
{
    if (CGRectGetWidth(_textField1.bounds)  >=CGRectGetWidth(self.view.bounds) - ) {
        _scrollView.contentSize =CGSizeMake(CGRectGetWidth(_textField1.bounds),);
        NSLog(@"%.2f",_scrollView.contentSize.width);
        if (_indextext != _textField1.text.length) {
            [_textField1 sizeToFit];
            [_scrollViewsetContentOffset:CGPointMake(CGRectGetWidth(_textField1.bounds) -CGRectGetWidth(_scrollView.bounds), ) animated:NO];
            _indextext = _textField1.text.length;
        }
    }
    else {
        _textField1.frame = CGRectMake(, ,CGRectGetWidth(self.view.bounds) - , );
        [_scrollView setContentOffset:CGPointMake(, ) animated:NO];
        _scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.view.bounds) - ,);
        _indextext = _textField1.text.length;

    }
    if (_textField1.text.length > ) {
        _textField1.text = [_textField1.text substringToIndex:];
    }

}

@end

补1：我这方法其实很笨，大家有好的方法共享出来，共同进步！

补2：textfield加个状态监听器-限制中文

- (void)viewDidLoad
{
    [_textField addTarget:self action:@selector(textFieldEditChanged:) forControlEvents:UIControlEventEditingChanged];

    [super viewDidLoad];
}

- (void)textFieldEditChanged:(UITextField *)textField
{
    NSLog(@"textField text : %@", [textField text]);
}

这样，无论是字母还是中文，都能动态获取

上面的中文限制是有bug的当你一直输入拼音不选择汉子到一定数量汉字联想自动关闭了

修改后链接：

http://www.cnblogs.com/hxwj/p/4560229.html