Question

在添加UILabel以缩放UIScrollview问题时，我遇到了一个奇怪的问题。

我正在为缩放的UIScrollview添加两个视图 1. UIImageView 2. UILabelView

这里的代码用于在UIScrollview上添加UIImageView

float recentZoomScaleValue = 4.5;
CGRect rect = CGRectMake(x, y, 150, 150);

UIImageView *signatureImage = [[UIImageView alloc]initWithFrame:rect];

[signatureImage setImage:image];
[signatureImage setFrame:rect];

//resize the frame to avoid the auto zoom
CGRect frame = signatureImage.frame;
frame.size.width /= recentZoomScaleValue;
frame.size.height /= recentZoomScaleValue;

[signatureImage setFrame:frame];

[self addSubView:signatureImage];

[self.scrollview addSubView：signatureImage];

这里的代码用于在UIScrollview上添加UILabel

float recentZoomScaleValue = 4.5;
txtLabel = [[UILabel alloc] initWithFrame:CGRectMake(0, 0, 600, self.fontSize)];

[txtLabel setText:@"loganathan is a good boy"];

[txtLabel setFont:[UIFont fontWithName:txtLabel.font.fontName size:self.fontSize]];

[txtLabel setTextColor:[UIColor redColor]];
[txtLabel setBackgroundColor:[UIColor clearColor]];
[txtLabel setAutoresizingMask:UIViewAutoresizingFlexibleHeight];

CGRect frame = signatureImage.frame;
frame.size.width /= recentZoomScaleValue;
frame.size.height /= recentZoomScaleValue;

[txtLabel setFrame:frame];

[self addSubview：txtLabel];

但问题是，当我试图添加自动缩放添加的UILabel视图时。由于标签文字模糊不清。我不知道为什么，问题是什么。我应该使用CATextLayer而不是UILabel吗？任何可能感激的帮助。

由于

Answer 1

当zoomScale发生变化时，您必须将contentsScale设置为正确的值。或者是当前zoomScale的初始值：

动态缩放示例：

- (void)scrollViewDidEndZooming:(UIScrollView *)scrollView withView:(UIView *)view atScale:(float)scale {
    [yourLabel.layer setContentsScale:scale*[[UIScreen mainScreen] scale]];
    [yourLabel.layer setNeedsDisplay];
}

iOS：将UILabel添加到缩放的UIScrollview模糊不清

1 个答案: