表格视图单元格中的iOS地图视图错误的框架原点

Question

我需要在表格视图单元格中设置地图视图的位置。我只是在 cellForRow 方法中设置了框架。

一些地图视图放错了位置。当我向上滚动表格并向下滚动以使其重新出现（以重用表格单元格）时，它就被修复了。

注意

1. y 位置错误但 x 位置正确。

2. 我使用相同的方式（简单地设置框架）来设置图片位置，它们总是正确的。所以问题是地图视图本身而不是如何定位框架。

以下截图显示了 3 个地图视图，中间的 y 位置错误

编辑：

UI 部分相当复杂。在 cellForRowAtIndexPath 方法中，我将 MessageCell 出列并调用其 setupWithMessage:(Message *)message 方法，然后检查消息是否为位置类型：（位置类型消息具有可选的文本视图和地图视图）

        self.textView.hidden = NO;
        self.mapView.hidden = NO;

        self.textView.text = message.text;


        [Helper setupMapView:self.mapView posx:message.posx posy:message.posy];

        CGSize size1 = [UIHelper sizeWithText:message.text entity:message];
        CGSize size2 = [UIHelper sizeWithMapEntity:message];

        CGRect frame = [UIHelper adjustTextView:self.textView textViewSize:size1 extraView:self.mapView extraViewSize:size2 entity:message];








+ (CGRect)adjustTextView:(UITextView *)textView textViewSize:(CGSize)textViewSize extraView:(UIView *)extraView extraViewSize:(CGSize)extraViewSize entity:(id)entity {


    if (textView == nil || extraView == nil || CGSizeEqualToSize(textViewSize, CGSizeZero) || CGSizeEqualToSize(extraViewSize, CGSizeZero)) {
        CGSize targetSize;
        UIView *targetView;

        if (textView == nil || CGSizeEqualToSize(textViewSize, CGSizeZero)) {

            targetView = extraView;
            targetSize = extraViewSize;

        }
        else {
            targetView = textView;
            targetSize = textViewSize;
        }

        return [self adjustContentView:targetView size:targetSize entity:entity];

    }

    else {

        CGRect frame1 = [self adjustContentView:textView size:textViewSize entity:entity];
        CGRect frame2 = [self adjustContentView:extraView size:extraViewSize entity:entity];

        frame2.origin.y += frame1.size.height + OFFSET_BETWEEN_TEXTVIEW_EXTRAVIEW;
        extraView.frame = frame2;

        return CGRectMake(frame1.origin.x, frame1.origin.y, MAX(frame1.size.width, frame2.size.width), frame1.size.height + frame2.size.height + OFFSET_BETWEEN_TEXTVIEW_EXTRAVIEW);
    }

请注意，上面的“extraView”可以指代文本视图下方的任何视图，例如 UIImageView

+ (CGRect)adjustContentView:(UIView *)contentView size:(CGSize) size entity:(id)entity {

    float photoSideOffset = 60;
    float topOffset = 30;

    CGRect frame;
    frame.origin.y = topOffset;
    frame.size = size;

    if ([DBHelper isMyEntity:entity]) {
        frame.origin.x = 320 - size.width - photoSideOffset;
    }
    else {
        frame.origin.x = photoSideOffset;
    }
    contentView.frame = frame;


    if ([contentView isKindOfClass:[UITextView class]]) {
        [(UITextView *)contentView sizeToFit];
    }

    return contentView.frame;
}

编辑 2：我对照片消息使用相同的 UIHelper 方法，并且坐标是正确的：

编辑 3：size1 size2 和 frame 的值

Answer 1

方法一： alloc init UITableViewCell 在你的cellForRowAtIndexPath

简单的解决方法是每次cell = [[UITableViewCell alloc]init];alloc init （它每次都会创建新的单元格而不是缓存/或重用）

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
    {
        static NSString *CellIdentifier = @"Cell";
        UITableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:CellIdentifier forIndexPath:indexPath];

        // Configure the cell...

       /*
        if (cell == nil) {

            cell = [[UITableViewCell alloc]initWithStyle:UITableViewCellStyleSubtitle reuseIdentifier:CellIdentifier];

        }

       */
      // Try below code

      cell = [[UITableViewCell alloc]init];


        ------

        -------

        return cell;

    }

方法 2： removeFromSuperView

  for (UIView *subview in self.view.subviews) {

        if ([subview isKindOfClass:[UIButton class]]) { // set kind as per your own requirement

            [subview removeFromSuperview];
        }


    }

Answer 2

我提出的解决方法并不是真正的“解决方案”而是“替代方案”

您可以从地图视图创建快照，而不是将 mkmapview 放到单元格中。然后您可以为地图单元格创建图像单元格。我的建议是当用户单击图像单元格并推送新的“MapViewController”模式时触发一个动作。

        self.textView.hidden = NO;
        self.thumbnailButton.hidden = NO;

        self.textView.text = message.text;


        [Helper setupMapSnapshotThumbnailButton:self.thumbnailButton withPosx:message.posx posy:message.posy size:MESSAGE_SIZE_MAP];

        CGSize size1 = [UIHelper sizeWithText:message.text entity:message];
        CGSize size2 = MESSAGE_SIZE_MAP;

        CGRect frame = [UIHelper adjustTextView:self.textView textViewSize:size1 extraView:self.thumbnailButton extraViewSize:size2 entity:message];

        [self setupCommonOutletsWithContentFrame:frame];

您可以使用创建图像

MKMapSnapshotOptions *options = [[MKMapSnapshotOptions alloc] init];
options.scale = [UIScreen mainScreen].scale;
options.region = [self private_mapRegionWithPosx:posx posy:posy];
options.size = size;

MKMapSnapshotter *snapshotter = [[MKMapSnapshotter alloc] initWithOptions:options];
[snapshotter startWithCompletionHandler:^(MKMapSnapshot *snapshot, NSError *error) {
    [thumbnailButton setBackgroundImage:snapshot.image forState:UIControlStateNormal];
}];

顺便说一句，快照代码仅适用于 ios 7。如果您需要 ios6 或更早版本的支持，则需要进行一些 cg 编码

Answer 3

代码示例

MultiMap.h

#import <UIKit/UIKit.h>
#import <MapKit/MapKit.h>

@interface MultiMap : UIViewController
<UITableViewDelegate,UITableViewDataSource,MKMapViewDelegate>
{
    MKMapView *mapView;
}
@property (retain, nonatomic) IBOutlet UITableView *mainTableView;

@end

MultiMap.m

#import "MultiMap.h"

@interface MultiMap ()

@end

@implementation MultiMap

- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{
    self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];
    if (self) {
        // Custom initialization
    }
    return self;
}

- (void)viewDidAppear:(BOOL)animated{
    [super viewDidAppear:YES];
    self.title=@"Multi Map";
}

- (void)viewDidLoad
{
    [super viewDidLoad];
}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
}

- (NSString *)tableView:(UITableView *)tableView titleForHeaderInSection:(NSInteger)section{
    return nil;
}

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {
    return 1;
}

- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath
{
    return 200;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {
    return 4;
}

- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath
{
    static NSString *CellIdentifier = @"multi";
    UITableViewCell *cell=nil;

    cell = [tableView dequeueReusableHeaderFooterViewWithIdentifier:CellIdentifier];
    if (cell == nil) {
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:CellIdentifier];
    }
    mapView=[[MKMapView alloc]initWithFrame:CGRectMake(25, 25, 275, 150)];
    mapView.delegate=self;
    [mapView setBackgroundColor:[UIColor whiteColor]];
    [mapView setTintColor:[UIColor whiteColor]];

    [cell addSubview:mapView];

    return cell;
}

- (void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {

}

- (void)mapView:(MKMapView *)mapView didUpdateUserLocation:(MKUserLocation *)userLocation
{

}

- (MKAnnotationView *)mapView:(MKMapView *)mapView viewForAnnotation:(id <MKAnnotation>)annotation
{
    MKAnnotationView *annotationView = [[MKPinAnnotationView alloc] initWithAnnotation:annotation reuseIdentifier:@""];

    annotationView.canShowCallout = YES;

    return annotationView;
}

- (void)dealloc {
    [_mainTableView release];
    [super dealloc];
}
@end

你能得到帮助吗..

Answer 4

请确保您的 textView 框架为 0。对于 mapView 未在准确位置显示的情况，您可以尝试关注。

+ (CGRect)adjustTextView:(UITextView *)textView textViewSize:(CGSize)textViewSize extraView:(UIView *)extraView extraViewSize:(CGSize)extraViewSize entity:(id)entity {


    if (textView == nil || extraView == nil || CGSizeEqualToSize(textViewSize, CGSizeZero) || CGSizeEqualToSize(extraViewSize, CGSizeZero)) {
        CGSize targetSize;
        UIView *targetView;

        if (textView == nil || CGSizeEqualToSize(textViewSize, CGSizeZero)) {

            targetView = extraView;
            targetSize = extraViewSize;

        }
        else {
            targetView = textView;
            targetSize = textViewSize;
        }

        return [self adjustContentView:targetView size:targetSize entity:entity];

    }

    else {

        CGRect frame1 = [self adjustContentView:textView size:textViewSize entity:entity];
        CGRect frame2 = [self adjustContentView:extraView size:extraViewSize entity:entity];

        frame2.origin.y += frame1.size.height + OFFSET_BETWEEN_TEXTVIEW_EXTRAVIEW;
        extraView.frame = frame2;
        [[extraView superview] setNeedsLayout]; //Addition
        return CGRectMake(frame1.origin.x, frame1.origin.y, MAX(frame1.size.width, frame2.size.width), frame1.size.height + frame2.size.height + OFFSET_BETWEEN_TEXTVIEW_EXTRAVIEW);
    }

更新：或者您可以更新以下内容

+ (CGRect)adjustContentView:(UIView *)contentView size:(CGSize) size entity:(id)entity {

float photoSideOffset = 60;
float topOffset = 30;

CGRect frame;
frame.size = size;

if ([DBHelper isMyEntity:entity]) {
    frame.origin.x = 320 - size.width - photoSideOffset;
}
else
{
    frame.origin.x = photoSideOffset;
}

for (id view in [[contentView superview] subviews])
{
    if (view != contentView)
    {
        if ([view respondsToSelector:@selector(frame)])
        {
            topOffset = (([view frame].origin.y + [view frame].size.height)<topOffset)?([view frame].origin.y + [view frame].size.height):topOffset;
        }
    }
}
if ((int)topOffset != 30)
{
    topOffset += OFFSET_BETWEEN_TEXTVIEW_EXTRAVIEW;
}
frame.origin.y = topOffset;
contentView.frame = frame;


if ([contentView isKindOfClass:[UITextView class]]) {
    [(UITextView *)contentView sizeToFit];
}

return contentView.frame;
}

还要确保使用- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath

相应地更新单元格的高度