造轮子 - 计算集合视图的高度

//计算集合视图的高度

• (CGFloat)calculateHeightOfCollectionViewForTexts:(NSArray*)texts{

//集合视图的宽度
CGFloat viewWidth = SCREEN_WIDTH - 12 - 12;

//设置文本之间的间隔
CGFloat textInterval = 10.f;
//计算多个文本宽度和
CGFloat textWidthSum = textInterval;
//设置文本的行高
CGFloat textHeight   = 34.f;
//设置文本计数
NSInteger textCount  = 0;
//记录行数
NSInteger numberRow  = 0;
for (NSString *str in texts) {
    textCount ++;
    textWidthSum = textWidthSum + [self calculateWidthOfTextForStr:str] + textInterval;
    if (textWidthSum > viewWidth) {
        numberRow ++;
        textWidthSum = textInterval + [self calculateWidthOfTextForStr:str];
        textCount = 1;
    }
    
    if ([str isEqualToString:texts.lastObject]) {
        numberRow ++;
    }
}


return textHeight*numberRow + 10*(numberRow-1) + 20;

}