textviewcontroller.m

iphone开发

/*

File: TextViewController.m
Abstract: The view controller for hosting the UITextView features of this
sample.

Version: 1.7

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*/

#import "TextViewController.h"
#import "CellTextView.h"
#import "SourceCell.h"
#import "Constants.h"


@implementation TextViewController

#define kUITextViewCellRowHeight 150.0

@synthesize myTableView;

- (id)init
{
	self = [super init];
	if (self)
	{
		// this title will appear in the navigation bar
		self.title = NSLocalizedString(@"TextViewTitle", @"");
	}
	
	return self;
}

- (void)dealloc
{
	[myTableView release];
	
	[super dealloc];
}

- (void)loadView
{
	// create and configure the table view
	myTableView = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame] style:UITableViewStyleGrouped];	
	myTableView.delegate = self;
	myTableView.dataSource = self;
	myTableView.scrollEnabled = NO; // no scrolling in this case, we don't want to interfere with text view scrolling
	myTableView.autoresizesSubviews = YES;
	
	self.view = myTableView;
}

- (UITextView *)create_UITextView
{
	CGRect frame = CGRectMake(0.0, 0.0, 100.0, 100.0);
   
	UITextView *textView = [[[UITextView alloc] initWithFrame:frame] autorelease];
    textView.textColor = [UIColor blackColor];
    textView.font = [UIFont fontWithName:kFontName size:kTextViewFontSize];
    textView.delegate = self;
    textView.backgroundColor = [UIColor whiteColor];
	
	textView.text = @"Now is the time for all good developers to come to serve their country.\n\nNow is the time for all good developers to come to serve their country.";
	textView.returnKeyType = UIReturnKeyDefault;
	textView.keyboardType = UIKeyboardTypeDefault;	// use the default type input method (entire keyboard)
	
	// note: for UITextView, if you don't like autocompletion while typing use:
	// myTextView.autocorrectionType = UITextAutocorrectionTypeNo;
	
	return textView;
}


#pragma mark UITextView delegate methods

- (void)textViewDidBeginEditing:(UITextView *)textView
{
	// provide my own Save button to dismiss the keyboard
	UIBarButtonItem* saveItem = [[UIBarButtonItem alloc] initWithBarButtonSystemItem:UIBarButtonSystemItemDone
															target:self action:@selector(saveAction:)];
	self.navigationItem.rightBarButtonItem = saveItem;
	[saveItem release];
}

- (void)saveAction:(id)sender
{
	// finish typing text/dismiss the keyboard by removing it as the first responder
	//
	UITableViewCell *cell = [myTableView cellForRowAtIndexPath:[NSIndexPath indexPathForRow:0 inSection:0]];

	[((CellTextView *)cell).view resignFirstResponder];
	self.navigationItem.rightBarButtonItem = nil;	// this will remove the "save" button
}


#pragma mark - UITableView delegates

// if you want the entire table to just be re-orderable then just return UITableViewCellEditingStyleNone
//
- (UITableViewCellEditingStyle)tableView:(UITableView *)tableView editingStyleForRowAtIndexPath:(NSIndexPath *)indexPath
{
	return UITableViewCellEditingStyleNone;
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
	return 1;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	return @"UITextView";
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
	return 2;
}

// to determine specific row height for each cell, override this.  In this example, each row is determined
// buy the its subviews that are embedded.
//
- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
	CGFloat result;
	
	switch ([indexPath row])
	{
		case 0:
		{
			result = kUITextViewCellRowHeight;
			break;
		}
		case 1:
		{
			result = kUIRowLabelHeight;
			break;
		}
	}

	return result;
}

// utility routine leveraged by 'cellForRowAtIndexPath' to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)obtainTableCellForRow:(NSInteger)row
{
	UITableViewCell *cell = nil;
	
	if (row == 0)
		cell = [myTableView dequeueReusableCellWithIdentifier:kCellTextView_ID];
	else if (row == 1)
		cell = [myTableView dequeueReusableCellWithIdentifier:kSourceCell_ID];
		
	if (cell == nil)
	{
		if (row == 0)
			cell = [[[CellTextView alloc] initWithFrame:CGRectZero reuseIdentifier:kCellTextView_ID] autorelease];
		else if (row == 1)
			cell = [[[SourceCell alloc] initWithFrame:CGRectZero reuseIdentifier:kSourceCell_ID] autorelease];
	}
	
	return cell;
}

// to determine which UITableViewCell to be used on a given row.
//
- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
	NSInteger row = [indexPath row];
	UITableViewCell *sourceCell = [self obtainTableCellForRow:row];
	
	// we are creating a new cell, setup its attributes
	if (row == 0)
	{
		// this cell hosts the UISwitch control
		((CellTextView *)sourceCell).view = [self create_UITextView];
	}
	else
	{
		// this cell hosts the info on where to find the code
		((SourceCell *)sourceCell).sourceLabel.text = @"TextViewController.m - create_UITextView";
	}
	
	return sourceCell;
}

@end