iphone - UITableViewCells 不会根据设备或方向变化调整大小

Question

我正在尝试创建一个使用 UITableView 和四个自定义 UITableViewCells 的应用程序(它是一个多重选择表)。 UITableViewCells 仅适用于 iPhone 上的纵向模式。在所有其他配置中，它们都会出现一瞬间然后消失。注意:我使用的自定义单元格不使用 xib，所有内容都是以编程方式绘制的。

我的 UITableView 代码:

#import "VariablesViewController.h"

@interface VariablesViewController ()

@end

@implementation VariablesViewController

@synthesize dataSource, selectedMarks;

- (id)initWithStyle:(UITableViewStyle)style
{
    self = [super initWithStyle:style];
    if (self) {
        // Custom initialization
    }
    return self;
}

// displays the correct xib based on orientation and device type - called automatically upon view controller entry
-(void) willRotateToInterfaceOrientation:(UIInterfaceOrientation)toInterfaceOrientation duration:(NSTimeInterval)duration {

    if([UIDevice currentDevice].userInterfaceIdiom==UIUserInterfaceIdiomPad) {
        if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
            [[NSBundle mainBundle] loadNibNamed:@"VariablesViewController~landscape_iPad"
                                          owner:self
                                        options:nil];
            [self viewDidLoad];
        } else {
            [[NSBundle mainBundle] loadNibNamed:@"VariablesViewController_iPad"
                                          owner:self
                                        options:nil];
            [self viewDidLoad];
        }
    } else {
        if (UIInterfaceOrientationIsLandscape(toInterfaceOrientation)) {
            [[NSBundle mainBundle] loadNibNamed:@"VariablesViewController~landscape_iPhone"
                                          owner:self
                                        options:nil];
            [self viewDidLoad];
        } else {
            [[NSBundle mainBundle] loadNibNamed:@"VariablesViewController_iPhone"
                                          owner:self
                                        options:nil];
            [self viewDidLoad];
        }
    }

    [self.tableView reloadData];

}

// pre-iOS6 rotating options
- (BOOL)shouldAutorotateToInterfaceOrientation:(UIInterfaceOrientation)interfaceOrientation {
    self.view.autoresizesSubviews = YES;
    [self.tableView reloadData];
    return YES;
}

// iOS6 rotating options
- (BOOL)shouldAutorotate {
    self.view.autoresizesSubviews = YES;
    return YES;
}

// iOS6 interface orientations
- (NSUInteger)supportedInterfaceOrientations {
    return UIInterfaceOrientationMaskAll;
}

- (void)viewDidLoad
{
    [super viewDidLoad];

    UIBarButtonItem *doneButton = [[UIBarButtonItem alloc] initWithTitle:@"Done" style:UIBarButtonItemStyleDone target:self action:@selector(done)];

    dataSource = [[NSMutableArray alloc] init];
    selectedMarks = [[NSMutableArray alloc] init];

    [dataSource addObject:@"X"];
    [dataSource addObject:@"Y"];
    [dataSource addObject:@"Z"];
    [dataSource addObject:@"Magnitude"];

    [self loadPrefs];

    self.navigationItem.rightBarButtonItem = doneButton;

    self.navigationItem.title = @"Record Settings";


}

- (void) viewDidAppear:(BOOL)animated {
    [super viewDidAppear:animated];
    [self willRotateToInterfaceOrientation:self.interfaceOrientation duration:0];
}

- (void) loadPrefs {

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];

    BOOL x = [prefs boolForKey:@"X"];
    BOOL y = [prefs boolForKey:@"Y"];
    BOOL z = [prefs boolForKey:@"Z"];
    BOOL mag = [prefs boolForKey:@"Magnitude"];

    if (x)
        [selectedMarks addObject:@"X"];
    if (y)
        [selectedMarks addObject:@"Y"];
    if (z)
        [selectedMarks addObject:@"Z"];
    if (mag)
        [selectedMarks addObject:@"Magnitude"];


}

- (void) done {

    NSUserDefaults *prefs = [NSUserDefaults standardUserDefaults];
    [prefs setBool:[selectedMarks containsObject:@"X"] forKey:@"X"];
    [prefs setBool:[selectedMarks containsObject:@"Y"] forKey:@"Y"];
    [prefs setBool:[selectedMarks containsObject:@"Z"] forKey:@"Z"];
    [prefs setBool:[selectedMarks containsObject:@"Magnitude"] forKey:@"Magnitude"];

    [self.navigationController popViewControllerAnimated:YES];



}

- (void)didReceiveMemoryWarning
{
    [super didReceiveMemoryWarning];
    // Dispose of any resources that can be recreated.
}

#pragma mark - Table view data source

- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView
{
    // Return the number of sections.
    return 1;
}

- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section
{
    // Return the number of rows in the section.
    return 4;
}

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

    if(cell == nil)
        cell = [[UITableViewCell alloc] initWithStyle:UITableViewCellStyleDefault reuseIdentifier:cellIdent];

    cell.textLabel.text = [dataSource objectAtIndex:indexPath.row];
    if([selectedMarks containsObject:indexPath]) { cell.accessoryType = UITableViewCellAccessoryCheckmark; } else { cell.accessoryType = UITableViewCellAccessoryNone; }

    return cell;
}

#pragma mark - Table view delegate

-(void)tableView:(UITableView *)tableView didSelectRowAtIndexPath:(NSIndexPath *)indexPath {
    UITableViewCell *cell = [tableView cellForRowAtIndexPath:indexPath];
    if(cell.accessoryType == UITableViewCellAccessoryNone) {
        cell.accessoryType = UITableViewCellAccessoryCheckmark;
        [selectedMarks addObject:indexPath];
    }
    else {
        cell.accessoryType = UITableViewCellAccessoryNone;
        [selectedMarks removeObject:indexPath];
    }

    [tableView reloadRowsAtIndexPaths:[NSArray arrayWithObject:indexPath] withRowAnimation:UITableViewRowAnimationAutomatic];
}

@end

我正在使用在 Github 上找到的 CRTableViewCell 类:

//
//  CRTableViewCell.m
//  CRMultiRowSelector
//
//  Created by Christian Roman on 6/17/12.
//  Copyright (c) 2012 chroman. All rights reserved.
//

#import "CRTableViewCell.h"

/* Macro for background colors */
#define colorWithRGBHex(hex)[UIColor colorWithRed:((float)((hex&0xFF0000)>>16))/255.0 green:((float)((hex&0xFF00)>>8))/255.0 blue:((float)(hex&0xFF))/255.0 alpha:1.0]
#define clearColorWithRGBHex(hex)[UIColor colorWithRed:MIN((((int)(hex>>16)&0xFF)/255.0)+.1,1.0)green:MIN((((int)(hex>>8)&0xFF)/255.0)+.1,1.0)blue:MIN((((int)(hex)&0xFF)/255.0)+.1,1.0)alpha:1.0]

/* Unselected mark constants */
#define kCircleRadioUnselected      23.0
#define kCircleLeftMargin           13.0
#define kCircleRect                 CGRectMake(3.5, 2.5, 22.0, 22.0)
#define kCircleOverlayRect          CGRectMake(1.5, 12.5, 26.0, 23.0)

/* Mark constants */
#define kStrokeWidth                2.0
#define kShadowRadius               4.0
#define kMarkDegrees                70.0
#define kMarkWidth                  3.0
#define kMarkHeight                 6.0
#define kShadowOffset               CGSizeMake(.0, 2.0)
#define kMarkShadowOffset           CGSizeMake(.0, -1.0)
#define kMarkImageSize              CGSizeMake(30.0, 30.0)
#define kMarkBase                   CGPointMake(9.0, 13.5)
#define kMarkDrawPoint              CGPointMake(20.0, 9.5)
#define kShadowColor                [UIColor colorWithWhite:.0 alpha:0.7]
#define kMarkShadowColor            [UIColor colorWithWhite:.0 alpha:0.3]
#define kBlueColor                  0x236ed8
#define kGreenColor                 0x179714
#define kRedColor                   0xa4091c
#define kMarkColor                  kGreenColor

/* Colums and cell constants */
#define kColumnPosition             50.0
#define kMarkCell                   60.0
#define kImageRect                  CGRectMake(10.0, 8.0, 30.0, 30.0)

@implementation CRTableViewCell

@synthesize isSelected = _isSelected;
@synthesize textLabel = label;
@synthesize imageView = imageView;
@synthesize renderedMark = _renderedMark;

- (void)drawRect:(CGRect)rect
{    
    _isSelected = NO;

    CGFloat posY = (rect.size.height/2) - kCircleRadioUnselected/2;

    CGRect unselectedCircleRect = CGRectMake(kCircleLeftMargin, posY, kCircleRadioUnselected, kCircleRadioUnselected);
    CGRect imageViewRect = CGRectMake(10, rect.size.height/2 - kCircleLeftMargin - 1, kMarkCell/2, kMarkCell/2);

    imageView.frame = imageViewRect; // Center the imageView

    UIBezierPath *unselectedCircle = [UIBezierPath bezierPathWithOvalInRect:unselectedCircleRect]; // Unselected circle centered
    CGContextRef ctx = UIGraphicsGetCurrentContext();

    /* Unselected circle */
    CGContextSaveGState(ctx);
    {
        CGContextAddPath(ctx, unselectedCircle.CGPath);
        CGContextSetLineWidth(ctx, kStrokeWidth);
        CGContextSetRGBFillColor(ctx, 1.0, 1.0, 1.0, 1.0);
        CGContextSetRGBStrokeColor(ctx, 229/255.0, 229/255.0, 229/255.0, 1.0);
        CGContextDrawPath(ctx, kCGPathFillStroke);
    }
    CGContextRestoreGState(ctx);

    /* Column separator */
    CGContextSetRGBStrokeColor(ctx, 224/255.0, 224/255.0, 224/255.0, 1.0);
    CGContextSetLineWidth(ctx, 1.0);
    CGContextMoveToPoint(ctx, kColumnPosition, .0);
    CGContextAddLineToPoint(ctx, kColumnPosition, self.bounds.size.height);
    CGContextSetShouldAntialias(ctx, NO);
    CGContextStrokePath(ctx);

    [super drawRect:rect];
}

- (id)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
    self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
    if (self) {
        label = [[MarqueeLabel alloc] initWithFrame:CGRectMake(kMarkCell, .0, self.frame.size.width - kMarkCell, self.frame.size.height)];
        label.textColor = [UIColor blackColor];
        label.autoresizingMask = UIViewAutoresizingFlexibleRightMargin | UIViewAutoresizingFlexibleHeight;
        label.textAlignment = UITextAlignmentLeft;
        label.backgroundColor = [UIColor clearColor];
        [self.contentView addSubview:label];

        imageView = [UIImageView new];
        [self.contentView addSubview:imageView];

        _renderedMark = [self renderMark];
    }
    return self;
}

#pragma mark - Properties
- (void)setIsSelected:(BOOL)isSelected
{
    _isSelected = isSelected;
    self.imageView.image = (isSelected) ? _renderedMark : nil;

    [self setNeedsDisplay];
}

- (UIImage *)renderMark
{
    if(_renderedMark)
        return _renderedMark;

    if ([[UIScreen mainScreen] respondsToSelector:@selector(scale)])
        UIGraphicsBeginImageContextWithOptions(kMarkImageSize, NO, [UIScreen mainScreen].scale);
    else
        UIGraphicsBeginImageContext(kMarkImageSize);

    CGContextRef ctx = UIGraphicsGetCurrentContext();
    UIBezierPath *markCircle = [UIBezierPath bezierPathWithOvalInRect:kCircleRect];

    /* Background */
    CGContextSaveGState(ctx);
    {
        CGContextAddPath(ctx, markCircle.CGPath);
        CGContextSetFillColorWithColor(ctx, clearColorWithRGBHex(kMarkColor).CGColor);
        CGContextSetShadowWithColor(ctx, kShadowOffset, kShadowRadius, kShadowColor.CGColor );
        CGContextDrawPath(ctx, kCGPathFill);
    }
    CGContextRestoreGState(ctx);

    /* Overlay */
    CGContextSaveGState(ctx);
    {
        CGContextAddPath(ctx, markCircle.CGPath);
        CGContextClip(ctx);
        CGContextAddEllipseInRect(ctx, kCircleOverlayRect);
        CGContextSetFillColorWithColor(ctx, colorWithRGBHex(kMarkColor).CGColor);
        CGContextDrawPath(ctx, kCGPathFill);
    }
    CGContextRestoreGState(ctx);

    /* Stroke */
    CGContextSaveGState(ctx);
    {
        CGContextAddPath(ctx, markCircle.CGPath);
        CGContextSetLineWidth(ctx, kStrokeWidth);
        CGContextSetStrokeColorWithColor(ctx, [UIColor whiteColor].CGColor);
        CGContextDrawPath(ctx, kCGPathStroke);
    }
    CGContextRestoreGState(ctx);

    /* Mark */
    CGContextSaveGState(ctx);
    {
        CGContextSetShadowWithColor(ctx, kMarkShadowOffset, .0, kMarkShadowColor.CGColor );
        CGContextMoveToPoint(ctx, kMarkBase.x, kMarkBase.y);
        CGContextAddLineToPoint(ctx, kMarkBase.x + kMarkHeight * sin(kMarkDegrees), kMarkBase.y + kMarkHeight * cos(kMarkDegrees));
        CGContextAddLineToPoint(ctx, kMarkDrawPoint.x, kMarkDrawPoint.y);
        CGContextSetLineWidth(ctx, kMarkWidth);
        CGContextSetStrokeColorWithColor(ctx, [UIColor whiteColor].CGColor);
        CGContextStrokePath(ctx);
    }
    CGContextRestoreGState(ctx);

    UIImage *selectedMark = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    return selectedMark;
}

@end

非常感谢任何有关此问题的帮助。

Answer 1

您的代码中有一些奇怪的东西，我有几点建议:

1. viewDidLoad 必须仅在 View 加载时调用(并且由 iOS 而不是由您调用)。不要在轮换时再次调用 viewDidLoad。
2. 您也不应该手动调用 willRotateToInterfaceOrientation。它是进行调用的操作系统。我的建议是取消对此方法的调用。

尝试这些，测试并发布您在测试中观察到的结果。