iOS 标签Tag列表的实现代码

 // // 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 

 // // 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)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.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 

 // // 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 

 // // 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