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关于tableview 在cell上展示标签,实现高度自动计算

关于tableview 在cell上展示标签,实现高度自动计算

作者: lovelytitantian | 来源:发表于2017-03-16 13:44 被阅读84次

1、首先先展示一下要实现的效果:

2、如果整个页面使用collectionView来布局就比较简单了,但是如果是tableview的cell上来实现这种效果的话,高度不是很好控制,我使用了tableview自动行高,然后再cell里赋值的时候进行masonry布局,这里要控制好不要重复创建标签,根据具体需求可以选择传入一次数据源,也可以每次创建标签的时候,把之前创建的标签删除掉,tableviewcell中的代码如下:

-(void)setTagArray:(NSArray *)tagArray{

_tagArray = tagArray;

NSArray *currentArray = tagArray;

NSInteger index = 0;

CGFloat width = 0;

CGFloat top = 15;

if (tagArray != nil) {

if (currentArray.count == 0) {

UIView *smallView = [UIView new];

[self.contentView addSubview:smallView];

[smallView mas_makeConstraints:^(MASConstraintMaker *make) {

make.left.right.top.bottom.equalTo(self.contentView);

make.height.mas_equalTo(0.1);

}];

}

}

for (NSDictionary *tagDic in currentArray) {

index ++;

CGRect rect = [tagDic[@"name"] boundingRectWithSize:CGSizeMake(MAXFLOAT, 25) options:NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading attributes:@{NSFontAttributeName : [UIFont systemFontOfSize:13]} context:nil];

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

nameLabel.text = SNHNoNilString(tagDic[@"name"]);

nameLabel.font = [UIFont systemFontOfSize:13];

nameLabel.textAlignment = NSTextAlignmentCenter;

nameLabel.layer.cornerRadius = 3;

nameLabel.layer.borderWidth = 0.5;

nameLabel.layer.borderColor = [UIColor snh_d5d6d7Color].CGColor;

[self.contentView addSubview:nameLabel];

if (index == 1) {

width = 15 + rect.size.width + 25 + 12;

}else{

width = width + rect.size.width + 25 + 12;

}

if ((width + 15) > snh_screenWidth()) {

top = top + 40;

}

if (_previousLabel == nil) {

[nameLabel mas_makeConstraints:^(MASConstraintMaker *make) {

make.left.mas_equalTo(self.contentView.mas_left).offset(15);

make.top.mas_equalTo(self.contentView.mas_top).offset(top);

if (index == _tagArray.count) {

make.bottom.mas_equalTo(self.contentView.mas_bottom).offset(-15);

}

make.size.mas_equalTo(CGSizeMake(rect.size.width + 25, 25));

}];

}else{

[nameLabel mas_makeConstraints:^(MASConstraintMaker *make) {

NSLog(@"====%f",_previousLabel.frame.origin.x);

if ((width + 15) > snh_screenWidth()) {

make.left.mas_equalTo(self.contentView.mas_left).offset(15);

make.top.mas_equalTo(self.contentView.mas_top).offset(top);

if (index == _tagArray.count) {

make.bottom.mas_equalTo(self.contentView.mas_bottom).offset(-15);

}

}else{

make.left.mas_equalTo(_previousLabel.mas_right).offset(12);

make.centerY.mas_equalTo(_previousLabel.mas_centerY);

if (index == _tagArray.count) {

make.bottom.mas_equalTo(self.contentView.mas_bottom).offset(-15);

}

}

make.size.mas_equalTo(CGSizeMake(rect.size.width + 25, 25));

}];

}

if ((width + 15) > snh_screenWidth()) {

width = 15 + rect.size.width + 25 + 12;

}

_previousLabel = nameLabel;

}

}



以上是代码,要注意最后一个标签与cell底部有约束,来实现自动行高

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