emoji表情demo

#import "ViewController.h"

#define LEFT_FACEKEYBOARD_GAP 20

#define UPDOWN_FACEKEYBOARD_GAP 20

#define LEFTRIGHT_FACEKEYBOARD_GAP 15

#define UP_FACEKEYBOARD_GAP 10

#define FACE_HEIGHT 27

#define FACE_WIDTH 27

@interface ViewController ()

@end

@implementation ViewController

- (void)viewDidLoad

{

    [super viewDidLoad];

    //初始化对应的表情对应输入码数组 22

    self.faceArray = [NSArray arrayWithObjects:@"",

                          @"\ue056",

                          @"\ue414",

                          @"\ue402",

                          @"\ue403",

                          @"\ue404",

                          @"\ue405",

                          @"\ue401",

                          @"\ue40b",

                          @"\ue40c",

                          @"\ue40d",

                          @"\ue40e",

                          @"\ue40f",

                          @"\ue410",

                          @"\ue411",

                          @"\ue409",

                          @"\ue408",

                          @"\ue407",

                          @"\ue406",

                          @"\ue412",

                          @"\ue413",

                          @"\ue415",

                          @"\ue417",nil];

    //输入区域TextView初始化

    self.inputFaceTextView = [[[UITextView alloc] initWithFrame:CGRectMake(0, 200, 320, 100)] autorelease];

    [self.view addSubview:self.inputFaceTextView];

    //键盘背景

    UIImageView *iv = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 320, 148)];

    iv.image = [UIImage imageNamed:@"faceKeyboard_background"];

    iv.userInteractionEnabled = YES;

    //表情键盘初始化

self.faceKeyboardScrollView = [[[UIScrollView alloc] initWithFrame:CGRectMake(0, 0, 320, 148)] autorelease];

    self.faceKeyboardScrollView.delegate = self;

    self.faceKeyboardScrollView.contentSize = CGSizeMake(320 * 4, 148);

    self.faceKeyboardScrollView.pagingEnabled = YES;

    self.faceKeyboardScrollView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"faceKeyboard_background"]];

    [iv addSubview:self.faceKeyboardScrollView];

    [self.view addSubview:iv];

    [iv release];

    //分页标示初始化

    self.pageControl = [[[UIPageControl alloc] initWithFrame:CGRectMake(0, 128, 320, 20)] autorelease];

    self.pageControl.numberOfPages = 4;

    self.pageControl.currentPage = 0;

    [self.pageControl addTarget:self action:@selector(chagePage:) forControlEvents:UIControlEventValueChanged];

    [self.view addSubview:self.pageControl];

    //键盘上增加表情按钮

    CGSize faceKeyboardSize = self.faceKeyboardScrollView.frame.size;

    for(int page = 0; page < 2;page++)

    {

        for(int i = 0; i < 3; i++)

        {

            for(int j = 0; j < 7;j++)

            {

                UIButton *deleteButton = nil;

                UIButton *faceButton = nil;

                int faceIndex = page*21 + i*7 + j + 1;

                

                if(faceIndex == 21 * (page + 1))

                {

                    deleteButton = [UIButton buttonWithType:UIButtonTypeCustom];

                    deleteButton.tag = 21;

                    [deleteButton setImage:[UIImage imageNamed:@"deleteface"] forState:UIControlStateNormal];

                    deleteButton.frame = CGRectMake(page*faceKeyboardSize.width +LEFT_FACEKEYBOARD_GAP+6*(FACE_WIDTH + LEFTRIGHT_FACEKEYBOARD_GAP) - 3,UP_FACEKEYBOARD_GAP + 2*(FACE_HEIGHT+UPDOWN_FACEKEYBOARD_GAP) + 2,FACE_WIDTH+ 5,FACE_HEIGHT - 3);

                    [deleteButton addTarget:self action:@selector(deleteButtonPressed:) forControlEvents:UIControlEventTouchUpInside];

                    [self.faceKeyboardScrollView addSubview:deleteButton];

                }

                else

                {

                    int facePageNameInt = page * 20 + i * 7 + j + 1;

                    NSString *faceName = [NSString stringWithFormat:@"%02d", facePageNameInt];

                    faceButton = [UIButton buttonWithType:UIButtonTypeCustom];

                    faceButton.tag = facePageNameInt + 100;

                    [faceButton addTarget:self action:@selector(faceButtonClicked:) forControlEvents:UIControlEventTouchUpInside];

                    [faceButton setImage:[UIImage imageNamed:faceName] forState:UIControlStateNormal];

                    faceButton.frame = CGRectMake(page*faceKeyboardSize.width +LEFT_FACEKEYBOARD_GAP+j*(FACE_WIDTH + LEFTRIGHT_FACEKEYBOARD_GAP) - 3,UP_FACEKEYBOARD_GAP + i*(FACE_HEIGHT+UPDOWN_FACEKEYBOARD_GAP) + 2,FACE_WIDTH,FACE_HEIGHT);

                    [self.faceKeyboardScrollView addSubview:faceButton];

                }

            }

        }

    }

}

- (void)faceButtonClicked:(UIButton *)btn

{

    int faceIdentifier = btn.tag - 100;

    NSString *tempFaceString;

    if(faceIdentifier < self.faceArray.count)

    {

        tempFaceString = [self.faceArray objectAtIndex:faceIdentifier];

        self.inputFaceTextView.text = [NSString stringWithFormat:@"%@%@",self.inputFaceTextView.text,tempFaceString];

    }

}

- (void)deleteButtonPressed:(UIButton *)deleteBtn

{

    NSInteger textViewLength = [self.inputFaceTextView.text length];

    NSInteger afterDeleteLength = textViewLength - 1;

    if(afterDeleteLength >= 0)

    {

        NSString *afterDeleteString = [self.inputFaceTextView.text substringToIndex:afterDeleteLength];

        self.inputFaceTextView.text = afterDeleteString;

    }

}

- (void)scrollViewDidScroll:(UIScrollView *)scrollView

{

    int pageIndex = (scrollView.contentOffset.x + 160) / 320;

    self.pageControl.currentPage = pageIndex;

    NSLog(@"scrollView = %d",pageIndex);

    [self.pageControl updateCurrentPageDisplay];

}

- (void)chagePage:(UIPageControl *)pageControl

{

    CGSize scrollViewSize = self.faceKeyboardScrollView.frame.size;

    CGRect scrollViewPageRect = CGRectMake(self.pageControl.currentPage * 320, 0, scrollViewSize.width, scrollViewSize.height);

    [self.faceKeyboardScrollView scrollRectToVisible:scrollViewPageRect animated:YES];

}

- (void)didReceiveMemoryWarning

{

    [super didReceiveMemoryWarning];

    // Dispose of any resources that can be recreated.

}

@end