import "RGWebView.h"
@interface RGWebView()
@property (nonatomic, strong) UIView *redView;
@property (nonatomic, strong) UIView *blueView;
@property (assign, nonatomic) NSInteger start;
@property (assign, nonatomic) BOOL backBool;
@property (assign, nonatomic) BOOL forwardBool;
@end
@implementation RGWebView
-(instancetype)initWithFrame:(CGRect)frame{
if (self = [super initWithFrame:frame]) {
self.start = 0;
self.backBool = NO;
self.forwardBool = NO;
[self setupUI];
}
return self;
}
-(void)setupUI{
if (nil == _redView) {
_redView = [[UIView alloc]init];
_redView.backgroundColor = [UIColor redColor];
[self addSubview:_redView];
}
if (nil == _blueView) {
_blueView = [[UIView alloc]init];
_blueView.backgroundColor = [UIColor blueColor];
[self addSubview:_blueView];
}
UIPanGestureRecognizer *gesture = [[UIPanGestureRecognizer alloc]initWithTarget:self action:@selector(panGesture:)];
[self addGestureRecognizer:gesture];
}
-(void)layoutSubviews{
[super layoutSubviews];
self.redView.frame = CGRectMake(-100, 100, 100, 50);
self.blueView.frame = CGRectMake(KScreen_Width, 100, 100, 50);
}
pragma mark === gesture===
-
(void)panGesture:(UIPanGestureRecognizer *)sender{
if (![self canGoBack] && ![self canGoForward]) {
return;
}//狀態(tài)
if (sender.state == UIGestureRecognizerStateBegan) {CGPoint location = [sender locationInView:self]; self.start = location.x;}else if (sender.state == UIGestureRecognizerStateChanged) {
CGPoint location = [sender locationInView:self]; if (location.x - self.start > 0 && [self canGoBack]) { self.redView.x = MIN(location.x - self.start, 100) - 100; self.backBool = YES; }else{ if ([self canGoForward]) { self.blueView.x = KScreen_Width - MIN(-(location.x - self.start), 100); self.forwardBool = YES; } }}else if (sender.state == UIGestureRecognizerStateEnded) {
self.redView.x = -100;
self.blueView.x = KScreen_Width;
self.start = 0;
if (self.backBool) {
[self goBack];
}else if (self.forwardBool) {
[self goForward];
}
self.backBool = NO;
self.forwardBool = NO;
}
}
@end
