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在开发工作中遇到了一个对我来说非常难得问题，搞了两天呀，都虚脱了，终于骗到大神给的demo做了出来效果是这样
首先后台的同事传一个字符串。。拒绝传数组，那么我们就要学会分割！
NSString *tagStr = [dictionary valueForKey:@"tags"];
NSArray *statusArray = [tagStr componentsSeparatedByString:@","];
这个就是把字符串按照符号分割数组的方法，接下来我们就可以根据内容动态生成标签了；
这是用到的宏：
#define FONT_SIZE 13.0f
#define HORIZONTAL_PADDING 7.0f
#define VERTICAL_PADDING 3.0f
#define CORNER_RADIUS 10.0f
#define LABEL_MARGIN 5.0f
#define BOTTOM_MARGIN 5.0f
#define BACKGROUND_COLOR UIColorFromRGB(0x04, 0x9f, 0xf1)
//[UIColor colorWithRed:0.93 green:0.93 blue:0.93 alpha:1.00]
#define TEXT_COLOR [UIColor whiteColor]
#define TEXT_SHADOW_COLOR [UIColor whiteColor]
#define TEXT_SHADOW_OFFSET CGSizeMake(0.0f, 1.0f)
#define BORDER_COLOR [UIColor lightGrayColor].CGColor
#define BORDER_WIDTH 1.0f
这是代码：
if (tagStr.length > 0)//判断一下有值才生成
{
float totalHeight = 0;//
CGRect previousFrame = CGRectZero;
BOOL gotPreviousFrame = NO;//检查是否有前一个标签
for (NSString *text in statusArray)
{
CGSize textSize = [text sizeWithFont:[UIFont systemFontOfSize:FONT_SIZE] constrainedToSize:CGSizeMake(self.frame.size.width, 1500) lineBreakMode:UILineBreakModeWordWrap];//动态获取字符串长度
textSize.width += HORIZONTAL_PADDING*2;
textSize.height += VERTICAL_PADDING*2;
UILabel *label = nil;
if (!gotPreviousFrame)
{
label = [[UILabel alloc] initWithFrame:CGRectMake(0, 5, textSize.width, textSize.height)];
totalHeight = textSize.height;
}
else
{
CGRect newRect = CGRectZero;
if (previousFrame.origin.x + previousFrame.size.width + textSize.width + LABEL_MARGIN > self.frame.size.width) {
newRect.origin = CGPointMake(0, previousFrame.origin.y + textSize.height + BOTTOM_MARGIN);
totalHeight += textSize.height + BOTTOM_MARGIN;
}
else
{
newRect.origin = CGPointMake(previousFrame.origin.x + previousFrame.size.width + LABEL_MARGIN, previousFrame.origin.y);
}
newRect.size = textSize;
label = [[UILabel alloc] initWithFrame:newRect];
}
previousFrame = label.frame;
gotPreviousFrame = YES;
[label setFont:[UIFont systemFontOfSize:FONT_SIZE]];
if (!lblBackgroundColor)
{
[label setBackgroundColor:BACKGROUND_COLOR];
} else
{
[label setBackgroundColor:lblBackgroundColor];
}
[label setTextColor:TEXT_COLOR];
[label setText:text];
[label setTextAlignment:UITextAlignmentCenter];
// [label setShadowColor:TEXT_SHADOW_COLOR];
// [label setShadowOffset:TEXT_SHADOW_OFFSET];
[label.layer setMasksToBounds:YES];
[label.layer setCornerRadius:CORNER_RADIUS];
[label.layer setBorderColor:BORDER_COLOR];
[label.layer setBorderWidth: BORDER_WIDTH];
[_CorpTagView addSubview:label];
}
sizeFit = CGSizeMake(self.frame.size.width, totalHeight + 1.0f);//这个我一直不知道什么作用，抄来的O(∩_∩)O哈哈~
}
ios开发笔记根据传入字符串的长度动态生成label，并按照屏幕宽度排列
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原文地址：http://www.cnblogs.com/tuhaoYY/p/4442499.html
