周卫星何晶晶小品,培训代理,长沙画室
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
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持移动技术网。
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