NJLockView.h /.m

@class NJLockView;

@protocol NJLockViewDelegate <NSObject>

- (void)lockViewDidClick:(NJLockView *)lockView andPwd:(NSString *)pwd;

@end

@interface NJLockView : UIView

@property (nonatomic, weak)IBOutlet id<NJLockViewDelegate> delegate;
@end
@interface NJLockView ()

@property (nonatomic, strong) NSMutableArray *buttons;
/**
* 定义属性,记录用户当前手指的位置(非按钮范围内)
*/
@property (nonatomic, assign) CGPoint currentPoint;
@end @implementation NJLockView - (NSMutableArray *)buttons
{
if (_buttons == nil) {
_buttons = [NSMutableArray array];
}
return _buttons;
} // 当视图是通过代码创建出来的就会调用initWithFrame
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
// NSLog(@"initWithFrame");
[self setup];
}
return self;
} // 当视图从xib或storyboard中创建出来就会调用
- (id)initWithCoder:(NSCoder *)aDecoder
{
if (self = [super initWithCoder:aDecoder]) {
// 创建9个按钮
// NSLog(@"initWithCoder");
[self setup]; }
return self;
} /**
* 创建9个按钮添加到自定view中
*/
- (void)setup
{
for (int i = ; i < ; i++) {
// 1.创建按钮
UIButton *btn = [UIButton buttonWithType:UIButtonTypeCustom];
// 2.设置按钮的背景图片
[btn setBackgroundImage:[UIImage imageNamed:@"gesture_node_normal"] forState:UIControlStateNormal]; [btn setBackgroundImage:[UIImage imageNamed:@"gesture_node_highlighted"] forState:UIControlStateSelected]; // 3.添加按钮到View
[self addSubview:btn]; // btn.backgroundColor = [UIColor redColor]; // 4.禁止按钮的点击事件(因为我们需要监听触摸事件)
btn.userInteractionEnabled = NO; // 5.设置按钮的tag作为唯一标识
btn.tag = i;
}
} - (void)layoutSubviews
{
[super layoutSubviews];
// 设置按钮的frame
for (int i = ; i < self.subviews.count; i++) {
// 1.取出对应位置的按钮
UIButton *btn = self.subviews[i]; // 2.设置frame
CGFloat btnW = ;
CGFloat btnH = ;
// 2.1计算间距
CGFloat margin = (self.frame.size.width - ( * btnW)) / ;
int col = i % ; // 列号
int row = i / ; // 行号
// 间距 + 列号 * (按钮宽度+ 间距)
CGFloat btnX = margin + col * (btnW + margin);
CGFloat btnY = margin + row * (btnW + margin); btn.frame = CGRectMake(btnX, btnY, btnW, btnH);
} } - (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
// 1.获取按下的点
CGPoint startPoint = [self getCurrentTouchPoint:touches]; // 2.判断触摸的位置是否在按钮的范围内
UIButton *btn = [self getCurrentBtnWithPoint:startPoint]; // 存储按钮
if (btn)
{
// 设置选中状态
btn.selected = YES;
// 将按钮保存到数组中
[self.buttons addObject:btn];
} btn.selected = YES; // [self setNeedsDisplay]; } - (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
// 1.获取按下的点
CGPoint movePoint = [self getCurrentTouchPoint:touches];
// 2.获取触摸的按钮
UIButton *btn = [self getCurrentBtnWithPoint:movePoint]; // 存储按钮
if (btn && btn.selected != YES)
{
// 设置选中状态
btn.selected = YES;
// 将按钮保存到数组中
[self.buttons addObject:btn];
}
// 记录当前手指移动的位置
self.currentPoint = movePoint; // 通知view绘制线段
[self setNeedsDisplay]; } - (void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event
{ // 取出用户输入的密码
NSMutableString *result = [NSMutableString string];
for (UIButton *btn in self.buttons) {
[result appendFormat:@"%d", btn.tag ];
}
// NSLog(@"result = %@", result);
// 通知代理,告诉代理用户输入的密码
if ([self.delegate respondsToSelector:@selector(lockViewDidClick:andPwd:)]) {
[self.delegate lockViewDidClick:self andPwd:result];
} [self.buttons makeObjectsPerformSelector:@selector(setSelected:) withObject:@(NO)]; // 清空数组
[self.buttons removeAllObjects];
[self setNeedsDisplay]; // 清空currentPoint
self.currentPoint = CGPointZero;
} - (void)drawRect:(CGRect)rect
{ CGContextRef ctx = UIGraphicsGetCurrentContext(); // 清空上下文
CGContextClearRect(ctx, rect); // 从数组中取出所有的按钮, 连接所有按钮的中点
for (int i = ; i < self.buttons.count; i++) {
// 取出按钮
UIButton *btn = self.buttons[i];
if ( == i) {
CGContextMoveToPoint(ctx, btn.center.x, btn.center.y);
}else
{
CGContextAddLineToPoint(ctx, btn.center.x, btn.center.y);
}
} // 判断如果当前点是00就不会只
// if (!CGPointEqualToPoint(self.currentPoint, CGPointZero)) {
//
// // 当所有的按钮的中点都连接号之后再连接手指当前的位置
// CGContextAddLineToPoint(ctx, self.currentPoint.x, self.currentPoint.y);
// } // 判断数组中是否有按钮, 如果有按钮就有起点, 有起点就不会报错
if (self.buttons.count != ) { CGContextAddLineToPoint(ctx, self.currentPoint.x, self.currentPoint.y);
} // [[UIColor greenColor] set]; [[UIColor colorWithRed:/255.0 green:/255.0 blue:/255.0 alpha:0.5] set];
CGContextSetLineWidth(ctx, );
CGContextSetLineJoin(ctx, kCGLineJoinRound);
CGContextSetLineCap(ctx, kCGLineCapRound);
CGContextStrokePath(ctx);
} /**
* 根据系统传入的UITouch集合获取当前触摸的点
* @return 当初触摸的点
*/
- (CGPoint)getCurrentTouchPoint:(NSSet *)touches
{
// 1.获取按下的点
UITouch *touch = [touches anyObject];
CGPoint point = [touch locationInView:touch.view];
return point;
} /**
* 根据触摸点获取触摸到的按钮
* @return 触摸的按钮
*/
- (UIButton *)getCurrentBtnWithPoint:(CGPoint)point
{
// 2.判断触摸的位置是否在按钮的范围内
for (UIButton *btn in self.subviews) {
//
if (CGRectContainsPoint(btn.frame, point)) {
return btn;
}
}
return nil;
}
@end

调用

#import "NJViewController.h"
#import "NJLockView.h" @interface NJViewController ()<NJLockViewDelegate> @end @implementation NJViewController - (void)viewDidLoad
{
[super viewDidLoad]; } - (void)lockViewDidClick:(NJLockView *)lockView andPwd:(NSString *)pwd
{
NSLog(@"NJViewController %@", pwd);
} @end
05-13 17:36
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