2016-1-10 手勢解鎖demo的實現

一：實現自定義view，在.h,.m文件中代碼如下:

#import <UIKit/UIKit.h>
@class ZLLockView;
@protocol ZLLockViewDelegate <NSObject>
- (void)lockView:(ZLLockView *)lockView didSelectedPwd: (NSString *)pwd;
@end
@interface ZLLockView : UIView
@property (nonatomic, weak) id<ZLLockViewDelegate> delegate;@end

//
//  ZLLockView.m
//  手勢解鎖demo實現
//
//  Created by Mac on 16/1/9.
//  Copyright ? 2016年 Mac. All rights reserved.
//

#import "ZLLockView.h"
@interface ZLLockView()
@property (nonatomic, strong) NSMutableArray *btnsSelected;@property (nonatomic, assign) CGPoint lastPoint;@end
@implementation ZLLockView
- (NSMutableArray *)btnsSelected
{if (!_btnsSelected) {_btnsSelected = [NSMutableArray array];}return _btnsSelected;
}
- (instancetype)init
{if (self = [super init]) {[self setBtn];}return self;
}
- (void)setBtn
{for (int i = 0; i < 9; i ++) {UIButton *btn = [[UIButton alloc] init];btn.tag = i;[btn setImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal];[btn setImage:[UIImage imageNamed:@"gesture_node_highlighted"] forState:UIControlStateSelected];btn.userInteractionEnabled = NO;[self addSubview:btn];}
}// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect {// Drawing codeUIBezierPath *path = [UIBezierPath bezierPath];path.lineWidth = 7;path.lineCapStyle = kCGLineCapRound;path.lineJoinStyle = kCGLineJoinRound;[[UIColor blueColor] set];NSInteger count = self.btnsSelected.count;if (count ==0)return;for (NSInteger i = 0; i < count; i ++) {UIButton *btn = self.btnsSelected[i];if (i == 0) {[path moveToPoint:btn.center];}else{[path addLineToPoint:btn.center];}}[path addLineToPoint:self.lastPoint];[path stroke];
}- (void)layoutSubviews
{CGFloat btnW = 74;CGFloat btnH = 74;
//    間距CGFloat padding = (self.frame.size.width - btnW * 3) / 4;NSInteger count = self.subviews.count;for (NSInteger i = 0; i < count; i ++) {UIButton *btn =  self.subviews[i];
//        當前按鈕所處的列NSInteger column = i % 3;
//        計算btn的x值CGFloat btnX = (column+1) * padding + column * btnW;
//        當前按鈕所處的行CGFloat row = i / 3;CGFloat btnY = (row+1) * padding + row * btnW;btn.frame = CGRectMake(btnX, btnY, btnW, btnH);}
}
- (void)touchesBegan:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{[self touchesMoved:touches withEvent:event];
}
- (void)touchesMoved:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{
//    獲取當前點UITouch *touch = [touches anyObject];CGPoint location =  [touch locationInView:touch.view];//    判斷在不在范圍內for (UIButton *btn  in self.subviews) {if (CGRectContainsPoint(btn.frame, location)) {//判斷獲得的點在不在范圍內//將選中的按鈕放在數組里if (btn.selected == NO) {[self.btnsSelected addObject:btn];}[btn setSelected:YES];}else self.lastPoint = location;}[self setNeedsDisplay];
}
- (void)touchesEnded:(NSSet<UITouch *> *)touches withEvent:(UIEvent *)event
{NSMutableString *pwd = [NSMutableString string];for (UIButton *btn in self.btnsSelected) {[btn setSelected:NO];//拼接選中按鈕的索引[pwd appendFormat:@"%ld",btn.tag];[self setNeedsDisplay];}[self.btnsSelected removeAllObjects];NSLog(@"%@",pwd);[self.delegate lockView:self didSelectedPwd:pwd];
}
@end

二：在控制器中實現代理方法，代碼如下：

//
//  ViewController.m
//  手勢解鎖demo實現
//
//  Created by Mac on 16/1/9.
//  Copyright ? 2016年 Mac. All rights reserved.
//

#import "ViewController.h"
#import "ZLLockView.h"
#import "MBProgressHUD+CZ.h"
@interface ViewController ()<ZLLockViewDelegate>
@property (nonatomic, strong) ZLLockView *lockView;@end@implementation ViewController- (void)viewDidLoad {[super viewDidLoad];self.view.backgroundColor = [UIColor colorWithPatternImage:[UIImage imageNamed:@"Home_refresh_bg"]];// Do any additional setup after loading the view, typically from a nib.ZLLockView *lockView = [[ZLLockView alloc] init];CGFloat screenW = [UIScreen mainScreen].bounds.size.width;lockView.frame = CGRectMake(0, 0, screenW, screenW);lockView.center = self.view.center;lockView.backgroundColor = [UIColor clearColor];[self.view addSubview:lockView];self.lockView = lockView;lockView.delegate = self;}
- (void) lockView:(ZLLockView *)lockView didSelectedPwd:(NSString *)pwd
{if ([pwd isEqual:@"012345678"]) {[MBProgressHUD showMessage:@"密碼正確!"];[self.lockView removeFromSuperview];dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(1 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{[MBProgressHUD hideHUD];});}else{[MBProgressHUD showMessage:@"密碼錯誤!"];dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(2 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{[MBProgressHUD hideHUD];});}
}- (void)didReceiveMemoryWarning {[super didReceiveMemoryWarning];// Dispose of any resources that can be recreated.
}@end

三：效果：