oc手势解锁密码demo

以下是一个使用 Objective-C 编写的手势解锁密码的示例代码：

首先，在你的项目中创建一个名为 "GestureLockView" 的 UIView 子类。这个类将用于绘制手势解锁的视图。

GestureLockView.h：

#import <UIKit/UIKit.h>

@protocol GestureLockViewDelegate <NSObject>

- (void)gestureLockView:(UIView *)lockView didFinishWithPath:(NSString *)path;

@end

@interface GestureLockView : UIView

@property (nonatomic, weak) id<GestureLockViewDelegate> delegate;

@end

GestureLockView.m：

#import "GestureLockView.h"

@interface GestureLockView()

@property (nonatomic, strong) NSMutableArray *selectedButtons;

@end

@implementation GestureLockView

- (instancetype)initWithFrame:(CGRect)frame {
    self = [super initWithFrame:frame];
    if (self) {
        self.backgroundColor = [UIColor clearColor];
        self.selectedButtons = [NSMutableArray array];
    }
    return self;
}

- (void)drawRect:(CGRect)rect {
    CGContextRef context = UIGraphicsGetCurrentContext();
    
    for (int i = 0; i < 9; i++) {
        CGFloat x = (i % 3) * 100 + 25;
        CGFloat y = (i / 3) * 100 + 25;
        CGRect frame = CGRectMake(x, y, 50, 50);
        UIButton *button = [[UIButton alloc] initWithFrame:frame];
        button.tag = i + 1;
        button.layer.cornerRadius = 25.0;
        button.layer.borderWidth = 1.0;
        button.layer.borderColor = [UIColor blackColor].CGColor;
        [button setBackgroundImage:[self imageWithColor:[UIColor blueColor]] forState:UIControlStateSelected];
        [button setBackgroundImage:[self imageWithColor:[UIColor whiteColor]] forState:UIControlStateNormal];
        [button addTarget:self action:@selector(buttonTapped:) forControlEvents:UIControlEventTouchUpInside];
        [self addSubview:button];
    }
    
    if (self.selectedButtons.count > 0) {
        UIBezierPath *path = [UIBezierPath bezierPath];
        for (int i = 0; i < self.selectedButtons.count; i++) {
            UIButton *button = self.selectedButtons[i];
            CGPoint point = button.center;
            if (i == 0) {
                [path moveToPoint:point];
            } else {
                [path addLineToPoint:point];
            }
        }
        [path addLineToPoint:self.currentPoint];
        [[UIColor blueColor] set];
        path.lineWidth = 5.0;
        CGContextAddPath(context, path.CGPath);
        CGContextStrokePath(context);
    }
}

- (void)buttonTapped:(UIButton *)button {
    button.selected = YES;
    [self.selectedButtons addObject:button];
    [self setNeedsDisplay];
}

- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self handleTouches:touches];
}

- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self handleTouches:touches];
}

- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    NSMutableString *path = [NSMutableString string];
    for (UIButton *button in self.selectedButtons) {
        [path appendFormat:@"%ld", button.tag];
    }
    [self.delegate gestureLockView:self didFinishWithPath:path];
    [self reset];
}

- (void)touchesCancelled:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event {
    [self reset];
}

- (void)handleTouches:(NSSet<UITouch *> *)touches {
    UITouch *touch = [touches anyObject];
    CGPoint point = [touch locationInView:self];
    for (UIButton *button in self.subviews) {
        if (CGRectContainsPoint(button.frame, point)) {
            if (![self.selectedButtons containsObject:button]) {
                button.selected = YES;
                [self.selectedButtons addObject:button];
            }
            break;
        }
    }
    self.currentPoint = point;
    [self setNeedsDisplay];
}

- (void)reset {
    for (UIButton *button in self.selectedButtons) {
        button.selected = NO;
    }
    [self.selectedButtons removeAllObjects];
    [self setNeedsDisplay];
}

- (UIImage *)imageWithColor:(UIColor *)color {
    CGRect rect = CGRectMake(0.0f, 0.0f, 1.0f, 1.0f);
    UIGraphicsBeginImageContext(rect.size);
    CGContextRef context = UIGraphicsGetCurrentContext();
    CGContextSetFillColorWithColor(context, [color CGColor]);
    CGContextFillRect(context, rect);
    UIImage *image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();
    return image;
}

@end

在你的视图控制器中，你可以添加一个 GestureLockView 实例，并设置它的 delegate。当手势解锁完成时，GestureLockView 将调用代理方法 gestureLockView:didFinishWithPath:，你可以在这个方法中处理解锁的逻辑。

ViewController.h：

#import <UIKit/UIKit.h>
#import "GestureLockView.h"

@interface ViewController : UIViewController <GestureLockViewDelegate>

@end

ViewController.m：

#import "ViewController.h"

@interface ViewController ()

@property (nonatomic, strong) GestureLockView *lockView;

@end

@implementation ViewController

- (void)viewDidLoad {
    [super viewDidLoad];
    self.view.backgroundColor = [UIColor whiteColor];
    
    self.lockView = [[GestureLockView alloc] initWithFrame:CGRectMake(0, 0, 300, 400)];
    self.lockView.center = self.view.center;
    self.lockView.delegate = self;
    [self.view addSubview:self.lockView];
}

- (void)gestureLockView:(UIView *)lockView didFinishWithPath:(NSString *)path {
    NSLog(@"Path: %@", path);
    if ([path isEqualToString:@"123"]) {
        NSLog(@"Unlock success!");
    } else {
        NSLog(@"Unlock failed!");
    }
}

@end

这里的解锁密码是 "123"。你可以根据需要修改这个密码。