controlsviewcontroller.m

iphone开发

/*

File: ControlsViewController.m
Abstract: The view controller for hosting the UIControls features of this
sample.

Version: 1.7

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*/

#import "ControlsViewController.h"
#import "Constants.h"
#import "DisplayCell.h"
#import "SourceCell.h"

@implementation ControlsViewController

@synthesize myTableView;

enum ControlTableSections
{
	kUISwitch_Section = 0,
	kUISlider_Section,
	kUISlider_Custom_Section,
	kUIPageControl_Section,
	kUIActivityIndicator_Section,
	kUIProgressView_Section
};

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

- (void)dealloc
{
	[myTableView setDelegate:nil];
	[myTableView release];
	
	[switchCtl release];
	[sliderCtl release];
	[customSlider release];
	[pageControl release];
	[progressInd release];
	[progressBar release];
	
	[super dealloc];
}

#pragma mark 
#pragma mark UISwitch 
#pragma mark
- (void)create_UISwitch
{
	CGRect frame = CGRectMake(0.0, 0.0, kSwitchButtonWidth, kSwitchButtonHeight);
	switchCtl = [[UISwitch alloc] initWithFrame:frame];
	[switchCtl addTarget:self action:@selector(switchAction:) forControlEvents:UIControlEventValueChanged];
	
	// in case the parent view draws with a custom color or gradient, use a transparent color
	switchCtl.backgroundColor = [UIColor clearColor];
}

- (void)switchAction:(id)sender
{
	// NSLog(@"switchAction: value = %d", [sender isOn]);
}

#pragma mark
#pragma mark UISlider
#pragma mark
- (void)create_UISlider
{
	CGRect frame = CGRectMake(0.0, 0.0, 120.0, kSliderHeight);
	sliderCtl = [[UISlider alloc] initWithFrame:frame];
	[sliderCtl addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
	
	// in case the parent view draws with a custom color or gradient, use a transparent color
	sliderCtl.backgroundColor = [UIColor clearColor];
	
	sliderCtl.minimumValue = 0.0;
	sliderCtl.maximumValue = 100.0;
	sliderCtl.continuous = YES;
	sliderCtl.value = 50.0;
}

#pragma mark
#pragma mark UISlider (Custom)
#pragma mark
- (void)create_Custom_UISlider
{
	CGRect frame = CGRectMake(0.0, 0.0, 120.0, kSliderHeight);
	customSlider = [[UISlider alloc] initWithFrame:frame];
	[customSlider addTarget:self action:@selector(sliderAction:) forControlEvents:UIControlEventValueChanged];
	// in case the parent view draws with a custom color or gradient, use a transparent color
	customSlider.backgroundColor = [UIColor clearColor];	
	UIImage *stetchLeftTrack = [[UIImage imageNamed:@"orangeslide.png"]
									stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
	UIImage *stetchRightTrack = [[UIImage imageNamed:@"yellowslide.png"]
									stretchableImageWithLeftCapWidth:10.0 topCapHeight:0.0];
	[customSlider setThumbImage: [UIImage imageNamed:@"slider_ball.png"] forState:UIControlStateNormal];
	[customSlider setMinimumTrackImage:stetchLeftTrack forState:UIControlStateNormal];
	[customSlider setMaximumTrackImage:stetchRightTrack forState:UIControlStateNormal];
	customSlider.minimumValue = 0.0;
	customSlider.maximumValue = 100.0;
	customSlider.continuous = YES;
	customSlider.value = 50.0;
}

- (void)sliderAction:(id)sender
{
}


#pragma mark
#pragma mark UIPageControl
#pragma mark
- (void)create_UIPageControl
{
	CGRect frame = CGRectMake(0.0, 0.0, kPageControlWidth, kPageControlHeight);
	pageControl = [[UIPageControl alloc] initWithFrame:frame];
	[pageControl addTarget:self action:@selector(pageAction:) forControlEvents:UIControlEventTouchUpInside];
		
	// in case the parent view draws with a custom color or gradient, use a transparent color
	pageControl.backgroundColor = [UIColor grayColor];
	
	pageControl.numberOfPages = 10;	// must be set or control won't draw
}

- (void)pageAction:(id)sender
{
	// NSLog(@"pageAction: current page = %d", [sender currentPage]);
}

#pragma mark
#pragma mark UIActivityIndicatorView
#pragma mark
- (void)create_UIActivityIndView:(UIActivityIndicatorViewStyle)style
{
	CGRect frame = CGRectMake(0.0, 0.0, kProgressIndicatorSize, kProgressIndicatorSize);
	progressInd = [[UIActivityIndicatorView alloc] initWithFrame:frame];
	[progressInd startAnimating];
	progressInd.activityIndicatorViewStyle = style;
	[progressInd sizeToFit];
	progressInd.autoresizingMask = (UIViewAutoresizingFlexibleLeftMargin |
									UIViewAutoresizingFlexibleRightMargin |
									UIViewAutoresizingFlexibleTopMargin |
									UIViewAutoresizingFlexibleBottomMargin);
}

#pragma mark
#pragma mark UIProgressView
#pragma mark
- (void)create_UIProgressView
{
	CGRect frame = CGRectMake(0.0, 0.0, kUIProgressBarWidth, kUIProgressBarHeight);
	progressBar = [[UIProgressView alloc] initWithFrame:frame];
	progressBar.progressViewStyle = UIProgressViewStyleDefault;
	progressBar.progress = 0.5;
}

- (void)loadView
{	
	// create and configure the table view
	myTableView = [[UITableView alloc] initWithFrame:[[UIScreen mainScreen] applicationFrame] style:UITableViewStyleGrouped];	
	myTableView.delegate = self;
	myTableView.dataSource = self;
	myTableView.autoresizesSubviews = YES;
	self.view = myTableView;
	
	[self create_UISwitch];
	[self create_UISlider];
	[self create_Custom_UISlider];
	[self create_UIPageControl];
	[self create_UIActivityIndView:UIActivityIndicatorViewStyleGray];
	[self create_UIProgressView];
}


#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 6;
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section
{
	NSString *title;
	switch (section)
	{
		case kUISwitch_Section:
		{
			title = @"UISwitch";
			break;
		}
		case kUISlider_Section:
		{
			title = @"UISlider";
			break;
		}
		case kUISlider_Custom_Section:
		{
			title = @"UISlider";
			break;
		}
		case kUIPageControl_Section:
		{
			title = @"UIPageControl";
			break;
		}
		case kUIActivityIndicator_Section:
		{
			title = @"UIActivityIndicatorView";
			break;
		}
		case kUIProgressView_Section:
		{
			title = @"UIProgressView";
			break;
		}
	}
	return title;
}

- (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 = kUIRowHeight;
			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:kDisplayCell_ID];
	else if (row == 1)
		cell = [myTableView dequeueReusableCellWithIdentifier:kSourceCell_ID];
	
	if (cell == nil)
	{
		if (row == 0)
			cell = [[[DisplayCell alloc] initWithFrame:CGRectZero reuseIdentifier:kDisplayCell_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 *cell = [self obtainTableCellForRow:row];
	
	switch (indexPath.section)
	{
		case kUISwitch_Section:
		{
			if (row == 0)
			{
				// this cell hosts the UISwitch control
				((DisplayCell *)cell).nameLabel.text = @"Standard Switch";
				((DisplayCell *)cell).view = switchCtl;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ControlsViewController.m - create_UISwitch";
			}
			break;
		}
		
		case kUISlider_Section:
		{
			if (row == 0)
			{
				// this cell hosts the UISlider control
				((DisplayCell *)cell).nameLabel.text = @"Standard Slider";
				((DisplayCell *)cell).view = sliderCtl;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ControlsViewController.m - create_UISlider";
			}
			break;
		}
		
		case kUISlider_Custom_Section:
		{
			if (row == 0)
			{
				// this cell hosts the custom UISlider control
				((DisplayCell *)cell).nameLabel.text = @"Customized Slider";
				((DisplayCell *)cell).view = customSlider;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ControlsViewController.m - create_Custom_UISlider";
			}
			break;
		}
		
		case kUIPageControl_Section:
		{
			if (row == 0)
			{
				// this cell hosts the UIPageControl control
				((DisplayCell *)cell).nameLabel.text = @"Ten Pages";
				((DisplayCell *)cell).view = pageControl;
			}
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ControlsViewController.m - create_UIPageControl";
			}
			break;
		}
		
		case kUIActivityIndicator_Section:
		{
			if (row == 0)
			{
				// this cell hosts the UIProgressIndicator control
				((DisplayCell *)cell).nameLabel.text = @"Style Gray";
				((DisplayCell *)cell).view = progressInd;	
			}						
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ControlsViewController.m - create_UIActivityIndView";
			}
			break;
		}
		
		case kUIProgressView_Section:
		{
			if (row == 0)
			{
				// this cell hosts the UIProgressIndicator control
				((DisplayCell *)cell).nameLabel.text = @"Style Default";
				((DisplayCell *)cell).view = progressBar;
			}						
			else
			{
				// this cell hosts the info on where to find the code
				((SourceCell *)cell).sourceLabel.text = @"ControlsViewController.m - create_UIProgressView";
			}
			break;
		}
	}
	
	return cell;
}

@end