[英]Find UILabel bottom position so a second UILabel can be created below
我有一篇我正在创作的新文章。 正在为文章标题添加UILabel
。 标题文本有时可能是一行,两行或三行文本。 然后我需要在标题下面创建一个UILabel
。
由于标题具有动态高度,因此无法定位日期UILabel
。
是否有计算来获得我的UILabel
框架的底部位置?
注意:我使用siteToFit
来确保UILabel
的框架适合。
// Text
UILabel *title = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, self.view.bounds.size.width-20, 50)];
//title.backgroundColor = [UIColor clearColor];
title.backgroundColor = [UIColor redColor];
title.text = self.firstItem.title;
//title.text = @"This is a test of a short title that is a little longer";
title.textColor = [UIColor whiteColor];
title.layer.shadowColor = [UIColor blackColor].CGColor;
title.layer.shadowOffset = CGSizeMake(0, 0);
title.layer.shadowRadius = 0.6;
title.textAlignment = NSTextAlignmentLeft;
title.layer.shadowOpacity = 1.0;
title.layer.masksToBounds = NO;
title.font = [UIFont boldSystemFontOfSize:16.0];
title.numberOfLines = 0;
[title sizeToFit];
[self.firstNewsItemBackgroundView addSubview:title];
self.cachedParalax = self.firstNewsItemBackgroundView.frame;
// Fix positioning
title.center = CGPointMake(title.center.x, self.imageView.frame.size.height - title.frame.size.height);
// Date
UILabel *titleDate = [[UILabel alloc] initWithFrame:CGRectMake(10, 0, self.view.bounds.size.width-20, 50)];
titleDate.backgroundColor = [UIColor clearColor];
titleDate.text = self.firstItem.publishedDateString;
titleDate.textColor = [UIColor whiteColor];
titleDate.layer.shadowColor = [UIColor blackColor].CGColor;
titleDate.layer.shadowOffset = CGSizeMake(0, 0);
titleDate.layer.shadowRadius = 0.7;
titleDate.textAlignment = NSTextAlignmentLeft;
titleDate.layer.shadowOpacity = 0.95;
titleDate.layer.masksToBounds = NO;
titleDate.font = [UIFont italicSystemFontOfSize:12.0];
titleDate.numberOfLines = 0;
[title sizeToFit];
[self.firstNewsItemBackgroundView addSubview:titleDate];
// Fix positioning
CGRect frame = titleDate.frame;
titleDate.frame = CGRectMake(10, title.center.y + (title.frame.size.height/2), frame.size.width, frame.size.height);
好吧,看起来你有一个错字。 您再次调用[title sizeToFit]而不是[titleDate sizeToFit],这可能是问题的一部分。
假设10px空间,请定位日期标签:
CGRect dateFrame = titleDate.frame;
dateFrame.origin.y = title.frame.origin.y + title.frame.size.height + 10;
[titleDate setFrame:dateFrame]
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