iOS开发怎样让button可以实现抖动效果
遇到过这种需求要做成类似与苹果删除软件时的动态效果。
1.长按抖动;
2.抖动时出现一个X;
3.点击x，删除button;
4.抖动时，点击按钮，停止抖动;
下面是我的设计思路：
1.继承UIButton；
2.给button在右上角添加一个按钮；
3.给button添加长按手势；
4.给button添加遮盖，抖动时可以拦截点击事件；
有更好的做法，还请斧正。
// .m文件
#import "DZDeleteButton.h"
#import "UIView+Extension.h" // 这个只是为了方便取宽高的一个分类，代码就不贴了
@interface DZDeleteButton ()
// 是否抖动
@property (nonatomic, assign, getter=isShaking) BOOL shaking;
// 右上角的按钮，
@property (nonatomic, weak) UIImageView *iconBtn;
// 遮盖，在抖动时出现
@property (nonatomic, weak) UIView *coverView;
@end
@implementation DZDeleteButton
- (UIImageView *)iconBtn {
if (!_iconBtn) {
UIImageView *iconBtn = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"delete"]];
iconBtn.userInteractionEnabled = YES;
iconBtn.hidden = YES;
_iconBtn = iconBtn;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(iconClick)];
[iconBtn addGestureRecognizer:tap];
[self addSubview:iconBtn];
}
return _iconBtn;
}
- (UIView *)coverView {
if (!_coverView) {
UIView *view = [[UIView alloc] init];
view.backgroundColor = [UIColor clearColor];
view.hidden = YES;
UITapGestureRecognizer *tap = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(coverClick)];
[view addGestureRecognizer:tap];
[self addSubview:view];
_coverView = view;
}
return _coverView;
}
- (instancetype)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
[self addLongPressGestureRecognizer];
}
return self;
}
- (instancetype)init
{
self = [super init];
if (self) {
[self addLongPressGestureRecognizer];
}
return self;
}
- (instancetype)initWithCoder:(NSCoder *)coder
{
self = [super initWithCoder:coder];
if (self) {
[self addLongPressGestureRecognizer];
}
return self;
}
// 添加长按手势
- (void)addLongPressGestureRecognizer {
UILongPressGestureRecognizer *longPress = [[UILongPressGestureRecognizer alloc] initWithTarget:self action:@selector(longClick)];
[self addGestureRecognizer:longPress];
}
- (void)delete {
[self.iconBtn.superview removeFromSuperview];
}
// 是否执行动画
- (void)setShaking:(BOOL)shaking {
if (shaking) {
[self shakingAnimation];
self.coverView.hidden = NO;
self.iconBtn.hidden = NO;
} else {
[self.layer removeAllAnimations];
self.coverView.hidden = YES;
self.iconBtn.hidden = YES;
}
}
#pragma mark - 抖动动画
#define Angle2Radian(angle) ((angle) / 180.0 * M_PI)
- (void)shakingAnimation {
CAKeyframeAnimation *anim = [CAKeyframeAnimation animation];
anim.keyPath = @"transform.rotation";
anim.values = @[@(Angle2Radian(-5)), @(Angle2Radian(5)), @(Angle2Radian(-5))];
anim.duration = 0.25;
// 动画次数设置为最大
anim.repeatCount = MAXFLOAT;
// 保持动画执行完毕后的状态
anim.removedOnCompletion = NO;
anim.fillMode = kCAFillModeForwards;
[self.layer addAnimation:anim forKey:@"shake"];
}
- (void)longClick {
if (self.shaking) return;
self.shaking = YES;
}
// 点击右上角按钮
- (void)iconClick {
[self removeFromSuperview];
// 设计一个代理，为了在自己被删除后做一些事情(例如，对页面进行布局)
if ([self.delegate respondsToSelector:@selector(deleteButtonRemoveSelf:)]) {
[self.delegate deleteButtonRemoveSelf:self];
}
}
- (void)coverClick {
self.shaking = NO;
}
- (void)layoutSubviews {
[super layoutSubviews];
// 调整位置
self.imageView.x = 0;
self.imageView.y = 0;
self.imageView.width = self.width;
self.imageView.height = self.width;
self.titleLabel.x = 0;
self.titleLabel.width = self.width;
if (self.width >= self.height) {
self.titleLabel.height = 20;
self.titleLabel.y = self.height - self.titleLabel.height;
} else {
self.titleLabel.y = self.imageView.height;
self.titleLabel.height = self.height - self.titleLabel.y;
}
self.titleLabel.textAlignment = NSTextAlignmentCenter;
self.iconBtn.size = CGSizeMake(self.width * 0.3, self.width * 0.3);
self.iconBtn.x = self.width - self.iconBtn.width;
self.iconBtn.y = 0;
self.coverView.frame = self.bounds;
[self bringSubviewToFront:self.iconBtn];
}
@end
// .h文件 只有一个代理
#import <UIKit/UIKit.h>
@class DZDeleteButton;
@protocol DZDeleteButtonDelegate <NSObject>
@optional
- (void)deleteButtonRemoveSelf:(DZDeleteButton *)button;
@end
@interface DZDeleteButton : UIButton
@property (nonatomic, weak) id<DZDeleteButtonDelegate> delegate;
@end
效果图在vc中的代码
- (void)viewDidLoad {
[super viewDidLoad];
DZDeleteButton *button = [[DZDeleteButton alloc] init];
[button setImage:[UIImage imageNamed:@"bj"] forState:UIControlStateNormal];
[button setTitle:@"百思" forState:UIControlStateNormal];
button.delegate = self;
button.frame = CGRectMake(20, 20, 60, 80);
[button setTitleColor:[UIColor redColor] forState:UIControlStateNormal];
[button addTarget:self action:@selector(btnClick) forControlEvents:UIControlEventTouchUpInside];
[self.view addSubview:button];
}
- (void)btnClick {
NSLog(@"点击button");
}
- (void)deleteButtonRemoveSelf:(DZDeleteButton *)button {
NSLog(@"已经删除，要做什么事");
}
以上就是本文的全部内容，希望对大家的学习有所帮助。想要在iOS自定义button抖动效果并实现右上角删除按钮很简单，按照爱站技术频道小编整理出来的文章操作就行。
