iOS手写签批_app_内存溢出

废话不说，直接上代码

封装.h

////  SignatureVIEw.h//  copyright © 2019 dev. All rights reserved.//#import <UIKit/UIKit.h>@interface SignatureVIEw : UIVIEw/** * 获取签名图片 */- (UIImage *)getSignatureImage;/** * 清除签名 */- (voID)clearSignature;@end

封装.m

////  SignatureVIEw.m//  copyright © 2019 dev. All rights reserved.//#import "SignatureVIEw.h"@interface SignatureVIEw (){    CGPoint points[5];}@property(nonatomic,assign) NSInteger control;@property(nonatomic,strong) UIBezIErPath *beizerPath;@end@implementation SignatureVIEw- (instancetype)initWithFrame:(CGRect)frame{    self = [super initWithFrame:frame];    if (self) {        self.backgroundcolor = [UIcolor clearcolor];        [self setMultipletouchEnabled:NO];        self.beizerPath = [UIBezIErPath bezIErPath];        [self.beizerPath setlinewidth:2];    }    return self;}#pragma mark - 绘图 *** 作- (voID)drawRect:(CGRect)rect{    //设置签名的颜色    UIcolor *strokecolor = [UIcolor blackcolor];    [strokecolor setstroke];        //签名的路径绘制    [self.beizerPath stroke];}- (voID)touchesBegan:(NSSet<UItouch *> *)touches withEvent:(UIEvent *)event{    self.control = 0;    UItouch *touch = [touches anyObject];    points[0] = [touch locationInVIEw:self];    CGPoint startPoint = points[0];    CGPoint endPoint = CGPointMake(startPoint.x + 1.5,startPoint.y + 2);    [self.beizerPath movetoPoint:startPoint];    [self.beizerPath addlinetoPoint:endPoint];}- (voID)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event{    UItouch *touch = [touches anyObject];    CGPoint touchPoint = [touch locationInVIEw:self];    _control++;    points[_control] = touchPoint;        if (_control == 4){        points[3] = CGPointMake((points[2].x + points[4].x)/2.0,(points[2].y + points[4].y)/2.0);                //设置画笔起始点        [self.beizerPath movetoPoint:points[0]];                //endPoint终点 controlPoint1、controlPoint2控制点        [self.beizerPath addCurvetoPoint:points[3] controlPoint1:points[1] controlPoint2:points[2]];                //setNeedsdisplay会自动调用drawRect方法，这样可以拿到UIGraphicsGetCurrentContext，就可以画画了        [self setNeedsdisplay];                points[0] = points[3];        points[1] = points[4];        _control = 1;    }}#pragma mark - 清除签名- (voID)clearSignature{    [self.beizerPath removeAllPoints];    [self setNeedsdisplay];}#pragma mark - 获取图片- (UIImage *)getSignatureImage {    //设置为NO，UIVIEw是透明这里的图片就是透明的    UIGraphicsBeginImageContextWithOptions(self.bounds.size,NO,[UIScreen mainScreen].scale);    [self.layer renderInContext:UIGraphicsGetCurrentContext()];        UIImage *signatureImage = UIGraphicsGetimageFromCurrentimageContext();    UIGraphicsEndImageContext();    Nsstring* docDir = [Nsstring stringWithFormat:@"%@/documents/Image",NSHomeDirectory()];    [[NSfileManager defaultManager] createDirectoryAtPath:docDir withIntermediateDirectorIEs:YES attributes:nil error:nil];    Nsstring *path = [Nsstring stringWithFormat:@"%@/documents/Image/IMAGE.png",NSHomeDirectory()];        //用png是透明的    [UIImagePNGRepresentation(signatureImage) writetofile: path atomically:YES];//    [UIImageJPEGRepresentation(signatureImage,0.0001) writetofile: path atomically:YES];//jpeg用这个return signatureImage;}@end

在vc里面使用

例如：

////  SignatureVIEwController.h//  copyright © 2019 dev. All rights reserved.//#import <UIKit/UIKit.h>@interface SignatureVIEwController : UIVIEwController@property(nonatomic,strong)CommenModel *contentModel;@end

////  SignatureVIEwController.m//  copyright © 2019 dev. All rights reserved.//#import "SignatureVIEwController.h"#import "SignatureVIEw.h"#define kScreenHeight [UIScreen mainScreen].bounds.size.height#define kScreenWIDth [UIScreen mainScreen].bounds.size.wIDth#define YYEncode(str) [str dataUsingEnCoding:NSUTF8StringEnCoding]#define kBOUNDARY @"abc"@interface SignatureVIEwController ()@property(nonatomic,strong) SignatureVIEw *signVIEw;@property(nonatomic,strong) UIImageVIEw *imageVIEw;@end@implementation SignatureVIEwController- (voID)vIEwDIDLoad {    [super vIEwDIDLoad];    // Do any additional setup after loading the vIEw.    self.vIEw.backgroundcolor = [UIcolor whitecolor];        [self addtopNavibarWithTitle:@"签名"];    //画布    UIVIEw *backVIEw = [[UIVIEw alloc] initWithFrame:CGRectMake(0,SafeAreatopHeight,kScreenWIDth,200)];    backVIEw.layer.borderWIDth = 2;    backVIEw.layer.bordercolor = [[UIcolor redcolor] CGcolor];    [self.vIEw addSubvIEw:backVIEw];    self.signVIEw = [[SignatureVIEw alloc] initWithFrame:backVIEw.bounds];    [backVIEw addSubvIEw:self.signVIEw];                UIbutton *reSignBtn = [UIbutton buttonWithType:UIbuttonTypeCustom];    reSignBtn.backgroundcolor = NAVIbar_color_DEFAulT;    [reSignBtn setTitle:@"重签" forState:UIControlStatenormal];    [reSignBtn setFrame:CGRectMake(20,SafeAreatopHeight+200+10,(self.vIEw.wIDth - 20*3)*0.5,40)];    reSignBtn.layer.cornerRadius = 5.0;    reSignBtn.clipsToBounds = YES;    reSignBtn.TitleLabel.Font = [UIFont systemFontOfSize:17];    [reSignBtn addTarget:self action:@selector(clearBtnClick) forControlEvents:UIControlEventtouchUpInsIDe];    [self.vIEw addSubvIEw:reSignBtn];            UIbutton *confirmBtn = [UIbutton buttonWithType:UIbuttonTypeCustom];    [confirmBtn setTitle:@"确认" forState:UIControlStatenormal];    confirmBtn.backgroundcolor = NAVIbar_color_DEFAulT;    confirmBtn.TitleLabel.Font = [UIFont systemFontOfSize:17.0];    confirmBtn.frame = CGRectMake(CGRectGetMaxX(reSignBtn.frame)+20,reSignBtn.origin.y,reSignBtn.wIDth,reSignBtn.height);    confirmBtn.layer.cornerRadius = 5.0;    confirmBtn.clipsToBounds = YES;    [confirmBtn addTarget:self action:@selector(imageBtnClick) forControlEvents:UIControlEventtouchUpInsIDe];    [self.vIEw addSubvIEw:confirmBtn];        }#pragma mark----导航栏-(voID)addtopNavibarWithTitle:(Nsstring *)Title{    UIVIEw *navibar = [[UIVIEw alloc]initWithFrame:CGRectMake(0,0,JX_SCREEN_WIDTH,SafeAreatopHeight)];    UIcolor *navicolor = NAVIbar_color_DEFAulT;    navibar.backgroundcolor = navicolor;        if(Title.length)    {                UILabel *TitleLabel = [[UILabel alloc]initWithFrame:CGRectMake(0,0,JX_SCREEN_WIDTH-40-40,132.0 / SCALE)];                TitleLabel.Font = Title_Font_SIZE;        TitleLabel.textcolor = [UIcolor whitecolor];        TitleLabel.textAlignment =  IFLY_AliGN_CENTER;        [TitleLabel setCenter:CGPointMake(navibar.center.x,navibar.center.y + SCREEN_Y / 2.0)];        [navibar addSubvIEw:TitleLabel];        TitleLabel.hIDden = NO;        TitleLabel.text = Title;    }else{            }    UIbutton *backBottomBtn = [[UIbutton alloc]initWithFrame:CGRectMake(0,SCREEN_Y,60,44)];    backBottomBtn.backgroundcolor = [UIcolor clearcolor];    [backBottomBtn addTarget:self action:@selector(goBack) forControlEvents:UIControlEventtouchUpInsIDe];    [navibar addSubvIEw:backBottomBtn];    UIbutton *backbutton = [[UIbutton alloc]initWithFrame:CGRectMake(36.0 / SCALE,SCREEN_Y+ (44-66.0 / SCALE)/2,66.0 / SCALE,66.0 / SCALE)];    [backbutton setimage:[UIImage imagenamed:@"Right"] forState:UIControlStatenormal];    [backbutton addTarget:self action:@selector(goBack) forControlEvents:UIControlEventtouchUpInsIDe];    [navibar addSubvIEw:backbutton];    [self.vIEw addSubvIEw:navibar];}-(voID)goBack{    [self.navigationController popVIEwControllerAnimated:YES];}#pragma mark - 清楚图片- (voID)clearBtnClick{    [self.signVIEw clearSignature];}#pragma mark - 生成图片- (voID)imageBtnClick{    UIImage *image  =  [self.signVIEw getSignatureImage];
   //拿到图片做你想做的吧
   /********************/}@end