只 一起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(70,CGRectGetHeight(self.view.bounds)/2,CGRectGetWidth(self.view.bounds) - 100, 30)];    _scrollView.showsHorizontalScrollIndicator = NO;    _scrollView.showsHorizontalScrollIndicator = NO;    _scrollView.bounces = NO;    _scrollView.layer.borderWidth = 1;    [self.view addSubview:_scrollView];        NSMutableAttributedString * attributedStr4 = [[NSMutableAttributedStringalloc]initWithString:@"请输入约会内容"];    [attributedStr4 addAttribute:NSForegroundColorAttributeName value:[UIColor grayColor] range:NSMakeRange(0, attributedStr4.length)];    _textField1 = [[UITextField alloc]initWithFrame:CGRectMake(0,7,CGRectGetWidth(self.view.bounds) - 100, 15)];    _textField1.textAlignment = NSTextAlignmentRight;    _textField1.text = @"";    _textField1.textColor = [UIColor grayColor];    _textField1.font = [UIFont fontWithName:@"Helvetica-Bold" size:13];    _textField1.attributedPlaceholder = attributedStr4;    [_textField1 addTarget:self action:@selector(textFieldEditChanged:)forControlEvents:UIControlEventEditingChanged];    [_scrollView addSubview:_textField1];    _scrollView.contentSize = CGSizeMake(CGRectGetWidth(_textField1.bounds),30);}- (void)textFieldEditChanged:(UITextField *)textField{    if (CGRectGetWidth(_textField1.bounds)  >=CGRectGetWidth(self.view.bounds) - 100) {        _scrollView.contentSize =CGSizeMake(CGRectGetWidth(_textField1.bounds),30);        NSLog(@"%.2f",_scrollView.contentSize.width);        if (_indextext != _textField1.text.length) {            [_textField1 sizeToFit];            [_scrollViewsetContentOffset:CGPointMake(CGRectGetWidth(_textField1.bounds) -CGRectGetWidth(_scrollView.bounds), 0) animated:NO];            _indextext = _textField1.text.length;        }    }    else {        _textField1.frame = CGRectMake(0, 7,CGRectGetWidth(self.view.bounds) - 100, 15);        [_scrollView setContentOffset:CGPointMake(0, 0) animated:NO];        _scrollView.contentSize = CGSizeMake(CGRectGetWidth(self.view.bounds) - 100,30);        _indextext = _textField1.text.length;            }    if (_textField1.text.length > 36) {        _textField1.text = [_textField1.text substringToIndex:36];    }    }@end

- (void)viewDidLoad{    [_textField addTarget:self action:@selector(textFieldEditChanged:) forControlEvents:UIControlEventEditingChanged];        [super viewDidLoad];}- (void)textFieldEditChanged:(UITextField *)textField{    NSLog(@"textField text : %@", [textField text]);}