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。
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// .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 |
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// .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 |
上面效果图在vc中的代码
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- (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。
