ios - iOS: setContentSize が原因で UIScrollView フレーム全体がジャンプする

Question

私が見逃しているこの問題にはおそらく簡単な解決策がありますが、原因を見つけることができないようです。

問題:スクロールビューで setContentSize を呼び出すたびに、スクロールビューフレーム全体が移動します。

質問: setContentSize が呼び出されるたびにその位置がリセットされるのはなぜですか? どうすればそれを止めることができますか？

ノート：

Scrollview 内の contentOffSet は問題ありません。元の位置にジャンプするのはスクロールビューフレーム全体です。
スクロールビューは、ボタンを押すと上下に移動し、その下にある UIView が表示されるようになっています。-- これは正常に動作しますが、セルが開かれ、CollapseClick がそれ自体 (スクロールビュー) で setContentSize を呼び出すと、スクロールビュー全体が途中で元に戻ります。
アドバイスをいただければ幸いです。ありがとう。

レイアウト：

シンプルなレイアウト: 1 つの scrollview (フルスクリーン)、1 つの UIView コンテナー (高さ: 120 ポイント) は、Scrollview が上下に移動すると表示および非表示になります。

ここに画像の説明を入力

MasterView.m (部分)

-(void)showPostShout{
    CGRect newCCFrame = myCollapseClick.frame;//<----myCollapseClick is the UIScrollView

    if (!postShoutOpen) {
        newCCFrame.origin.y += 120;
        [UIView animateWithDuration:.4 delay:0  options:UIViewAnimationOptionCurveEaseInOut animations:^{
            self.postShoutContainer.alpha = 1;
            myCollapseClick.frame= newCCFrame;

        } completion: ^(BOOL finished){
            NSLog(@"finished!");
        }];
    } else{
        newCCFrame.origin.y -= 120;
        [UIView animateWithDuration:.3 delay:0 options:UIViewAnimationOptionCurveEaseInOut animations:^{
            self.postShoutContainer.alpha = 0;
            myCollapseClick.frame= newCCFrame;
        } completion: ^(BOOL finished){
            NSLog(@"finished2!");
        }];
    }

    postShoutOpen = !postShoutOpen;
}

CollapseableClick.m (問題のある部分?)

-(void)repositionCollapseClickCellsBelowIndex:(int)index withOffset:(float)offset {
    for (int yy = index+1; yy < self.dataArray.count; yy++) {
        CollapseClickCell *cell = [self.dataArray objectAtIndex:yy];
        cell.frame = CGRectMake(cell.frame.origin.x, cell.frame.origin.y + offset, cell.frame.size.width, cell.frame.size.height);
    }

    // Resize self.ContentSize
    CollapseClickCell *lastCell = [self.dataArray objectAtIndex:self.dataArray.count - 1];
    [self setContentSize:CGSizeMake(self.frame.size.width, lastCell.frame.origin.y + lastCell.frame.size.height + kCCPad)];

}

collapseableclick.m (全体)

//
//  CollapseClick.m
//  CollapseClick
//
//  Created by Ben Gordon on 2/28/13.
//  Copyright (c) 2013 Ben Gordon. All rights reserved.
//

#import "CollapseClick.h"
//#import "UIScrollView+SVPullToRefresh.h"

@implementation CollapseClick
@synthesize CollapseClickDelegate;


- (id)initWithFrame:(CGRect)frame
{
    self = [super initWithFrame:frame];
    if (self) {
        // Initialization code
        self.isClickedArray = [[NSMutableArray alloc] initWithCapacity:[CollapseClickDelegate numberOfCellsForCollapseClick]];
        self.dataArray = [[NSMutableArray alloc] initWithCapacity:[CollapseClickDelegate numberOfCellsForCollapseClick]];
        [self reloadCollapseClick];
    }
    return self;
}


#pragma mark - Load Data
-(void)reloadCollapseClick {
    // Set Up: Height
    float totalHeight = 0;

    // If Arrays aren't Init'd, Init them
    if (!(self.isClickedArray)) {
        self.isClickedArray = [[NSMutableArray alloc] initWithCapacity:[CollapseClickDelegate numberOfCellsForCollapseClick]];
    }

    if (!(self.dataArray)) {
        self.dataArray = [[NSMutableArray alloc] initWithCapacity:[CollapseClickDelegate numberOfCellsForCollapseClick]];
    }

    // Make sure they are clear
    [self.isClickedArray removeAllObjects];
    [self.dataArray removeAllObjects];

    // Remove all subviews
    for (UIView *subview in self.subviews) {
        [subview removeFromSuperview];
    }

    // Add cells
    for (int xx = 0; xx < [CollapseClickDelegate numberOfCellsForCollapseClick]; xx++) {
        // Create Cell
        ///add delegate methods for agree/disagree debaters here 
        CollapseClickCell *cell = [CollapseClickCell newCollapseClickCellWithTitle:[CollapseClickDelegate titleForCollapseClickAtIndex:xx] stats:[CollapseClickDelegate statsForCollapseClick:xx] index:xx content:[CollapseClickDelegate viewForCollapseClickContentViewAtIndex:xx]];


        // Set cell.TitleView's backgroundColor
        if ([(id)CollapseClickDelegate respondsToSelector:@selector(colorForCollapseClickTitleViewAtIndex:)]) {
            cell.TitleView.backgroundColor = [CollapseClickDelegate colorForCollapseClickTitleViewAtIndex:xx];
        }
        else {
            cell.TitleView.backgroundColor = [UIColor colorWithWhite:0.4 alpha:1.0];
        }


        // Set cell.TitleLabel's Color
        if ([(id)CollapseClickDelegate respondsToSelector:@selector(colorForTitleLabelAtIndex:)]) {
            cell.TitleLabel.textColor = [CollapseClickDelegate colorForTitleLabelAtIndex:xx];
        }
        else {
            cell.TitleLabel.textColor = [UIColor whiteColor];
        }


        // Set cell.TitleArrow's Color
        if ([(id)CollapseClickDelegate respondsToSelector:@selector(colorForTitleArrowAtIndex:)]) {
            [cell.TitleArrow drawWithColor:[CollapseClickDelegate colorForTitleArrowAtIndex:xx]];
        }
        else {
            [cell.TitleArrow drawWithColor:[UIColor colorWithWhite:0.0 alpha:0.35]];
        }

        // Set cell.ContentView's size
        cell.ContentView.frame = CGRectMake(0, kCCHeaderHeight + kCCPad, self.frame.size.width, cell.ContentView.frame.size.height);

        // Set cell's size
        cell.frame = CGRectMake(0, totalHeight, self.frame.size.width, kCCHeaderHeight);


        // Add target to Button
        [cell.TitleButton addTarget:self action:@selector(didSelectCollapseClickButton:) forControlEvents:UIControlEventTouchUpInside];

        // Add cell
        [self addSubview:cell];

        // Add to DataArray & isClickedArray
        [self.isClickedArray addObject:[NSNumber numberWithBool:NO]];
        [self.dataArray addObject:cell];

        // Calculate totalHeight
        totalHeight += kCCHeaderHeight + kCCPad;
    }


    // Set self's ContentSize and ContentOffset
    [self setContentSize:CGSizeMake(self.frame.size.width, totalHeight)];
    [self setContentOffset:CGPointZero];
    [[NSNotificationCenter defaultCenter]  postNotificationName:@"CollapseClickUpdated" object: self ];
}



#pragma mark - Reposition Cells
-(void)repositionCollapseClickCellsBelowIndex:(int)index withOffset:(float)offset {
    for (int yy = index+1; yy < self.dataArray.count; yy++) {
        CollapseClickCell *cell = [self.dataArray objectAtIndex:yy];
        cell.frame = CGRectMake(cell.frame.origin.x, cell.frame.origin.y + offset, cell.frame.size.width, cell.frame.size.height);
    }

    // Resize self.ContentSize
    CollapseClickCell *lastCell = [self.dataArray objectAtIndex:self.dataArray.count - 1];
    [self setContentSize:CGSizeMake(self.frame.size.width, lastCell.frame.origin.y + lastCell.frame.size.height + kCCPad)];

}


#pragma mark - Did Click
-(void)didSelectCollapseClickButton:(UIButton *)titleButton {
    BOOL isOpen = NO;

    // Cell is OPEN -> CLOSED
    if ([[self.isClickedArray objectAtIndex:titleButton.tag] boolValue] == YES) {
        [self closeCollapseClickCellAtIndex:titleButton.tag animated:YES];
    }
    // Cell is CLOSED -> OPEN
    else {
        [self openCollapseClickCellAtIndex:titleButton.tag animated:YES];
        isOpen = YES;
    }

    // Call delegate method
    if ([(id)CollapseClickDelegate respondsToSelector:@selector(didClickCollapseClickCellAtIndex:isNowOpen:)]) {
        [CollapseClickDelegate didClickCollapseClickCellAtIndex:titleButton.tag isNowOpen:isOpen];
    }
}

#pragma mark - Open CollapseClickCell
-(void)openCollapseClickCellAtIndex:(int)index animated:(BOOL)animated {
    // Check if it's not open first
    if ([[self.isClickedArray objectAtIndex:index] boolValue] != YES) {
        float duration = 0;
        if (animated) {
            duration = 0.25;
        }
        [UIView animateWithDuration:duration animations:^{
            // Resize Cell
            CollapseClickCell *cell = [self.dataArray objectAtIndex:index];
            cell.frame = CGRectMake(cell.frame.origin.x, cell.frame.origin.y, cell.frame.size.width, cell.ContentView.frame.origin.y + cell.ContentView.frame.size.height + kCCPad);

            // Change Arrow orientation
            CGAffineTransform transform = CGAffineTransformMakeRotation(M_PI/2);
            cell.TitleArrow.transform = transform;

            // Change isClickedArray
            [self.isClickedArray replaceObjectAtIndex:index withObject:[NSNumber numberWithBool:YES]];

            // Reposition all CollapseClickCells below Cell
            [self repositionCollapseClickCellsBelowIndex:index withOffset:cell.ContentView.frame.size.height + kCCPad];
        }];
    }
}

-(void)openCollapseClickCellsWithIndexes:(NSArray *)indexArray animated:(BOOL)animated {
    // This works off of NSNumbers for each Index
    for (int ii = 0; ii < indexArray.count; ii++) {
        id indexID = indexArray[ii];
        if ([indexID isKindOfClass:[NSNumber class]]) {
            [self openCollapseClickCellAtIndex:[indexID intValue] animated:animated];
        }
    }

}



#pragma mark - Close CollapseClickCell
-(void)closeCollapseClickCellAtIndex:(int)index animated:(BOOL)animated {
    // Check if it's open first
    if ([[self.isClickedArray objectAtIndex:index] boolValue] == YES) {
        float duration = 0;
        if (animated) {
            duration = 0.25;
        }
        [UIView animateWithDuration:duration animations:^{
            // Resize Cell
            CollapseClickCell *cell = [self.dataArray objectAtIndex:index];
            cell.frame = CGRectMake(cell.frame.origin.x, cell.frame.origin.y, cell.frame.size.width, kCCHeaderHeight);

            // Change Arrow orientation
            CGAffineTransform transform = CGAffineTransformMakeRotation(0);
            cell.TitleArrow.transform = transform;

            // Change isClickedArray
            [self.isClickedArray replaceObjectAtIndex:index withObject:[NSNumber numberWithBool:NO]];

            // Reposition all CollapseClickCells below Cell
            [self repositionCollapseClickCellsBelowIndex:index withOffset:-1*(cell.ContentView.frame.size.height + kCCPad)];
        }];
    }
}

-(void)closeCollapseClickCellsWithIndexes:(NSArray *)indexArray animated:(BOOL)animated {
    // This works off of NSNumbers for each Index
    for (int ii = 0; ii < indexArray.count; ii++) {
        id indexID = indexArray[ii];
        if ([indexID isKindOfClass:[NSNumber class]]) {
            [self closeCollapseClickCellAtIndex:[indexID intValue] animated:animated];
        }
    }
}


#pragma mark - CollapseClickCell for Index
-(CollapseClickCell *)collapseClickCellForIndex:(int)index {
    if ([[self.dataArray objectAtIndex:index] isKindOfClass:[CollapseClickCell class]]) {
        return [self.dataArray objectAtIndex:index];
    }

    return nil;
}


#pragma mark - Scroll To Cell
-(void)scrollToCollapseClickCellAtIndex:(int)index animated:(BOOL)animated {
    CollapseClickCell *cell = [self.dataArray objectAtIndex:index];
    [self setContentOffset:CGPointMake(cell.frame.origin.x, cell.frame.origin.y) animated:animated];
}


#pragma mark - Content View for Cell
-(UIView *)contentViewForCellAtIndex:(int)index {
    CollapseClickCell *cell = [self.subviews objectAtIndex:index];
    return cell.ContentView;
}

@end

ios - iOS: setContentSize が原因で UIScrollView フレーム全体がジャンプする

レイアウト：

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