小编iPh*_*lly的帖子

作为Objective-C的新手,有人可以按照@property指令给我一个概述保留,分配,复制和我缺少的任何其他内容吗？他们在做什么,为什么我要用另一个？

这是我在标题上工作的方式.

  //    viewDidLoad

  [self.collectionView registerClass:[UICollectionViewCell class]forCellWithReuseIdentifier:@"Cell"];

[self.collectionView registerClass:[UICollectionReusableView class] forSupplementaryViewOfKind:UICollectionElementKindSectionHeader withReuseIdentifier:@"header"];

UICollectionViewFlowLayout *layout= [[UICollectionViewFlowLayout alloc]init];

self.collectionView = [[UICollectionView alloc]initWithFrame:CGRectMake(0, 0, 390, 300) collectionViewLayout:layout];
layout.collectionView.backgroundColor = [UIColor colorWithRed:230.0/255.0 green:230.0/255.0 blue:230.0/255.0 alpha:1.0];
[self.collectionView registerClass:[UICollectionViewCell class]
        forCellWithReuseIdentifier:@"Cell"];
self.collectionView.delegate=self;
self.collectionView.dataSource=self;
layout.minimumInteritemSpacing = 15;

[layout setScrollDirection:UICollectionViewScrollDirectionVertical];

self.collectionView.collectionViewLayout = layout;
self.collectionView.showsHorizontalScrollIndicator = NO;
self.collectionView.showsVerticalScrollIndicator = NO;
[self.collectionView setBounces:YES];
self.collectionView.allowsMultipleSelection = YES;
[self.collectionView registerClass:[UICollectionViewCell class] forCellWithReuseIdentifier:@"HorizontalPickerCell"];
[self.view addSubview:self.collectionView];

   - (CGSize)collectionView:(UICollectionView *)collectionView layout:(UICollectionViewLayout*)collectionViewLayout referenceSizeForHeaderInSection:(NSInteger)section
  {
  if (section == 0) {
    return CGSizeMake(0, kHeaderHeight);
  }
  return CGSizeMake(0, kHeaderHeight + …

我想在它的点击上展开tableview单元格.有一个tableview,其中两个单元格是可扩展的,而另一些则不是.当我点击可扩展单元格时,它需要显示它下面的单元格,再次点击它应该隐藏.下面有一张图片来定义这个.

如何实现此功能,请指导以上内容.提前致谢.

我想在页面视图控制器中获取当前的视图控制器.怎么做 是否有一些代表打电话或什么.

我之前看过一些帖子,但还没有得到答案,这就是为什么我想以更有效的方式再次发帖.如何在UITableView下面的图像中使用check-uncheck功能.

这是我想要的表格,当我点击任何单元格的按钮时,按钮图像将改变,而不是所有单元格.

我想UICollectionView在数组中添加选定的单元格,在不同的数组中分段,表示每个部分的不同数组.问题在于这些部分是动态的.以下是我的代码.

- (void)collectionView:(UICollectionView *)collectionView didSelectItemAtIndexPath:(NSIndexPath *)indexPath
{
    NSString *seatV;
    int cs;

    NSString *secVal = [arrSeatSel objectAtIndex:indexPath.section];
    NSArray *arrSplit = [secVal componentsSeparatedByString:@":"];
    seatV = [arrSplit objectAtIndex:1];
    cs = [seatV integerValue];

    int v;
    NSString *cnt = [NSString stringWithFormat:@"%@",[arrTot objectAtIndex:indexPath.section]];
    v = [cnt intValue];

    NSString *sect = [NSString stringWithFormat:@"%d", indexPath.section];

    if(indexPath.item < v)
    {
        if([sectionInfo count] < cs)
        {
            itemPaths = [self.collectionView indexPathsForSelectedItems];

            sectionInfo = [NSMutableArray arrayWithArray: [self.collectionView indexPathsForSelectedItems]];
            [selectedItemsInfo setObject:sectionInfo forKey:sect];
            cell=[self.collectionView cellForItemAtIndexPath:indexPath];
            cell.contentView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"yellow_seat.png"]];                    
        }

        else …

我试图NSDictionary按升序排序.我正在使用此代码:

NSDictionary *valDict = self.mGetDataDict[key][rowKey];

for (NSString *valueKey in
     [[valDict allKeys] sortedArrayUsingSelector:@selector(compare:)])
{                
    if ([valueKey isEqualToString:@"attr"])
    {
        dictRow = self.mGetDataDict[key][rowKey][valueKey];
    }
    else {
        NSString *valKey = self.mGetDataDict[key][rowKey][valueKey];
        [arrSeatsStatus addObject:valKey];
    }
}

这是我得到的输出:

1 = off;
10 = off;
2 = on;
3 = on;
4 = on;
5 = on;
6 = on;
7 = on;
8 = on;
9 = on;

这是必需的输出:

1: "off",
2: "on",
3: "on",
4: "on",
5: "on",
6: "on",
7: "on",
8: …

如何检查数组中重复的时间项数.我有一个包含重复项的数组.下面是数组.

"Family:0",
"Family:0",
"Family:0",
"Gold:3",
"Gold:3"

所以,我希望各个项目的响应值为3和2.我怎样才能做到这一点.希望我明白我的观点.如果有什么不清楚请问.

以下是我试过的代码.

int occurrences = 0;
int i=0;
for(NSString *string in arrTotRows){
    occurrences += ([string isEqualToString:[arrTotRows objectAtIndex:indexPath.section]]); //certain object is @"Apple"
    i++;
}

试图在NSMutableArray中获取对象的索引.它返回一些垃圾值,而不是为什么它不返回特定项的索引.以下是我试过的代码.

NSString *type = [dictRow valueForKey:@"type"];

if([arrSeatSel indexOfObject:type])
{
    NSUInteger ind = [arrSeatSel indexOfObject:type];
    [arrTotRows addObject:[arrSeatSel objectAtIndex:ind]];
}

type包含值"Gold".并且arrSeatSel包含

 (
"Gold:0",
"Silver:0",
"Bronze:1"

怎么检查.请指导.

我正在使用MHRotaryKnob来制作像动画一样的旋转拨号.我用它来制作旧的电话拨号盘.
图像.
目前它只是显示动画,当我拨打它刚刚回来的动画片.即使第一个圆圈从较低甚至没有检测到触摸,触摸也在那里工作,没有圆圈拨号.下面我发布我正在使用的代码.

 - (BOOL)beginTrackingWithTouch:(UITouch *)touch withEvent:(UIEvent *)event
 {
CGPoint point = [touch locationInView:self];

if (self.interactionStyle == MHRotaryKnobInteractionStyleRotating)
{
    // If the touch is too close to the center, we can't calculate a decent
    // angle and the knob becomes too jumpy.
    if ([self squaredDistanceToCenter:point] < MinDistanceSquared)
        return NO;

    // Calculate starting angle between touch and center of control.
    _angle = [self angleBetweenCenterAndPoint:point];
}
else
{
    _touchOrigin = point;
    _angle = [self angleForValue:self.value];
}

self.highlighted = YES;
[self showHighlighedKnobImage]; …