TextViewController.m

//
//  TextViewController.m
//  QQApiDemo
//
//  Created by Tencent on 12-5-16.
//  Copyright 2012年 Tencent. All rights reserved.
//

#import "TextViewController.h"

@implementation TextViewController

@synthesize delegate = _delegate;

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)didReceiveMemoryWarning
{
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];
    
    // Release any cached data, images, etc that aren't in use.
}

#pragma mark - View lifecycle

/*
// Implement loadView to create a view hierarchy programmatically, without using a nib.
- (void)loadView
{
}
*/

// Implement viewDidLoad to do additional setup after loading the view, typically from a nib.
- (void)viewDidLoad
{
    [super viewDidLoad];
    
    self.title = @"编辑文本消息";
    self.view.backgroundColor = [UIColor whiteColor];
    
    CGRect screenRect = [UIScreen mainScreen].bounds;
    CGRect textViewRect = CGRectMake(10, 10, screenRect.size.width - 10 * 2, 150);
    CGRect textLenLabelRect = CGRectMake(screenRect.size.width - 230, 130, 200, 30);
    
    _textView = [[UITextView alloc]initWithFrame:textViewRect];
	_textView.clipsToBounds = YES;
    _textView.text = @"你见，或者不见我\
    我就在那里\
    不悲不喜\
    你念，或者不念我\
    情就在那里\
    不来不去\
    你爱，或者不爱我\
    爱就在那里\
    不增不减\
    你跟，或者不跟我\
    我的手就在你手里\
    不舍不弃\
    来我的怀里\
    或者\
    让我住进你的心里\
    默然相爱\
    寂静欢喜";
	_textView.font = [UIFont systemFontOfSize:16];
	_textView.textAlignment = UITextAlignmentLeft;
	_textView.contentOffset = CGPointMake(0, 10);
	_textView.autocapitalizationType = UITextAutocapitalizationTypeNone;
	_textView.autocorrectionType = UITextAutocorrectionTypeYes;
	_textView.scrollEnabled = YES;
	_textView.scrollsToTop = YES;
	_textView.showsHorizontalScrollIndicator = YES;
	_textView.enablesReturnKeyAutomatically = YES;
    _textView.returnKeyType = UIReturnKeyDone;
	_textView.delegate = self;
    
	[self.view addSubview:_textView];
	[_textView becomeFirstResponder];
    
    _textLenLabel = [[UILabel alloc] initWithFrame:textLenLabelRect];
    _textLenLabel.text = @"0";
    _textLenLabel.textAlignment = UITextAlignmentRight;
    _textLenLabel.backgroundColor = [UIColor clearColor];
    [self.view addSubview:_textLenLabel];
    
    _textLenLabel.text = [NSString stringWithFormat:@"%d", [_textView.text length]];
    
    self.navigationItem.rightBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"完成" style:UIBarButtonItemStyleDone target:self action:@selector(doneAction:)] autorelease];
    self.navigationItem.leftBarButtonItem = [[[UIBarButtonItem alloc] initWithTitle:@"返回" style:UIBarButtonItemStyleDone target:self action:@selector(backAction:)] autorelease];
}

- (void)viewDidUnload
{
    [super viewDidUnload];
    
    [_textView release];
    [_textLenLabel release];
}

- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation
{
    // Return YES for supported orientations
    return (interfaceOrientation == UIInterfaceOrientationPortrait);
}

- (void)textViewDidChange:(UITextView *)textView
{
	int len = [textView.text length];
	_textLenLabel.text = [NSString stringWithFormat:@"%d", len];
}

- (void)doneAction:(id)sender
{    
    if(_delegate)
    {
        [_delegate onTextViewDone:_textView.text];
    }
}

- (void)backAction:(id)sender
{
    if(_delegate)
    {
        [_delegate onTextViewCancel];
    }
}

@end