先说需求，要做一个类似这种的列表
标签控件直接用的第三方
YZTagList
不知道的可以去搜一下，当这不重要。
重要的是这个控件加载数据的时候非常影响列表滑动效果，造成卡顿，尤其是列表行数如果更多的话，
这也不是要说的重点，自己写的控件也不一定就不耗性能，所以记一下我这次的处理方法。
先看一下cell代码：
1 @interface PreferTableViewCell ()
2 @property (nonatomic, weak) UILabel *titleLabel;
3 @property (nonatomic, strong) YZTagList *tagList;
4 @end
5
6 @implementation PreferTableViewCell
7
8 - (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {
9
if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {
10
[self setupUI];
11 }
12
return self;
13 }
14 - (void)setupUI {
15
UIView *lineView = [[UIView alloc] init];
16
lineView.backgroundColor = [UIColor colorWithRed:246/255.0 green:247/255.0 blue:248/255.0 alpha:1.0];
17 [self.contentView addSubview:lineView];
18
[lineView makeConstraints:^(MASConstraintMaker *make) {
19
make.left.equalTo(self);
20
make.right.equalTo(self);
21
make.height.equalTo(10);
22
make.top.equalTo(self);
23 }];
24
25
UILabel *titleLabel = [[UILabel alloc] init];
26
titleLabel.textColor = [UIColor blackColor];
27
titleLabel.font = [UIFont systemFontOfSize:15];
28 [self.contentView addSubview:titleLabel];
29
self.titleLabel = titleLabel;
30
[titleLabel makeConstraints:^(MASConstraintMaker *make) {
31
make.left.equalTo(self).offset(15);
32
make.top.equalTo(lineView.bottom).offset(10);
33 }];
34
35
YZTagList *tagList = [[YZTagList alloc] init];
36
tagList.isSort = NO;
37
tagList.backgroundColor = [UIColor whiteColor];
38
// 高度可以设置为0，会自动跟随标题计算
39
tagList.frame = CGRectMake(15, 50, SCREEN_WIDTH - 30, 0);
40
// 设置标签背景色
41
tagList.tagBackgroundColor = [UIColor colorWithRed:246/255.0 green:247/255.0 blue:248/255.0 alpha:1.0];
42
// 设置标签颜色
43
tagList.tagColor = [UIColor colorWithHex:@"#303030"];
44
45
tagList.tagFont = [UIFont systemFontOfSize:13];
46
tagList.tagCornerRadius = 4;
47
tagList.clickTagBlock = ^(UIButton *btn){
48
btn.selected = !btn.isSelected;
49
if (btn.isSelected) {
50
[btn setTitleColor:[UIColor whiteColor] forState:UIControlStateNormal];
51
[btn setBackgroundColor:[UIColor colorWithHex:@"#7676FD"]];
52
} else {
53
[btn setTitleColor:[UIColor colorWithHex:@"#303030"] forState:UIControlStateNormal];
54
[btn setBackgroundColor:[UIColor colorWithRed:246/255.0 green:247/255.0 blue:248/255.0 alpha:1.0]];
55
}
56 };
57 [self.contentView addSubview:tagList];
58
59
self.tagList = tagList;
60 }
61 - (void)setTitle:(NSString *)title {
62
_title = title;
63
self.titleLabel.text = title;
64 }
65 - (void)setTags:(NSArray *)tags {
66
_tags = tags;
67
68
if (self.tagList.tagArray.count > 0) {
69
return;
70 }
71 [self.tagList addTags:tags];
72 }
73 + (CGFloat)calcHeight:(NSArray *)tags {
74
YZTagList *tagList = [[YZTagList alloc] init];
75
tagList.frame = CGRectMake(15, 50, SCREEN_WIDTH - 30, 0);
76
tagList.tagFont = [UIFont systemFontOfSize:13];
77
tagList.tagCornerRadius = 4;
78 [tagList addTags:tags];
79
return tagList.tagListH + 45 + 21;
80 }
81 @end