效果
源码：https://github.com/youxianming/ios-project-examples 中的 sideviewcontroller
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//
// viewcontroller.m
// sideviewcontroller
//
// created by youxianming on 16/6/6.
// copyright © 2016年 youxianming. all rights reserved.
//
#import "viewcontroller.h"
#import "leftviewcontroller.h"
#import "mainviewcontroller.h"
#import "uiview+setrect.h"
@interface viewcontroller () {
cgfloat _screenwidth;
}
@property (nonatomic, strong) uipangesturerecognizer *pangesture;
@property (nonatomic) cgpoint panbeginpoint;
@property (nonatomic, strong) leftviewcontroller *leftviewcontroller;
@property (nonatomic, strong) uiview *leftview;
@property (nonatomic, strong) mainviewcontroller *mainviewcontroller;
@property (nonatomic, strong) uiview *mainview;
@end
@implementation viewcontroller
- (void)viewdidload {
[super viewdidload];
// init some value.
_screenwidth = width;
// add backgroundview.
uiimageview *backgroundview = [[uiimageview alloc] initwithframe:self.view.bounds];
backgroundview.image = [uiimage imagenamed:@"back"];
[self.view addsubview:backgroundview];
// leftviewcontroller
self.leftviewcontroller = [[leftviewcontroller alloc] init];
self.leftview = self.leftviewcontroller.view;
[self.view addsubview:self.leftview];
// mainviewcontroller
self.mainviewcontroller = [[mainviewcontroller alloc] init];
self.mainview = self.mainviewcontroller.view;
[self.view addsubview:self.mainview];
// pan gesture.
self.pangesture = [[uipangesturerecognizer alloc] initwithtarget:self action:@selector(pangestureevent:)];
[self.mainview addgesturerecognizer:self.pangesture];
}
- (void)pangestureevent:(uipangesturerecognizer *)gesture {
cgpoint translation = [gesture translationinview:gesture.view];
cgpoint velocity = [gesture velocityinview:gesture.view];
cgfloat gap = _screenwidth / 3.f * 2;
cgfloat sensitiveposition = _screenwidth / 2.f;
if (velocity.x < 0 && _mainview.x <= 0) {
// 过滤掉向左侧滑过头的情形
_mainview.x = 0.f;
} else {
if (gesture.state == uigesturerecognizerstatebegan) {
// 开始
_panbeginpoint = translation;
if (_mainview.x >= sensitiveposition) {
_panbeginpoint.x -= gap;
}
} else if (gesture.state == uigesturerecognizerstatechanged) {
// 值变化
_mainview.x = translation.x - _panbeginpoint.x;
if (_mainview.x <= 0) {
// 过滤掉向左侧滑过头的情形
_mainview.x = 0.f;
}
} else if (gesture.state == uigesturerecognizerstateended) {
// 结束
[uiview animatewithduration:0.20f animations:^{
_mainview.x >= sensitiveposition ? (_mainview.x = gap) : (_mainview.x = 0);
}];
}
}
}
@end
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