前言
1、之前项目中会有一些标签列表来显示某些特性或要求，如下图（代码实现后的效果）:
2、期间也是浏览了好多其他的第三方，但是可能是没找到好的方法去寻找吧，没有找到一个合适的，况且又不是特别复杂的东西，所以就自己写了一套，但是注意因为我们项目中使用的是rac+mansory,所以想要使用的话需要引入这两个库=_=。
3、自己写的时候考虑的不是太多，中心思想是viewmodel做定制需求，view通过viewmodel来实现定制化ui，其他更多的是逻辑上的排版，所以不做更多赘述，自己体会y^o^y 。
view布局
lslabeltextview.h的实现
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//
// lslabeltextview.h
// rencheren
//
// created by 王隆帅 on 15/12/30.
// copyright © 2015年 王隆帅. all rights reserved.
//
#import "ycview.h"
@interface lslabeltextview : ycview
@end
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lslabeltextview.m的实现
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//
// lslabeltextview.m
// rencheren
//
// created by 王隆帅 on 15/12/30.
// copyright © 2015年 王隆帅. all rights reserved.
//
#import "lslabeltextview.h"
#import "lslabeltextviewmodel.h"
@interface lslabeltextview ()
@property (nonatomic, strong) lslabeltextviewmodel *viewmodel;
@end
@implementation lslabeltextview {
masconstraint *_toleftbtnmasconstraint;
masconstraint *_totopbtnmasonstraint;
masconstraint *_toleftselfmasconstraint;
masconstraint *_totopselfmasonstraint;
}
- (instancetype)initwithviewmodel:(id<ycviewmodelprotocol>)viewmodel {
self.viewmodel = (lslabeltextviewmodel *)viewmodel;
return [super initwithviewmodel:viewmodel];
}
- (void)yc_bindviewmodel {
@weakify(self);
[[racobserve(self, viewmodel.dataarray) distinctuntilchanged] subscribenext:^(id x) {
@strongify(self);
[self.subviews makeobjectsperformselector:@selector(removefromsuperview)];
if (self.viewmodel.dataarray.count <= 0) {
__weak uiview *weaknullview;
uiview *nullview = [[uiview alloc] init];
weaknullview = nullview;
[self addsubview:weaknullview];
ws(weakself)
[weaknullview mas_makeconstraints:^(masconstraintmaker *make) {
make.top.right.left.bottom.equalto(weakself);
make.height.equalto(weakself.viewmodel.nullheight);
}];
return;
}
nsinteger linenum = 1;
cgfloat allwidth = 0;
__weak uibutton *lastbtn;
for (int i = 0; i < self.viewmodel.dataarray.count; i++) {
nsstring *string = [self.viewmodel.dataarray stringwithindex:i];
__weak uibutton *weakbtn = [self ls_getbtnwithstring:string];
[self addsubview:weakbtn];
cgsize size = [string widthwithheight:20 andfont:self.viewmodel.textfontnum];
cgfloat needfloat = size.width < self.viewmodel.miniwidth ? self.viewmodel.miniwidth : size.width;
if (lastbtn) {
ws(weakself)
[weakbtn mas_makeconstraints:^(masconstraintmaker *make) {
_toleftbtnmasconstraint = make.left.equalto(lastbtn.mas_right).offset(weakself.viewmodel.labelhorizontalspace);
[_toleftbtnmasconstraint activate];
_totopbtnmasonstraint = make.top.equalto(lastbtn.mas_bottom).offset(weakself.viewmodel.labelverticalspace);
[_totopbtnmasonstraint deactivate];
_toleftselfmasconstraint = make.left.equalto(weakself.viewmodel.lefttoviewedge);
_totopselfmasonstraint = make.top.equalto(lastbtn);
make.size.equalto(cgsizemake(needfloat + 20, weakself.viewmodel.labelheight));
}];
if (allwidth + self.viewmodel.labelhorizontalspace + needfloat + 20 + self.viewmodel.righttoviewedge > self.viewmodel.allwidth) {
[_toleftselfmasconstraint activate];
[_toleftbtnmasconstraint deactivate];
[_totopbtnmasonstraint activate];
[_totopselfmasonstraint deactivate];
linenum ++;
allwidth = self.viewmodel.lefttoviewedge + needfloat + 20;
} else {
[_toleftselfmasconstraint deactivate];
[_toleftbtnmasconstraint activate];
[_totopbtnmasonstraint deactivate];
[_totopselfmasonstraint activate];
allwidth = allwidth + self.viewmodel.labelhorizontalspace + needfloat + 20;
}
} else {
ws(weakself)
[weakbtn mas_makeconstraints:^(masconstraintmaker *make) {
make.left.equalto(weakself.viewmodel.lefttoviewedge);
make.size.equalto(cgsizemake(needfloat + 20, weakself.viewmodel.labelheight));
make.top.equalto(weakself.viewmodel.toptoviewedge);
}];
allwidth = allwidth + self.viewmodel.lefttoviewedge + needfloat + 20;
}
lastbtn = weakbtn;
}
ws(weakslef)
[lastbtn mas_updateconstraints:^(masconstraintmaker *make) {
make.bottom.equalto(weakslef.viewmodel.bottomtoviewedge);
}];
}];
}
- (uibutton *)ls_getbtnwithstring:(nsstring *)string {
uibutton *btn = [uibutton buttonwithtype:uibuttontypecustom];
btn.layer.borderwidth = 0.5;
btn.layer.bordercolor = self.viewmodel.bordercolor.cgcolor;
[btn settitlecolor:self.viewmodel.titlecolor forstate:uicontrolstatenormal];
btn.backgroundcolor = self.viewmodel.backgroundcolor;
btn.layer.maskstobounds = yes;
btn.layer.cornerradius = self.viewmodel.cornerradius;
btn.titlelabel.font = yc_yahei_font(self.viewmodel.textfontnum);
[btn settitle:string forstate:uicontrolstatenormal];
btn.ls_typestring = string;
return btn;
}
@end
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viewmodel适配
lslabeltextviewmodel.h的实现
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//
// lslabeltextviewmodel.h
// rencheren
//
// created by 王隆帅 on 15/12/30.
// copyright © 2015年 王隆帅. all rights reserved.
//
#import "ycviewmodel.h"
@interface lslabeltextviewmodel : ycviewmodel
/**
* 标签数组
*/
@property (nonatomic, strong) nsmutablearray *dataarray;
/**
* 总的宽度
*/
@property (nonatomic, assign) cgfloat allwidth;
/**
* 没有标签时的高度
*/
@property (nonatomic, assign) cgfloat nullheight;
/**
* 文字字体大小
*/
@property (nonatomic, assign) cgfloat textfontnum;
/**
* 取得标签为空的时候，标签最小长度
*/
@property (nonatomic, assign) cgfloat miniwidth;
/**
* 标签高度
*/
@property (nonatomic, assign) cgfloat labelheight;
/**
* 最左侧标签距离view的边缘的宽度
*/
@property (nonatomic, assign) cgfloat lefttoviewedge;
/**
* 最右侧标签距离view的边缘的宽度
*/
@property (nonatomic, assign) cgfloat righttoviewedge;
/**
* 最上侧标签距离view的边缘的宽度
*/
@property (nonatomic, assign) cgfloat toptoviewedge;
/**
* 最下侧标签距离view的边缘的宽度
*/
@property (nonatomic, assign) cgfloat bottomtoviewedge;
/**
* 横向标签之间的宽度
*/
@property (nonatomic, assign) cgfloat labelhorizontalspace;
/**
* 纵向标签之间的宽度
*/
@property (nonatomic, assign) cgfloat labelverticalspace;
/**
* label(btn) 的相关属性
*/
@property (nonatomic, assign) cgfloat borderwidth;
@property (nonatomic, strong) uicolor *bordercolor;
@property (nonatomic, strong) uicolor *titlecolor;
@property (nonatomic, strong) uicolor *backgroundcolor;
@property (nonatomic, assign) cgfloat cornerradius;
@end
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lslabeltextviewmodel.m的实现
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//
// lslabeltextviewmodel.m
// rencheren
//
// created by 王隆帅 on 15/12/30.
// copyright © 2015年 王隆帅. all rights reserved.
//
#import "lslabeltextviewmodel.h"
@implementation lslabeltextviewmodel
- (nsmutablearray *)dataarray {
if (!_dataarray) {
_dataarray = [[nsmutablearray alloc] init];
}
return _dataarray;
}
@end
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以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：http://www.jianshu.com/p/db3ead7a8d31#