iOS - 一个简单的带标题的图标的实现
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代码不复杂,直接上代码:
ImageViewButton.h
// // ImageViewButton.h// // 带有图片、底部标题或者顶部的按钮 // // #import <UIKit/UIKit.h> NS_ASSUME_NONNULL_BEGIN @interface ImageViewButton : UIView /** * 带有图标标题的按钮 * * @param frame 大小 * @param image 图标 * @param title 标题 * @param topTitle 标题是否在顶部 * */ - (instancetype)initWithFrame:(CGRect)frame image:(NSString *)image title:(NSString *)title topTitle:(BOOL)topTitle; // 按钮点击回调 @property (copy, nonatomic) void (^iconClickCallback) (void); @end NS_ASSUME_NONNULL_END
ImageViewButton.m
// // ImageViewButton.m // #import "ImageViewButton.h" @interface ImageViewButton () // 图标 @property (strong, nonatomic) UIButton *iconButton; // 标题 @property (strong, nonatomic) UILabel *titleLabel; // 标题是否在顶部 @property (assign, nonatomic) BOOL topTitle; @end @implementation ImageViewButton - (instancetype)initWithFrame:(CGRect)frame image:(NSString *)image title:(NSString *)title topTitle:(BOOL)topTitle { if (self = [super initWithFrame:frame]) { self.topTitle = topTitle; self.translatesAutoresizingMaskIntoConstraints = NO; // 图标 self.iconButton = [[UIButton alloc] initWithFrame:CGRectZero]; self.iconButton.translatesAutoresizingMaskIntoConstraints = NO; [self.iconButton setImage:[UIImage imageNamed:image] forState:UIControlStateNormal]; [self.iconButton addTarget:self action:@selector(iconButtonClick:) forControlEvents:UIControlEventTouchUpInside]; [self addSubview:self.iconButton]; // 标题 self.titleLabel = [[UILabel alloc] initWithFrame:CGRectZero]; self.titleLabel.translatesAutoresizingMaskIntoConstraints = NO; self.titleLabel.textAlignment = NSTextAlignmentCenter; self.titleLabel.textColor = [UIColor whiteColor]; self.titleLabel.text = title; [self addSubview:self.titleLabel]; [self setConstraints]; } return self; } - (void)iconButtonClick:(UIButton *)sender { if (self.iconClickCallback) { self.iconClickCallback(); } } - (void)setConstraints { // 标题 NSLayoutConstraint *titleLabelTopBottomLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.titleLabel attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1.0 constant:0.0]; NSLayoutConstraint *titleLabelLeadingLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.titleLabel attribute:NSLayoutAttributeLeading relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeLeading multiplier:1.0 constant:0.0]; NSLayoutConstraint *titleLabelTrailingLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.titleLabel attribute:NSLayoutAttributeTrailing relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTrailing multiplier:1.0 constant:0.0]; NSLayoutConstraint *titleLabelHeightLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.titleLabel attribute:NSLayoutAttributeHeight relatedBy:NSLayoutRelationEqual toItem:nil attribute:NSLayoutAttributeNotAnAttribute multiplier:1.0 constant:16.0]; // 图标 NSLayoutConstraint *iconImageViewWidthHeightLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.iconButton attribute:NSLayoutAttributeWidth relatedBy:NSLayoutRelationEqual toItem:self.iconButton attribute:NSLayoutAttributeHeight multiplier:1.0 constant:0.0]; NSLayoutConstraint *iconImageViewCenterXLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.iconButton attribute:NSLayoutAttributeCenterX relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeCenterX multiplier:1.0 constant:0.0]; NSLayoutConstraint *iconImageViewTopLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.iconButton attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self.titleLabel attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0]; NSLayoutConstraint *iconImageViewBottomLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.iconButton attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0]; if (self.topTitle == NO) { // 标题在底部 titleLabelTopBottomLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.titleLabel attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeBottom multiplier:1.0 constant:0.0]; iconImageViewTopLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.iconButton attribute:NSLayoutAttributeTop relatedBy:NSLayoutRelationEqual toItem:self attribute:NSLayoutAttributeTop multiplier:1.0 constant:0.0]; iconImageViewBottomLayoutConstraint = [NSLayoutConstraint constraintWithItem:self.iconButton attribute:NSLayoutAttributeBottom relatedBy:NSLayoutRelationEqual toItem:self.titleLabel attribute:NSLayoutAttributeTop multiplier:1.0 constant:0.0]; } [self addConstraints:@[titleLabelTopBottomLayoutConstraint, titleLabelLeadingLayoutConstraint, titleLabelTrailingLayoutConstraint, titleLabelHeightLayoutConstraint, iconImageViewWidthHeightLayoutConstraint, iconImageViewCenterXLayoutConstraint, iconImageViewTopLayoutConstraint, iconImageViewBottomLayoutConstraint]]; } /* // Only override drawRect: if you perform custom drawing. // An empty implementation adversely affects performance during animation. - (void)drawRect:(CGRect)rect { // Drawing code } */ @end
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