这篇文章主要为大家详细介绍了iOS实现抽屉效果，文中示例代码介绍的非常详细，具有一定的参考价值，感兴趣的小伙伴们可以参考一下
正文
iOS实现抽屉效果
本文实例为大家分享了ios实现抽屉效果的具体代码，供大家参考，具体内容如下
抽屉效果：
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#import "dragerviewcontroller.h"#define screenw [uiscreen mainscreen].bounds.size.width@interface dragerviewcontroller ()@property (nonatomic, weak) uiview *leftv;@property (nonatomic, weak) uiview *rightv;@property (nonatomic, weak) uiview *mainv;@end@implementation dragerviewcontroller- (void)viewdidload { [super viewdidload]; //添加子控件 [self setup]; //添加手势 uipangesturerecognizer *pan = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(pan:)]; [self.mainv addgesturerecognizer:pan]; //给控制器的view添加点按手势 uitapgesturerecognizer *tap = [[uitapgesturerecognizer alloc] initwithtarget:self action:@selector(tap)]; [self.view addgesturerecognizer:tap];}- (void)tap{ //让mainv复位 [uiview animatewithduration:0.5 animations:^{ self.mainv.frame = self.view.bounds; }];}#define targetr 275#define targetl -275- (void)pan:(uipangesturerecognizer *)pan{ //获取偏移量 cgpoint transp = [pan translationinview:self.mainv]; //为什么不使用transform,是因为我们还要去修改高度,使用transform,只能修改,x,y //self.mainv.transform = cgaffinetransformtranslate(self.mainv.transform, transp.x, 0); self.mainv.frame = [self framewithoffsetx:transp.x]; //判断拖动的方向 if(self.mainv.frame.origin.x > 0){ //向右 self.rightv.hidden = yes; }else if(self.mainv.frame.origin.x < 0){ //向左 self.rightv.hidden = no; } //当手指松开时,做自动定位. cgfloat target = 0; if (pan.state == uigesturerecognizerstateended) { if (self.mainv.frame.origin.x > screenw * 0.5 ) { //1判断在右侧 //当前view的x有没有大于屏幕宽度的一半,大于就是在右侧 target = targetr; }else if(cgrectgetmaxx(self.mainv.frame) < screenw * 0.5){ //2.判断在左侧 //当前view的最大的x有没有小于屏幕宽度的一半,小于就是在左侧 target = targetl; } //计算当前mainv的frame. cgfloat offset = target - self.mainv.frame.origin.x; [uiview animatewithduration:0.5 animations:^{ self.mainv.frame = [self framewithoffsetx:offset]; }]; } //复位 [pan settranslation:cgpointzero inview:self.mainv];}#define maxy 100//根据偏移量计算mainv的frame- (cgrect)framewithoffsetx:(cgfloat)offsetx { nslog(@"offsetx===%f",offsetx); cgrect frame = self.mainv.frame; nslog(@"x====%f",frame.origin.x); frame.origin.x += offsetx; //当拖动的view的x值等于屏幕宽度时,maxy为最大,最大为100 // 375 * 100 / 375 = 100 //对计算的结果取绝对值 cgfloat y = fabs( frame.origin.x * maxy / screenw); frame.origin.y = y; //屏幕的高度减去两倍的y值 frame.size.height = [uiscreen mainscreen].bounds.size.height - (2 * frame.origin.y); return frame;}- (void)setup{ //leftv uiview *leftv = [[uiview alloc] initwithframe:self.view.bounds]; leftv.backgroundcolor = [uicolor bluecolor]; self.leftv = leftv; [self.view addsubview:leftv]; //rightv uiview *rightv = [[uiview alloc] initwithframe:self.view.bounds]; rightv.backgroundcolor = [uicolor greencolor]; self.rightv = rightv; [self.view addsubview:rightv]; //mianv uiview *mainv = [[uiview alloc] initwithframe:self.view.bounds]; mainv.backgroundcolor = [uicolor redcolor]; self.mainv = mainv; [self.view addsubview:mainv];}@end |
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原文链接：https://blog.csdn.net/u010981736/article/details/77447098
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