计算cell的高度和自动适配高度

#import "BoyCell.h"
#import "Person.h"

@implementation BoyCell

- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier
{
self = [super initWithStyle:style reuseIdentifier:reuseIdentifier];
if (self) {
[self addAllViews];
}
return self;
}

#pragma mark - 添加全部控件
- (void)addAllViews
{
#define kMargin 10
#define kWidth 150
#define kHeight 35

self.nameLabel = [[[UILabel alloc] initWithFrame:CGRectMake(kMargin, kMargin, kWidth, kHeight)] autorelease];
[self.contentView addSubview:_nameLabel];

self.phoneLabel = [[[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(_nameLabel.frame) + kMargin, kMargin, kWidth, kHeight)] autorelease];
[self.contentView addSubview:_phoneLabel];

self.genderLabel = [[[UILabel alloc] initWithFrame:CGRectMake(kMargin, CGRectGetMaxY(_nameLabel.frame) + kMargin, kWidth, kHeight)] autorelease];
[self.contentView addSubview:_genderLabel];

self.ageLabel = [[[UILabel alloc] initWithFrame:CGRectMake(CGRectGetMaxX(_genderLabel.frame) + kMargin, _genderLabel.frame.origin.y, kWidth, kHeight)] autorelease];
[self.contentView addSubview:_ageLabel];

self.introduceLabel = [[[UILabel alloc] initWithFrame:CGRectMake(kMargin, CGRectGetMaxY(_genderLabel.frame) + kMargin, self.frame.size.width - kMargin * 2, kHeight * 2)] autorelease];
_introduceLabel.numberOfLines = 0;
[self.contentView addSubview:_introduceLabel];

//    for (UILabel *label in self.contentView.subviews) {
//        label.backgroundColor = [UIColor cyanColor];
//    }
}

#pragma mark 重写Person的setter方法
- (void)setPerson:(Person *)person
{
if (_person != person) {
[_person release];
_person = [person retain];

// 获取值，并放到Label上显示
_nameLabel.text = person.name;
_phoneLabel.text = person.phoneNumber;
_genderLabel.text = person.gender;
_ageLabel.text = [NSString stringWithFormat:@"%ld", person.age];
_introduceLabel.text = person.introduce;

// 根据文字计算高度
CGFloat height = [self calcHeightWithPerson:person];

CGRect frame = _introduceLabel.frame;
frame.size.height = height;
_introduceLabel.frame = frame;
}
}

#pragma mark 计算文字高度
- (CGFloat)calcHeightWithPerson:(Person *)person
{
CGSize size = CGSizeMake(_introduceLabel.frame.size.width, 2000);
NSDictionary *dict = @{
NSFontAttributeName : _introduceLabel.font
};
/*
1.在这个大小范围内进行计算
2.计算高度需要的枚举值
3.字典，包含文字的字体大小
4.上下文对象，此处设置为空
*/
CGRect rect = [person.introduce boundingRectWithSize:size options:NSStringDrawingUsesLineFragmentOrigin attributes:dict context:nil];

return rect.size.height;
}

#pragma mark 根据person计算出celld高度
+ (CGFloat)cellHeightWithPerson:(Person *)person
{
// 创建一个当前类的对象，用来使用上面计算高度的方法
BoyCell *boyCell = [[BoyCell new] autorelease];
// 通过方法，计算出自我介绍的高度
CGFloat height = [boyCell calcHeightWithPerson:person];
// 返回整个cell的高度
return height + 110;
}

- (void)awakeFromNib {

}

- (void)setSelected:(BOOL)selected animated:(BOOL)animated {
[super setSelected:selected animated:animated];

}

#pragma mark - 重写
#pragma mark dealloc
- (void)dealloc
{
[_nameLabel release];
[_phoneLabel release];
[_genderLabel release];
[_ageLabel release];
[_introduceLabel release];

[_person release];

[super dealloc];
}