【版本适配】iOS中文本的自适应高度

最新推荐文章于 2023-09-25 18:03:23 发布

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#版本适配iOS中文本的自适应高度

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本文介绍如何根据不同的iOS设备版本计算文字高度，并在指定宽度下调整文本框大小，确保文字显示完整且美观。

//文字高度

+ (float)height:(NSString *)lab

{

#ifdef __IPHONE_7_0

NSDictionary * dic = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize: K_FONT_SIZE],NSFontAttributeName, nil];

if ([[[UIDevice currentDevice]systemVersion]floatValue]>=7.0) {

CGRect rect = [lab boundingRectWithSize:CGSizeMake(K_INTRODUCE_LABLE_WIDTH, 0) options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil];

if ([lab isEqualToString:@""]) {

rect.size.height = 0;

}

return rect.size.height;

}

else

{

CGSize rect = [lab sizeWithFont:[UIFont systemFontOfSize:K_FONT_SIZE] constrainedToSize:CGSizeMake(220,2000) lineBreakMode:NSLineBreakByTruncatingHead];

if ([lab isEqualToString:@""]) {

rect.height = 0;

}

return rect.height;

}

#endif

}

- (void)setCellVal:(NSString *)cellVal

{

if (_cellVal != cellVal) {

[_cellVal release];

_cellVal = [cellVal retain];

}

self.cellLabel.text = cellVal;

#ifdef __IPHONE_7_0

//计算文本在限定范围内的高度

NSDictionary * dic = [NSDictionary dictionaryWithObjectsAndKeys:[UIFont systemFontOfSize:K_FONT_SIZE], NSFontAttributeName, nil];

if ([[[UIDevice currentDevice]systemVersion]floatValue]>=7.0) {

CGRect rect = [_cellLabel.text boundingRectWithSize:CGSizeMake(K_INTRODUCE_LABLE_WIDTH, 0) options:NSStringDrawingUsesLineFragmentOrigin attributes:dic context:nil];

_cellLabel.frame = CGRectMake(_cellLabel.left, _cellLabel.top, _cellLabel.width, rect.size.height);

}

else if ([[[UIDevice currentDevice]systemVersion]floatValue] < 7.0){

CGSize rect = [_cellLabel.text sizeWithFont:[UIFont systemFontOfSize:K_FONT_SIZE] constrainedToSize:CGSizeMake(220,2000) lineBreakMode:NSLineBreakByTruncatingHead];