ios 点餐系统

这个程序的主要界面就是一个TabBarController。总共三个标签，第一个是所有的可点的菜，第二个是已点的菜，第三个是可以留言或者查看所有留言。

下面是第一个页面：

右上角的i按钮是添加新菜，每个cell中的order就是点餐咯，可以重复按多次。

首先说下这个列表的数据是存放在coredata中的，这个项目的coredata有两个实体，一个是dishes保存每一道菜的名字，id，价格，描述，菜系等。还有一个实体是type保存菜系。

这个项目用coredata的方式，正好是我想学的。

就是在新建项目的时候勾选use coredata，那么在appdelegate中就会出现与coredata响应的代码了，只需要根据自己的需要稍微修改即可。或者是自己在已有的项目中添加一个coredata文件，然后将一个已经勾选了use coredata的项目中的appdelagate中的一些代码复制过来即可。

那么在各个文件中我需要用到coredata的时候 要怎么操作呢？看下面的代码：

1. HotelAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
2. //connection
3. NSManagedObjectContext *context = [appDelegate managedObjectContext];
4. //table
5. NSEntityDescription *entityDescr =[NSEntityDescription entityForName:@"Dishes" inManagedObjectContext:context];
6. //query
7. NSFetchRequest *request = [[NSFetchRequest alloc] init];
8. [request setEntity:entityDescr];
9. //pred
10. //NSPredicate *pred = [NSPredicate predicateWithString:@"id=1"];
11. NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"typeid" ascending:YES];
12. NSArray *arraySortDescriptor = [[NSArray alloc] initWithObjects:nameDescriptor, nil];
13. [request setSortDescriptors:arraySortDescriptor];
14. [arraySortDescriptor release];
15. NSError *error;
16. //  NSManagedObject *aDish = nil;
17. //  NSNumber *id = [NSNumber numberWithInt:1];
18. NSArray *objects = [context executeFetchRequest:request error:&error];
19. if(objects != nil){
20. self.list = objects;
21. }

	HotelAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
	//connection
	NSManagedObjectContext *context = [appDelegate managedObjectContext];
	//table
	NSEntityDescription *entityDescr =[NSEntityDescription entityForName:@"Dishes" inManagedObjectContext:context];
	//query
	NSFetchRequest *request = [[NSFetchRequest alloc] init];
	[request setEntity:entityDescr];
	//pred
	//NSPredicate *pred = [NSPredicate predicateWithString:@"id=1"];

	NSSortDescriptor *nameDescriptor = [[NSSortDescriptor alloc] initWithKey:@"typeid" ascending:YES];
	NSArray *arraySortDescriptor = [[NSArray alloc] initWithObjects:nameDescriptor, nil];
	[request setSortDescriptors:arraySortDescriptor];
	[arraySortDescriptor release];

	NSError *error;
//	NSManagedObject *aDish = nil;
//	NSNumber *id = [NSNumber numberWithInt:1];
	NSArray *objects = [context executeFetchRequest:request error:&error];

	if(objects != nil){
		self.list = objects;
	}	

需要拿已存在于coredata中的文件的时候，就用上面的步骤就可以咯 拿到的数据就在最后的self.list中了

可以看到上面的tableView是自己绘制的，先看下面代码：

1. - (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {
2. NSUInteger row = [indexPath row];
3. NSManagedObject *theObj = [self.list objectAtIndex:row];
4. NSNumber *id = [theObj valueForKey:@"id"];
5. NSInteger typeid = [[theObj valueForKey:@"typeid"] intValue];
6. NSLog(@"tpyeid:%d",typeid);
7. static NSString *CellIdentifier = @"Cell";
8. UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
9. if (cell == nil) {
10. cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];
11. UIColor *elemBgColor = [UIColor clearColor];
12. UIImageView *img = [[UIImageView alloc] init];
13. img.frame = CGRectMake(kX, kY, kRowHeight -10, kRowHeight -10);
14. img.tag = kImage;
15. [cell.contentView addSubview:img];
16. [img release];
17. UILabel *nameLbl = [[UILabel alloc] initWithFrame:CGRectMake(65, 0, 100, 25)];
18. nameLbl.font = [UIFont systemFontOfSize:14];
19. nameLbl.tag = kName;
20. nameLbl.backgroundColor = elemBgColor;
21. [cell.contentView addSubview:nameLbl];
22. [nameLbl release];
23. UILabel *typeLbl = [[UILabel alloc] initWithFrame:CGRectMake(160, 0, 70, 25)];
24. typeLbl.font = [UIFont systemFontOfSize:14];
25. typeLbl.tag = kType;
26. typeLbl.backgroundColor = elemBgColor;
27. [cell.contentView addSubview:typeLbl];
28. [typeLbl release];
29. UILabel *priceLbl = [[UILabel alloc] initWithFrame:CGRectMake(240, 0, 50, 25)];
30. priceLbl.font =[UIFont systemFontOfSize:14];
31. priceLbl.tag = kPrice;
32. priceLbl.backgroundColor = elemBgColor;
33. [cell.contentView addSubview:priceLbl];
34. [priceLbl release];
35. UILabel *introLbl = [[UILabel alloc] initWithFrame:CGRectMake(60, 25, 160, 30)];
36. introLbl.tag = kIntro;
37. introLbl.backgroundColor = elemBgColor;
38. introLbl.numberOfLines = 2;
39. introLbl.textColor = [UIColor grayColor];
40. introLbl.font = [UIFont systemFontOfSize:12];
41. [cell.contentView addSubview:introLbl];
42. [introLbl release];
43. UILabel *btnBgLbl = [[UILabel alloc] initWithFrame:CGRectMake(230, 25, 60, 30)];
44. btnBgLbl.backgroundColor = elemBgColor;
45. [cell.contentView addSubview:btnBgLbl];
46. [btnBgLbl release];
47. UIButton *orderBtn = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
48. orderBtn.frame = CGRectMake(230, 32, 60, 20);
49. [orderBtn setTitle:@"order" forState:UIControlStateNormal];
50. [orderBtn addTarget:self action:@selector(order:) forControlEvents:UIControlEventTouchUpInside];
51. [cell.contentView addSubview:orderBtn];
52. }
53. cell.tag = 1 + [indexPath row];
54. TableCellView *cellView = [[TableCellView alloc] init];
55. cellView._count = [self.list count];
56. cellView._index = [indexPath row];
57. cell.backgroundView = cellView;
58. [cellView release];
59. NSString *imageName = [NSString stringWithFormat:@"%d.jpg",[id intValue]];
60. UIImageView *img = (UIImageView *)[cell.contentView viewWithTag:kImage];
61. img.image = [UIImage imageNamed:imageName];
62. UILabel *nameLbl = (UILabel *)[cell.contentView viewWithTag:kName];
63. nameLbl.text =  [theObj valueForKey:@"name"];//[list objectAtIndex:[indexPath row]];
64. UILabel *typeLbl = (UILabel *)[cell.contentView viewWithTag:kType];
65. typeLbl.text = [theObj valueForKey:@"type"];
66. UILabel *priceLbl = (UILabel *)[cell.contentView viewWithTag:kPrice];
67. NSNumber *nPrice = [theObj valueForKey:@"price"];
68. priceLbl.text = [NSString stringWithFormat:@"￥%d",[nPrice intValue]];
69. UILabel *introLbl = (UILabel *)[cell.contentView viewWithTag:kIntro];
70. NSString *introText = [theObj valueForKey:@"intro"];
71. if([introText length] > 70){
72. introText = [introText substringToIndex:70];
73. introText = [introText stringByAppendingString:@"..."];
74. }
75. introLbl.text = introText;
76. return cell;
77. }

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {

	NSUInteger row = [indexPath row];
	NSManagedObject *theObj = [self.list objectAtIndex:row];

	NSNumber *id = [theObj valueForKey:@"id"];
	NSInteger typeid = [[theObj valueForKey:@"typeid"] intValue];
	NSLog(@"tpyeid:%d",typeid);

    static NSString *CellIdentifier = @"Cell";

    UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier] autorelease];

	UIColor *elemBgColor = [UIColor clearColor];

	UIImageView *img = [[UIImageView alloc] init];
	img.frame = CGRectMake(kX, kY, kRowHeight -10, kRowHeight -10);
	img.tag = kImage;
	[cell.contentView addSubview:img];
	[img release];

	UILabel *nameLbl = [[UILabel alloc] initWithFrame:CGRectMake(65, 0, 100, 25)];
	nameLbl.font = [UIFont systemFontOfSize:14];
	nameLbl.tag = kName;
		nameLbl.backgroundColor = elemBgColor;
	[cell.contentView addSubview:nameLbl];
	[nameLbl release];

	UILabel *typeLbl = [[UILabel alloc] initWithFrame:CGRectMake(160, 0, 70, 25)];
	typeLbl.font = [UIFont systemFontOfSize:14];
	typeLbl.tag = kType;
		typeLbl.backgroundColor = elemBgColor;
	[cell.contentView addSubview:typeLbl];
	[typeLbl release];

	UILabel *priceLbl = [[UILabel alloc] initWithFrame:CGRectMake(240, 0, 50, 25)];
	priceLbl.font =[UIFont systemFontOfSize:14];
	priceLbl.tag = kPrice;
		priceLbl.backgroundColor = elemBgColor;
	[cell.contentView addSubview:priceLbl];
	[priceLbl release];

	UILabel *introLbl = [[UILabel alloc] initWithFrame:CGRectMake(60, 25, 160, 30)];
	introLbl.tag = kIntro;
	introLbl.backgroundColor = elemBgColor;
	introLbl.numberOfLines = 2;
	introLbl.textColor = [UIColor grayColor];
	introLbl.font = [UIFont systemFontOfSize:12];
	[cell.contentView addSubview:introLbl];
	[introLbl release];

	UILabel *btnBgLbl = [[UILabel alloc] initWithFrame:CGRectMake(230, 25, 60, 30)];
		btnBgLbl.backgroundColor = elemBgColor;
	[cell.contentView addSubview:btnBgLbl];
	[btnBgLbl release];

	UIButton *orderBtn = [[UIButton buttonWithType:UIButtonTypeRoundedRect] retain];
	orderBtn.frame = CGRectMake(230, 32, 60, 20);
	[orderBtn setTitle:@"order" forState:UIControlStateNormal];
	[orderBtn addTarget:self action:@selector(order:) forControlEvents:UIControlEventTouchUpInside];

	[cell.contentView addSubview:orderBtn];

    }
	cell.tag = 1 + [indexPath row];

	TableCellView *cellView = [[TableCellView alloc] init];
	cellView._count = [self.list count];
	cellView._index = [indexPath row];
	cell.backgroundView = cellView;
	[cellView release];

	NSString *imageName = [NSString stringWithFormat:@"%d.jpg",[id intValue]];
	UIImageView *img = (UIImageView *)[cell.contentView viewWithTag:kImage];
	img.image = [UIImage imageNamed:imageName];

	UILabel *nameLbl = (UILabel *)[cell.contentView viewWithTag:kName];
	nameLbl.text =  [theObj valueForKey:@"name"];//[list objectAtIndex:[indexPath row]];

	UILabel *typeLbl = (UILabel *)[cell.contentView viewWithTag:kType];
	typeLbl.text = [theObj valueForKey:@"type"];

	UILabel *priceLbl = (UILabel *)[cell.contentView viewWithTag:kPrice];
	NSNumber *nPrice = [theObj valueForKey:@"price"];
	priceLbl.text = [NSString stringWithFormat:@"￥%d",[nPrice intValue]];

	UILabel *introLbl = (UILabel *)[cell.contentView viewWithTag:kIntro];
	NSString *introText = [theObj valueForKey:@"intro"];
	if([introText length] > 70){
		introText = [introText substringToIndex:70];
		introText = [introText stringByAppendingString:@"..."];
	}
	introLbl.text = introText;
    return cell;
}

上面的代码中，由于坐着并没有为它的tableViewCell加一个id,所以当第一次创建cell的时候，是空的，需要自己定制，定制的过程就是把各个控件位置要放好，这个我没试过，所以对上面的坐标没什么感觉，这个需要多多尝试才知道。

这里要说的有几个点：（1）、tableViewCell有一个属性是contentView是用来容纳所有在他上面出现的控件的，自己绘制cell的时候，一定要把控件加上这个view上面，然后还有一个backgroundView是所有子view的最后面那个，在contentView上面。

（2）、本例中，cell的背景是自绘的，我不会，所以TableCellView类的代码看不太懂，有兴趣的朋友自己去研究下。

（3）、UIView有个属性tag,还有一个方法是viewWithTag.

tag是一个自己定义的常数，用来标记一个对象。viewWithTag方法呢，就是返回匹配给定的tag的view。

1. -(IBAction) add:(id)sender {
2. AddController *addC = [[AddController alloc] initWithNibName:@"AddController" bundle:nil];
3. [self.navigationController pushViewController:addC animated:YES];
4. //self.navigationController.navigationBarHidden = NO;
5. [addC release];
6. }

-(IBAction) add:(id)sender {
	AddController *addC = [[AddController alloc] initWithNibName:@"AddController" bundle:nil];
	[self.navigationController pushViewController:addC animated:YES];
	//self.navigationController.navigationBarHidden = NO;
	[addC release];
}

上面的代码是界面中右上角i按钮的响应方法，可以看到上面这种实现navigation跳转的方法是用push 对应的在返回的时候就用pop。这是在segue出现前的一个实现跳转的方法，现在的话 有了segue，就不用这样做咯。

这个就是按完i按钮后来到的添加新菜系的界面xib文件。

由于我主要是讲我的收获，所以在这个界面我只想讲怎么往coredata中添加新元组咯

1. -(IBAction) add:(id)sender {
2. if([name.text length]*[price.text length]*[type.text length]*[image.text length]*[intro.text length] == 0){
3. UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Attention" message:@"All fields needed!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
4. [alert show];
5. [alert release];
6. }else{
7. HotelAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
8. //connection
9. NSManagedObjectContext *context = [appDelegate managedObjectContext];
10. //table
11. NSEntityDescription *entityDescr =[NSEntityDescription entityForName:@"Dishes" inManagedObjectContext:context];
12. //query
13. NSFetchRequest *request = [[NSFetchRequest alloc] init];
14. [request setEntity:entityDescr];
15. //pred
16. //NSPredicate *pred = [NSPredicate predicateWithString:@"id=1"];
17. NSError *error;
18. NSManagedObject *aDish = nil;
19. NSNumber *id = [NSNumber numberWithInt:1];
20. NSArray *objects = [context executeFetchRequest:request error:&error];
21. if(objects != nil){
22. aDish = [objects lastObject];
23. id = [aDish valueForKey:@"id"];
24. id = [NSNumber numberWithInt:[id intValue]+1];
25. }
26. aDish = [NSEntityDescription insertNewObjectForEntityForName:@"Dishes" inManagedObjectContext:context];
27. [aDish setValue:id forKey:@"id"];
28. [aDish setValue:name.text forKey:@"name"];
29. [aDish setValue:[NSNumber numberWithInt:[price.text intValue]] forKey:@"price"];
30. [aDish setValue:type.text forKey:@"type"];
31. [aDish setValue:image.text forKey:@"image"];
32. [aDish setValue:intro.text forKey:@"intro"];
33. [request release];
34. [context save:&error];
35. [self clearFields];
36. }
37. }

-(IBAction) add:(id)sender {
	if([name.text length]*[price.text length]*[type.text length]*[image.text length]*[intro.text length] == 0){
		UIAlertView *alert = [[UIAlertView alloc] initWithTitle:@"Attention" message:@"All fields needed!" delegate:nil cancelButtonTitle:@"OK" otherButtonTitles:nil];
		[alert show];
		[alert release];
	}else{

		HotelAppDelegate *appDelegate = [[UIApplication sharedApplication] delegate];
		//connection
		NSManagedObjectContext *context = [appDelegate managedObjectContext];
		//table
		NSEntityDescription *entityDescr =[NSEntityDescription entityForName:@"Dishes" inManagedObjectContext:context];
		//query
		NSFetchRequest *request = [[NSFetchRequest alloc] init];
		[request setEntity:entityDescr];
		//pred
		//NSPredicate *pred = [NSPredicate predicateWithString:@"id=1"];

		NSError *error;
		NSManagedObject *aDish = nil;
		NSNumber *id = [NSNumber numberWithInt:1];
		NSArray *objects = [context executeFetchRequest:request error:&error];
		if(objects != nil){
			aDish = [objects lastObject];
			id = [aDish valueForKey:@"id"];
			id = [NSNumber numberWithInt:[id intValue]+1];

		}

		aDish = [NSEntityDescription insertNewObjectForEntityForName:@"Dishes" inManagedObjectContext:context];
		[aDish setValue:id forKey:@"id"];
		[aDish setValue:name.text forKey:@"name"];
		[aDish setValue:[NSNumber numberWithInt:[price.text intValue]] forKey:@"price"];
		[aDish setValue:type.text forKey:@"type"];
		[aDish setValue:image.text forKey:@"image"];
		[aDish setValue:intro.text forKey:@"intro"];
		[request release];
		[context save:&error];
		[self clearFields];
	}
}

上面的代码是add按钮的响应方法，看完就知道了咯。

、

这个界面要讲的就是view的动画。这个程序中，左右滑动，可以实现翻页，看上一道菜或下一道菜，这个对我来说很有用。

1. - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
2. //int count = [touches count];
3. //NSLog(@"count=%d",count);
4. UITouch *touch = [touches anyObject];
5. CGPoint location = [touch locationInView:self.view];
6. self.lastLoction = location;
7. moveChanged = NO;
8. }
9. - (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{
10. }
11. - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
12. CGPoint location = [[touches anyObject] locationInView:self.view];
13. lastLoction = location;
14. }
15. - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
16. UITouch *touch = [touches anyObject];
17. CGPoint location = [touch locationInView:self.view];
18. if(!moveChanged && fabs(location.x - lastLoction.x) > 60 && fabs(location.y - lastLoction.y) < 25){
19. moveChanged = YES;
20. [UIView beginAnimations:nil context:imageView];
21. [UIView setAnimationDuration:1.0];
22. [UIView setAnimationTransition:( location.x - lastLoction.x > 0? UIViewAnimationTransitionCurlUp : UIViewAnimationTransitionCurlDown) forView:self.view cache:YES];
23. [UIView setAnimationDelegate:self];
24. [UIView setAnimationDidStopSelector:@selector(onAnimationStop:finished:context:)];
25. [UIView commitAnimations];
26. NSUInteger count = [self.managedObjects count];
27. if(location.x - lastLoction.x >0){//right
28. if(currentRowIndex < count-1){
29. currentRowIndex = currentRowIndex +1;
30. }
31. }else{//left
32. if(currentRowIndex > 0){
33. currentRowIndex = currentRowIndex -1;
34. }
35. }
36. self.theObj = [self.managedObjects objectAtIndex:currentRowIndex];
37. NSNumber *id = [self.theObj valueForKey:@"id"];
38. NSLog(@"%d",[id intValue]);
39. NSLog(@"distance:%f",location.x - lastLoction.x);
40. self.imageView.image =  [UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",[id intValue]]];
41. NSMutableString *title = [[NSMutableString alloc] init];
42. [title appendString: [theObj valueForKey:@"name"]];
43. [title appendString:@"  "];
44. [title appendString:[theObj valueForKey:@"type"]];
45. NSNumber *price = [theObj valueForKey:@"price"];
46. [title appendString:[NSString stringWithFormat:@"￥%d",[price intValue]]];
47. self.nameLbl.text = title;
48. self.introText.text = [theObj valueForKey:@"intro"];
49. [title release];
50. NSDictionary *theRow = [FileController readRow:currentRowIndex];
51. NSUInteger orderCount = 0;
52. if(theRow != nil){
53. orderCount = [[theRow valueForKey:@"count"] intValue];
54. }
55. self.countLbl.text = [NSString stringWithFormat:@"%d",orderCount];
56. lastLoction = location;
57. }
58. }

- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event {
	//int count = [touches count];
	//NSLog(@"count=%d",count);
	UITouch *touch = [touches anyObject];
	CGPoint location = [touch locationInView:self.view];
	self.lastLoction = location;
	moveChanged = NO;
}
- (void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event{

}
- (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {
	CGPoint location = [[touches anyObject] locationInView:self.view];
	lastLoction = location;
}
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
	UITouch *touch = [touches anyObject];
	CGPoint location = [touch locationInView:self.view];
	if(!moveChanged && fabs(location.x - lastLoction.x) > 60 && fabs(location.y - lastLoction.y) < 25){
		moveChanged = YES;
		[UIView beginAnimations:nil context:imageView];
		[UIView setAnimationDuration:1.0];
		[UIView setAnimationTransition:( location.x - lastLoction.x > 0? UIViewAnimationTransitionCurlUp : UIViewAnimationTransitionCurlDown) forView:self.view cache:YES];
		[UIView setAnimationDelegate:self];
		[UIView setAnimationDidStopSelector:@selector(onAnimationStop:finished:context:)];
		[UIView commitAnimations];

		NSUInteger count = [self.managedObjects count];

		if(location.x - lastLoction.x >0){//right
			if(currentRowIndex < count-1){
				currentRowIndex = currentRowIndex +1;
			}
		}else{//left
			if(currentRowIndex > 0){
				currentRowIndex = currentRowIndex -1;
			}
		}

		self.theObj = [self.managedObjects objectAtIndex:currentRowIndex];
		NSNumber *id = [self.theObj valueForKey:@"id"];
		NSLog(@"%d",[id intValue]);
		NSLog(@"distance:%f",location.x - lastLoction.x);

		self.imageView.image =	[UIImage imageNamed:[NSString stringWithFormat:@"%d.jpg",[id intValue]]];

		NSMutableString *title = [[NSMutableString alloc] init];
		[title appendString: [theObj valueForKey:@"name"]];
		[title appendString:@"  "];
		[title appendString:[theObj valueForKey:@"type"]];
		NSNumber *price = [theObj valueForKey:@"price"];
		[title appendString:[NSString stringWithFormat:@"￥%d",[price intValue]]];
		self.nameLbl.text = title;
		self.introText.text = [theObj valueForKey:@"intro"];
		[title release];

		NSDictionary *theRow = [FileController readRow:currentRowIndex];
		NSUInteger orderCount = 0;
		if(theRow != nil){
			orderCount = [[theRow valueForKey:@"count"] intValue];
		}

		self.countLbl.text = [NSString stringWithFormat:@"%d",orderCount];

		lastLoction = location;
	}

}

1. [UIView beginAnimations:nil context:imageView];
2. [UIView setAnimationDuration:1.0];
3. [UIView setAnimationTransition:( location.x - lastLoction.x > 0? UIViewAnimationTransitionCurlUp : UIViewAnimationTransitionCurlDown) forView:self.view cache:YES];
4. [UIView setAnimationDelegate:self];
5. [UIView setAnimationDidStopSelector:@selector(onAnimationStop:finished:context:)];
6. [UIView commitAnimations];

		[UIView beginAnimations:nil context:imageView];
		[UIView setAnimationDuration:1.0];
		[UIView setAnimationTransition:( location.x - lastLoction.x > 0? UIViewAnimationTransitionCurlUp : UIViewAnimationTransitionCurlDown) forView:self.view cache:YES];
		[UIView setAnimationDelegate:self];
		[UIView setAnimationDidStopSelector:@selector(onAnimationStop:finished:context:)];
		[UIView commitAnimations];

截取的这几句代码就是一个动画的过程.

第二个标签是读取已经下单的菜，这个没什么好说的 和第一个标签的第一个页面很相似。

第三个界面是一个可以发表建议的界面，用到了segment controller来分两个界面，一个是写的 一个是看全部的历史建议的。

切换segmentController上面的标签时，会响应valueChange方法，可以在里面判断是要显示哪个界面。

POST请求的发送也可以再复习一下：

1. NSString *postMsg =[NSString stringWithFormat:@"user=%@&content=%@",self.name.text,self.textView.text];
2. NSData *postData = [postMsg dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
3. NSString *postLength = [NSString stringWithFormat:@"%d",[postData length]];
4. NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://bula.kilu.net/post.php"]];
5. [request setHTTPMethod:@"POST"];
6. [request setValue:postLength forHTTPHeaderField:@"Content-Length"];
7. [request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
8. [request setHTTPBody:postData];
9. [NSURLConnection connectionWithRequest:request delegate:self];

	NSString *postMsg =[NSString stringWithFormat:@"user=%@&content=%@",self.name.text,self.textView.text];
	NSData *postData = [postMsg dataUsingEncoding:NSUTF8StringEncoding allowLossyConversion:YES];
	NSString *postLength = [NSString stringWithFormat:@"%d",[postData length]];

	NSMutableURLRequest *request = [[NSMutableURLRequest alloc] initWithURL:[NSURL URLWithString:@"http://bula.kilu.net/post.php"]];
	[request setHTTPMethod:@"POST"];
	[request setValue:postLength forHTTPHeaderField:@"Content-Length"];
	[request setValue:@"application/x-www-form-urlencoded" forHTTPHeaderField:@"Content-Type"];
	[request setHTTPBody:postData];

	[NSURLConnection connectionWithRequest:request delegate:self];

好了 我学到的东西是这些，还有一些是我看不懂的 对于自己绘制一些view的方法我还是不会，需要补补。

源码我待会会上传，有兴趣的朋友下载去研究下咯 不错的学习资料。，如果运行的时候说差哪一张图片的什么 就随便放张进去文件夹里面然后按它说的给个名字就行了，不影响代码研究。

上传好了 源码地址：ios点餐系统