Problem and Solution Code Snippets

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Problem：

依据String的大小来调整Label的frame。在view中又一次更新views的layout并显示。

Solution Code Snippets：

-(void)updateData
{
    self.view.layer.cornerRadius=10.0;
    [HYGlobalFunction setTTLabelText:@"二维码内容test" withParent:self.view withTag:1002 withClass:_StoreText_ withLineNum:1 withURL:NO withLeading:0.0];
    TTTAttributedLabel_HY *labelView= (TTTAttributedLabel_HY*)[self.view viewWithTag:1001];
    [HYGlobalFunction setTTLabelText:self.description withParent:self.view withTag:1001 withClass:_Arial14Color102New_ withLineNum:0 withURL:NO withLeading:1.0];
    labelView.delegate=self;
    CGRect frame=labelView.frame;
    CGFloat height = 0;
    if([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad)
        height=40 +ceilf([self.description sizeWithFont:[UIFont boldSystemFontOfSize:19] constrainedToSize:CGSizeMake(frame.size.width, CGFLOAT_MAX) lineBreakMode:UILineBreakModeWordWrap].height);
    else
        height=20 +ceilf([self.description sizeWithFont:[UIFont boldSystemFontOfSize:15] constrainedToSize:CGSizeMake(frame.size.width, CGFLOAT_MAX) lineBreakMode:UILineBreakModeWordWrap].height);
    frame=CGRectMake(frame.origin.x, frame.origin.y, frame.size.width, height);
    labelView.frame=frame;
    self.view.hidden=YES;
    [self changeSuperViewToHeight:height];
    [self.view setNeedsDisplay];
}

-(void)changeSuperViewToHeight:(CGFloat)height{
    CGRect oldFrame = self.view.frame;
    CGFloat newHeight = 0;
    if([[UIDevice currentDevice] userInterfaceIdiom] == UIUserInterfaceIdiomPad){
        newHeight = height+40;
        if(newHeight < oldFrame.size.height)
            newHeight = oldFrame.size.height;
    }else
        newHeight = height+20;
    CGRect newFrame = CGRectMake(oldFrame.origin.x, CGRectGetMidY(oldFrame)-newHeight/2, oldFrame.size.width, newHeight);
    self.view.frame = newFrame;
}

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