iphone - 准确无缝地将文本拆分为两个 UILabel

Question

我正在尝试为已设置尺寸的图像周围的文本创建类似“环绕”的效果。

         ___________
........|   
........| image
label.1.|
........|___________
....................
.......label.2......
....................
....................

这是我现在使用的方法:

- (NSArray *)splitString:(NSString*)str maxCharacters:(NSInteger)maxLength { //this will split the string to add to two UILabels
    NSMutableArray *tempArray = [NSMutableArray arrayWithCapacity:1];
    NSArray *wordArray = [str componentsSeparatedByCharactersInSet:[NSCharacterSet whitespaceCharacterSet]];
    NSInteger numberOfWords = [wordArray count];
    NSInteger index = 0;
    NSInteger lengthOfNextWord = 0;

    while (index < numberOfWords) {
        NSMutableString *line = [NSMutableString stringWithCapacity:1];
        while ((([line length] + lengthOfNextWord + 1) <= maxLength) && (index < numberOfWords)) {
            lengthOfNextWord = [[wordArray objectAtIndex:index] length];
            [line appendString:[wordArray objectAtIndex:index]];
            index++;
            if (index < numberOfWords) {
                [line appendString:@" "];
            }
        }
        [tempArray addObject:line];
    }
    return tempArray;
}

我给它我想要拆分文本的位置的 maxCharacters 值，这是第一个 UILabel 的最大高度。此方法本质上是我想要的，但有时第一个 UILabel 的最后一行比其他行“更高”，从而在第一个 UILabel 和第二个 UILabel 之间留下间隙。

下面是我如何使用该方法:

NSArray *splitStringArray = [self splitString:eventRecord.summary maxCharacters:280];

    UILabel *firstSumValue = [[UILabel alloc] init];
    NSString *firstSumString = [splitStringArray objectAtIndex:0];
    CGSize maxFirstSumSize = CGSizeMake(185.0,150.0);
    UIFont *firstSumFont = [UIFont fontWithName:@"HelveticaNeue-Bold" size:12];
    CGSize firstSumStringSize = [firstSumString sizeWithFont:firstSumFont
                                     constrainedToSize:maxFirstSumSize
                                         lineBreakMode:firstSumValue.lineBreakMode];



    CGRect firstSumFrame = CGRectMake(10.0, presentedValue.frame.origin.y + presentedValue.frame.size.height, 185.0, firstSumStringSize.height);


    firstSumValue.frame = firstSumFrame;

    firstSumValue.font = [UIFont fontWithName:@"HelveticaNeue" size:12];
    firstSumValue.lineBreakMode = UILineBreakModeWordWrap;
    firstSumValue.numberOfLines = 0 ;
    [self.mainScrollView addSubview:firstSumValue];



    firstSumValue.text = [splitStringArray objectAtIndex:0];


    UILabel *secondSumValue = [[UILabel alloc] init];

    NSInteger isSecond = 0;  //no
    if([splitStringArray count] > 1){
        isSecond = 1;  //yes

        NSString *secondSumString = [splitStringArray objectAtIndex:1];
        CGSize maxSecondSumSize = CGSizeMake(310.0,9999.0);
        UIFont *secondSumFont = [UIFont fontWithName:@"HelveticaNeue-Bold" size:12];
        CGSize secondSumStringSize = [secondSumString sizeWithFont:secondSumFont
                                               constrainedToSize:maxSecondSumSize
                                                   lineBreakMode:secondSumValue.lineBreakMode];



        CGRect secondSumFrame = CGRectMake(10.0, firstSumValue.frame.origin.y + firstSumValue.frame.size.height, 310.0, secondSumStringSize.height);


        secondSumValue.frame = secondSumFrame;

        secondSumValue.font = [UIFont fontWithName:@"HelveticaNeue" size:12];
        secondSumValue.lineBreakMode = UILineBreakModeWordWrap;
        secondSumValue.numberOfLines = 0 ;
        [self.mainScrollView addSubview:secondSumValue];


         secondSumValue.text = [splitStringArray objectAtIndex:1];


    }

如何使所有内容保持一致并正确对齐。也许，可以推荐一种更好的方法。不是核心文本，因为它超出了我的知识范围。

Answer 1

考虑改用 UIWebView，并在本地 HTML 文件中定义布局。与尝试手动处理复杂的布局相比，它可以让您省去很多麻烦。