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我正在尝试添加大小可变的 UILabel。

标签包含来自用户的评论。我在这里尝试实现标签的动态大小，然后将它们添加到我的视图中（稍后我将添加到主视图中）

我知道这会使标签出现在彼此之上，但这不是问题。标签根本不显示。

NSMutableDictionary *comments = [[NSMutableDictionary alloc] init];
[comments setObject:@"xxxxxxxxx" forKey:@"simon"];
[comments setObject:@"xxxxxxxxxxxxxxxx" forKey:@"pontus"];
[comments setObject:@"xxxxx" forKey:@"sudden"];
[comments setObject:@"xxxx" forKey:@"juan"];
[comments setObject:@"xxxxxxxxxxx" forKey:@"eric"];

DetailedViewController *detailedBurger= [[DetailedViewController alloc] initWithNibName:nil bundle:nil];

for(NSString *key in comments){
    UILabel *label =  [[UILabel alloc] init];
    label.backgroundColor = [UIColor clearColor];
    label.text = [comments objectForKey:key]; //etc...
    [label setFont:[UIFont fontWithName:@"PatuaOne-Regular" size:12.0]];

    CGSize maximumLabelSize = CGSizeMake(296,9999);

    CGSize expectedLabelSize = [label.text sizeWithFont:label.font
                                      constrainedToSize:maximumLabelSize
                                          lineBreakMode:label.lineBreakMode];

    //adjust the label the the new height.
    CGRect newFrame = label.frame;
    newFrame.size.height = expectedLabelSize.height;
    newFrame.size.width = expectedLabelSize.width;
    NSLog(@"expectedlabelsizeheight %f", newFrame.size.height);
    label.frame = newFrame;
    [label setNeedsDisplay];
    [detailedBurger.commentField addSubview:label];
    NSLog(@"%f, %f", label.center.x, label.center.y);

}

// Do any additional setup after loading the view from its nib.
self.backgroundView.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"background.png"]];

UIScrollView *scrollView = [[UIScrollView alloc] initWithFrame:self.backgroundView.frame];
scrollView.contentSize = CGSizeMake(320, 900);

[scrollView addSubview:detailedBurger.view];
detailedBurger.view.center = CGPointMake(160, detailedBurger.view.frame.size.height/2);
[self.backgroundView addSubview:scrollView];

如果我用硬值（例如label.frame = CGRectMake(0,0,10,10)）明确设置框架，则此代码有效，但动态调整大小似乎不起作用。

控制台输出：

2013-07-09 10:12:42.223 RateYourBurger[31439:c07] expectedlabelsizeheight 15.000000
2013-07-09 10:12:42.224 RateYourBurger[31439:c07] 10.000000, 20.000000
2013-07-09 10:12:42.224 RateYourBurger[31439:c07] expectedlabelsizeheight 15.000000
2013-07-09 10:12:42.224 RateYourBurger[31439:c07] 10.000000, 20.000000
2013-07-09 10:12:42.225 RateYourBurger[31439:c07] expectedlabelsizeheight 15.000000
2013-07-09 10:12:42.225 RateYourBurger[31439:c07] 10.000000, 20.000000
2013-07-09 10:12:42.226 RateYourBurger[31439:c07] expectedlabelsizeheight 15.000000
2013-07-09 10:12:42.226 RateYourBurger[31439:c07] 10.000000, 20.000000
2013-07-09 10:12:42.227 RateYourBurger[31439:c07] expectedlabelsizeheight 15.000000
2013-07-09 10:12:42.227 RateYourBurger[31439:c07] 10.000000, 20.000000
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1 回答 1

1

动态调整大小不起作用，因为您必须setNeedsDisplay在设置框架后调用方法。

label.frame = newFrame;

[label setNeedsDisplay];

编辑

    NSString *text1 = @"This is my text This is my text This is my text This is my text This is my text This is my text This is my text This is my text";
    CGSize constraint1 = CGSizeMake(280, 2000);



 CGSize size1 = [text1 sizeWithFont:[UIFont systemFontOfSize:12] constrainedToSize:constraint1 lineBreakMode:UILineBreakModeWordWrap];


    label.frame=CGRectMake(posx,posy,size1.width,size1.height);
    label.lineBreakMode = UILineBreakModeWordWrap;
    label.numberOfLines = size1.height/15;
    [label setFont:[UIFont systemFontOfSize:12]];
    label.text = text1;
    [label setNeedsDisplay];
于 2013-07-09T07:53:29.313 回答