调整UILabel内的文本

Question

我有一个UIScrollView我有3 UILabel和3 UIButton。我使用以下代码添加我的标签，但它保持顶部＆amp;标签内的下边距。

    float height = 0.0f;        
    for (int i=0; i < answer_set.count; i++) {

        UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20,height ,280,10 )];
        [label setText: [self.answer_set objectAtIndex:i]];
        [label setTextAlignment:NSTextAlignmentLeft];
        [label setBackgroundColor:[UIColor redColor]];
        label.textColor = [UIColor colorWithRed:0.2941f green:0.4666f blue:0.9549f alpha:1.0f];
        label.lineBreakMode = NSLineBreakByWordWrapping;
        label.numberOfLines = 0;
        [label sizeToFit];
        label.userInteractionEnabled = YES;
        label.font = [UIFont fontWithName:@"Arial" size:14.0f] ;
        [self.percentage_ans_view addSubview:label];

        height += label.frame.size.height;
    }

如果单行文本正常工作。 我该怎么做才能删除标签内部的这些顶部/底部间距。 ???

Answer 1

首先你应该根据文字

获得标签高度

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20,height ,280,10 )];
    [label setText: [self.answer_set objectAtIndex:i]];
    [label setTextAlignment:NSTextAlignmentLeft];
    [label setBackgroundColor:[UIColor redColor]];
    label.textColor = [UIColor colorWithRed:0.2941f green:0.4666f blue:0.9549f alpha:1.0f];
    label.lineBreakMode = NSLineBreakByWordWrapping;
    label.userInteractionEnabled = YES;
    label.font = [UIFont fontWithName:@"Arial" size:14.0f] ;
    [self.percentage_ans_view addSubview:label];
    // get height base on label text and size
    CGFloat height=[self getStringHeightforLabel:label];
    //set fram after getting height  
    label.frame=CGRectMake(20,height,280,height);
    [label sizeToFit];

//调用此方法获取身高

答案 1 :(得分：0)

我不确定我是否理解你的问题，但如果我这样做，你可以使用：

label.contentInset = UIEdgeInsetsMake(top, right, bittom, left);

设置标签内的间距

答案 2 :(得分：0)

你需要放置

    [label sizeToFit];

恰好在addSubview之前。并且，在字体更改后，您有问题

    label.font = [UIFont fontWithName:@"Arial" size:14.0f] ;

所以，您的代码必须如下所示：

float height = 0.0f;        
for (int i=0; i < answer_set.count; i++) {

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20,height ,280,10 )];
    [label setText: [self.answer_set objectAtIndex:i]];
    [label setTextAlignment:NSTextAlignmentLeft];
    [label setBackgroundColor:[UIColor redColor]];
    label.textColor = [UIColor colorWithRed:0.2941f green:0.4666f blue:0.9549f alpha:1.0f];
    label.lineBreakMode = NSLineBreakByWordWrapping;
    label.numberOfLines = 0;
    // [label sizeToFit]; // NOT HERE
    label.userInteractionEnabled = YES;
    label.font = [UIFont fontWithName:@"Arial" size:14.0f] ;
    [label sizeToFit]; // BUT HERE
    [self.percentage_ans_view addSubview:label];

    height += label.frame.size.height;
}

Answer 2

我不确定我是否理解你的问题，但如果我这样做，你可以使用：

label.contentInset = UIEdgeInsetsMake(top, right, bittom, left);

设置标签内的间距

Answer 3

你需要放置

    [label sizeToFit];

恰好在addSubview之前。并且，在字体更改后，您有问题

    label.font = [UIFont fontWithName:@"Arial" size:14.0f] ;

所以，您的代码必须如下所示：

float height = 0.0f;        
for (int i=0; i < answer_set.count; i++) {

    UILabel *label = [[UILabel alloc] initWithFrame:CGRectMake(20,height ,280,10 )];
    [label setText: [self.answer_set objectAtIndex:i]];
    [label setTextAlignment:NSTextAlignmentLeft];
    [label setBackgroundColor:[UIColor redColor]];
    label.textColor = [UIColor colorWithRed:0.2941f green:0.4666f blue:0.9549f alpha:1.0f];
    label.lineBreakMode = NSLineBreakByWordWrapping;
    label.numberOfLines = 0;
    // [label sizeToFit]; // NOT HERE
    label.userInteractionEnabled = YES;
    label.font = [UIFont fontWithName:@"Arial" size:14.0f] ;
    [label sizeToFit]; // BUT HERE
    [self.percentage_ans_view addSubview:label];

    height += label.frame.size.height;
}