iOS集成可手势签名的视图

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1.h文件设置可供外界调用的方法

#import <UIKit/UIKit.h>

@interface MyView : UIView

@property(copy,nonatomic)NSString *tagStr;

// get point in view

-(void)addPA:(CGPoint)nPoint;

-(void)addLA;

-(void)revocation;

-(void)refrom;

-(void)clear;

-(void)setLineColor:(NSInteger)color;

-(void)setlineWidth:(NSInteger)width;

@end

2.m文件内部实现

#import "MyView.h"

@implementation MyView

//保存线条颜色

static NSMutableArray *colorArray;

//保存被移除的线条颜色

static NSMutableArray *deleColorArray;

//每次触摸结束前经过的点，形成线的点数组

static NSMutableArray *pointArray;

//每次触摸结束后的线数组

static NSMutableArray *lineArray;

//删除的线的数组，方便重做时取出来

static NSMutableArray *deleArray;

//线条宽度的数组

static float lineWidthArray[10]={5.0,10.0,12.0,14.0,16.0,20.0,22.0,24.0,26.0,28.0};

//删除线条时删除的线条宽度储存的数组

static NSMutableArray *deleWidthArray;

//正常存储的线条宽度的数组

static NSMutableArray *WidthArray;

//确定颜色的值，将颜色计数的值存到数组里默认为0，即为绿色

static int colorCount;

//确定宽度的值，将宽度计数的值存到数组里默认为0，即为10

static int widthCount;

//保存颜色的数组

static NSMutableArray *colors;

- (id)initWithFrame:(CGRect)frame

{

self = [superinitWithFrame:frame];

if (self) {

//初始化颜色数组，将用到的颜色存储到数组里

colors=[NSMutableArrayarrayWithObjects:[UIColorblackColor],[UIColorgreenColor],[UIColorblueColor],[UIColorredColor],[UIColorblackColor],[UIColorwhiteColor], nil];

WidthArray=[NSMutableArrayarray];

deleWidthArray=[NSMutableArrayarray];

pointArray=[NSMutableArrayarray];

lineArray=[NSMutableArrayarray];

deleArray=[NSMutableArrayarray];

colorArray=[NSMutableArrayarray];

deleColorArray=[NSMutableArrayarray];

//颜色和宽度默认都取当前数组第0位为默认值

colorCount=0;

widthCount=0;

// Initialization code

}

returnself;

}

//给界面按钮操作时获取tag值作为width的计数。来确定宽度，颜色同理

-(void)setlineWidth:(NSInteger)width{

widthCount=width;

}

-(void)setLineColor:(NSInteger)color{

colorCount=color;

}

// Only override drawRect: if you perform custom drawing.

// An empty implementation adversely affects performance during animation.

//uiview默认的drawRect方法，覆盖重写，可在界面上重绘，并将AViewController.xib的文件设置为自定义的MyView

- (void)drawRect:(CGRect)rect

{

//获取当前上下文，

CGContextRef context=UIGraphicsGetCurrentContext();

CGContextBeginPath(context);

CGContextSetLineWidth(context,10.0f);

//线条拐角样式，设置为平滑

CGContextSetLineJoin(context,kCGLineJoinRound);

//线条开始样式，设置为平滑

CGContextSetLineCap(context,kCGLineJoinRound);

//查看lineArray数组里是否有线条，有就将之前画的重绘，没有只画当前线条

if ([lineArraycount]>0) {

for (int i=0; i<[lineArraycount]; i++) {

NSArray * array=[NSArray

arrayWithArray:[lineArrayobjectAtIndex:i]];

if ([arraycount]>0)

{

CGContextBeginPath(context);

CGPoint myStartPoint=CGPointFromString([arrayobjectAtIndex:0]);

CGContextMoveToPoint(context, myStartPoint.x, myStartPoint.y);

for (int j=0; j<[arraycount]-1; j++)

{

CGPoint myEndPoint=CGPointFromString([arrayobjectAtIndex:j+1]);

//--------------------------------------------------------

CGContextAddLineToPoint(context, myEndPoint.x,myEndPoint.y);

}

//获取colorArray数组里的要绘制线条的颜色

NSNumber *num=[colorArrayobjectAtIndex:i];

int count=[numintValue];

UIColor *lineColor=[colorsobjectAtIndex:count];

//获取WidthArray数组里的要绘制线条的宽度

NSNumber *wid=[WidthArrayobjectAtIndex:i];

int widthc=[widintValue];

float width=lineWidthArray[widthc];

//设置线条的颜色，要取uicolor的CGColor

CGContextSetStrokeColorWithColor(context,[lineColorCGColor]);

//-------------------------------------------------------

//设置线条宽度

CGContextSetLineWidth(context, width);

//保存自己画的

CGContextStrokePath(context);

}

//画当前的线

if ([pointArraycount]>0)

{

CGContextBeginPath(context);

CGPoint myStartPoint=CGPointFromString([pointArrayobjectAtIndex:0]);

CGContextMoveToPoint(context, myStartPoint.x, myStartPoint.y);

for (int j=0; j<[pointArraycount]-1; j++)

{

CGPoint myEndPoint=CGPointFromString([pointArrayobjectAtIndex:j+1]);

//--------------------------------------------------------

CGContextAddLineToPoint(context, myEndPoint.x,myEndPoint.y);

}

UIColor *lineColor=[colorsobjectAtIndex:colorCount];

float width=lineWidthArray[widthCount];

CGContextSetStrokeColorWithColor(context,[lineColorCGColor]);

//-------------------------------------------------------

CGContextSetLineWidth(context, width);

CGContextStrokePath(context);

}

//在touch结束前将获取到的点，放到pointArray里

-(void)addPA:(CGPoint)nPoint{

NSString *sPoint=NSStringFromCGPoint(nPoint);

[pointArrayaddObject:sPoint];

}

//在touchend时，将已经绘制的线条的颜色，宽度，线条线路保存到数组里

-(void)addLA{

NSNumber *wid=[[NSNumberalloc]initWithInt:widthCount];

NSNumber *num=[[NSNumberalloc]initWithInt:colorCount];

[colorArrayaddObject:num];

[WidthArrayaddObject:wid];

NSArray *array=[NSArrayarrayWithArray:pointArray];

[lineArrayaddObject:array];

pointArray=[[NSMutableArrayalloc]init];

}

#pragma mark -

//手指开始触屏开始

static CGPoint MyBeganpoint;

-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event

{

UILabel * label = (UILabel *)self.superview;

label.text =@"";

}

//手指移动时候发出

-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event

{

self.tagStr =@"kk";

UITouch* touch=[touchesanyObject];

MyBeganpoint=[touchlocationInView:self];

NSString *sPoint=NSStringFromCGPoint(MyBeganpoint);

[pointArrayaddObject:sPoint];

[selfsetNeedsDisplay];

}

//当手指离开屏幕时候

-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event

{

[selfaddLA];

NSLog(@"touches end");

}

//电话呼入等事件取消时候发出

-(void)touchesCancelled:(NSSet *)touches withEvent:(UIEvent *)event

{

NSLog(@"touches Canelled");

}

//撤销，将当前最后一条信息移动到删除数组里，方便恢复时调用

-(void)revocation{

if ([lineArraycount]) {

[deleArrayaddObject:[lineArraylastObject]];

[lineArrayremoveLastObject];

}

if ([colorArraycount]) {

[deleColorArrayaddObject:[colorArraylastObject]];

[colorArrayremoveLastObject];

}

if ([WidthArraycount]) {

[deleWidthArrayaddObject:[WidthArraylastObject]];

[WidthArrayremoveLastObject];

}

//界面重绘方法

[selfsetNeedsDisplay];

}

//将删除线条数组里的信息，移动到当前数组，在主界面重绘

-(void)refrom{

if ([deleArraycount]) {

[lineArrayaddObject:[deleArraylastObject]];

[deleArrayremoveLastObject];

}

if ([deleColorArraycount]) {

[colorArrayaddObject:[deleColorArraylastObject]];

[deleColorArrayremoveLastObject];

}

if ([deleWidthArraycount]) {

[WidthArrayaddObject:[deleWidthArraylastObject]];

[deleWidthArrayremoveLastObject];

}

[selfsetNeedsDisplay];

}

-(void)clear{

UILabel * label = (UILabel *)self.superview;

label.text =@"请使用正楷签名";

self.tagStr =nil;

//移除所有信息并重绘

[deleArrayremoveAllObjects];

[deleColorArrayremoveAllObjects];

colorCount=0;

[colorArrayremoveAllObjects];

[lineArrayremoveAllObjects];

[pointArrayremoveAllObjects];

[deleWidthArrayremoveAllObjects];

widthCount=0;

[WidthArrayremoveAllObjects];

[selfsetNeedsDisplay];

}

@end

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