BeePuzzle
蜜蜂拼图 https://github.com/iOSJYF/BeePuzzle
github地址:BeePuzzle
项目使用了cocospod,又设置了忽略文件,所以下载的时候请自行 pod install 一下
而且采用了之前蜜蜂的图片封装,详见 beeCustomPhoto
首先来一波效果图:
拼图默认是正方形的裁剪,所以一开始进去截图比例是1:1,默认横竖切割数一样,难度对应切割分别为3、4、5。
首页
- 对应控制器:ViewController
首先进行图片的选择之后,在代理方法里我对图片进行了压缩(如果不进行压缩,图片太大会导致显示卡顿,因为拼图界面是对图片进行切割,图片太大可能导致CPU负载过多而崩溃)
压缩方法如下:
#pragma mark - 压缩图片至指定大小
- (NSData *)beeCustomPic:(UIImage *)image ToCustomSize:(CGSize)size
{
CGSize mysize = size;
CGSize resize = image.size;
if(resize.width > mysize.width){
resize = CGSizeMake(mysize.width, mysize.width/resize.width * resize.height);
}
if(resize.height > mysize.height){
resize = CGSizeMake(mysize.height/resize.height * resize.width, mysize.height);
}
if (resize.width <= 0 || resize.height <= 0) return nil;
UIGraphicsBeginImageContextWithOptions(resize, NO, image.scale);
[image drawInRect:CGRectMake(0, 0, resize.width, resize.height)];
UIImage *newimage = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
NSData *data = UIImageJPEGRepresentation(newimage, 1);
return data;
}
拼图页面
- 对应控制器:BeeSlicingViewController
这里我用了collectionView 作为拼图的基础控件,在cololectionView上加手势来进行判断
首先对传过来的image进行相对应的切割
行数: kColumns
列数: kRows
总共 kNumbers 块拼图 kNumbers = kColumns * kRows
-(NSArray *)cutImage:(NSString *)imageName
{
NSMutableArray *array=[[NSMutableArray alloc]init];
UIImage *image = self.image;
for(int i=0;i<kNumbers;i++)
{
int row=i/kColumns;
int column=i%kColumns;
CGImageRef imageRef=CGImageCreateWithImageInRect(image.CGImage, CGRectMake(column*image.size.width/kColumns, row*image.size.height/kRows, image.size.width/kColumns, image.size.height/kRows));
UIImage *cutImage=[UIImage imageWithCGImage:imageRef];
[array addObject:cutImage];
}
return array;
}
此时通过调用此方法可以得到 kNumbers 个图片,collectionView 相对应的设置 kNumbers 个cell,然后对此数组进行打乱,赋值于cell
-(NSArray *)randomArray
{
NSMutableArray *startArray=[[NSMutableArray alloc]initWithArray:self.cutImageArray];
NSMutableArray *resultArray=[[NSMutableArray alloc] initWithCapacity:0];
NSInteger m=kNumbers;
for (int i=0; i<m; i++) {
int t=arc4random()%startArray.count;
resultArray[i]=startArray[t];
[startArray removeObjectAtIndex:t];
NSInteger theIndex = [self.cutImageArray indexOfObject:resultArray[i]];
[self.sxArray addObject:[NSNumber numberWithInteger:theIndex]];
}
return resultArray;
}
在此方法中,我记录当前for循环随机出来的元素属于第几个,然后放到sxArray中,这样可以得到随机数组的一个排序,用以判断顺序,如果最后该数组的排序跟以顺序排列的数组 TheNumArray 一样,则可以判断完成拼图
之后就是手势的操作了,先在collectionView上添加手势
UIPanGestureRecognizer *pan = [[UIPanGestureRecognizer alloc] initWithTarget:self action:@selector(changeLocation:)];
[self.collectionView addGestureRecognizer:pan];
手势对应操作
这里手势方法在你拖拉的时候会触发三次,分别为:
- UIGestureRecognizerStateBegan 点击
- UIGestureRecognizerStateChanged 拖拽
- UIGestureRecognizerStateEnded 放开
- 在 UIGestureRecognizerStateBegan 中,通过 point 拿到对应的 indexPath,定义开始的 indexPath 为 sourceIndexPath
- 在 UIGestureRecognizerStateChanged 中用拖拽后停下来的 indexPath 与 sourceIndexPath 做比较进行计算,直接调用 collectView 的方法
- (void)moveItemAtIndexPath:(NSIndexPath *)indexPath toIndexPath:(NSIndexPath *)newIndexPath;
用此方法进行cell的替换操作,本来蜜蜂认为这样就简单完事了,后来发现这样只能实现相邻row的一个替换,如果cell上下移动,实际上是相隔了好几个row,从而会导致顺序有点错乱,仔细研究了一下,发现这个方法其实是把前面的indexPath给remove然后在后面加上,而不是我们想要的A替换为B,B替换为A的操作,所以我在后面加了两个for循环处理,如果 sourceIndexPath 小于 indexPath,证明是向下滑动,会走进第一个for循环,我就反过来把indexPath一个个moveItem到sourceIndexPath的位置。同理可处理 sourceIndexPath 大于 indexPath 的情况,然后对sxArray进行一个排序更换,从而得到你排列的顺序
- 在 UIGestureRecognizerStateEnded 中将 sourceIndexPath 设为nil,并且对sxArray进行判断,如果排序跟 TheNumArray 一样,则拼图的顺序已经正确,
进行拼图成功操作
- (void)changeLocation:(id)sender
{
UIPanGestureRecognizer *pan = (UIPanGestureRecognizer *)sender;
UIGestureRecognizerState state = pan.state;
CGPoint point = [pan locationInView:self.collectionView];
NSIndexPath *indexPath = [self.collectionView indexPathForItemAtPoint:point];
static NSIndexPath *sourceIndexPath = nil; //手势开始的cell的indexPath
switch (state) {
case UIGestureRecognizerStateBegan:
{
if (indexPath)
{
sourceIndexPath = indexPath;
}
break;
}
case UIGestureRecognizerStateChanged:
{
//如果改变位置的cell存在 且与源cell位置不同 且2个cell处于同一个分区
if (indexPath && ![indexPath isEqual:sourceIndexPath] && indexPath.section == sourceIndexPath.section)
{
[self.collectionView moveItemAtIndexPath:sourceIndexPath toIndexPath:indexPath];
// 处理向下拖拽顺序错乱
for (int i = (int)indexPath.row-1; i > (int)sourceIndexPath.row; i --) {
NSIndexPath *index = [NSIndexPath indexPathForRow:i inSection:0];
NSIndexPath *index2 = [NSIndexPath indexPathForRow:i-1 inSection:0];
[self.collectionView moveItemAtIndexPath:index toIndexPath:index2];
}
// 处理向上拖拽顺序错乱
for (int i = (int)indexPath.row+1; i < (int)sourceIndexPath.row; i ++) {
NSIndexPath *index = [NSIndexPath indexPathForRow:i inSection:0];
NSIndexPath *index2 = [NSIndexPath indexPathForRow:i+1 inSection:0];
[self.collectionView moveItemAtIndexPath:index toIndexPath:index2];
}
int a = [self.sxArray[sourceIndexPath.row]intValue];
[self.sxArray removeObjectAtIndex:sourceIndexPath.row];
[self.sxArray insertObject:[NSNumber numberWithInt:a] atIndex:indexPath.row];
sourceIndexPath = indexPath;
}
break;
}
default:
{
sourceIndexPath = nil;
if ([self.sxArray isEqualToArray: self.TheNumArray]) {
[self doTheSuccess];
}
break;
}
}
}
新手开车,大神们多多指教~!