ipadアプリで署名を描いていますが、問題は画像を保存すると署名ビューの境界線も保存されることです。完全な署名ビューではなく、描画領域のみを保存したいここに私のコードがあります
signatureView=[[UIView alloc] initWithFrame:CGRectMake(100,100,800,500)];
signatureView.backgroundColor=[UIColor colorWithRed:242.0/255.f green:242/255.0f blue:242/255.0f alpha:1];
signatureView.layer.borderWidth =4;
signatureView.layer.borderColor = [UIColor colorWithRed:23.0/255.0f green:190/255.0f blue:210/255.0f alpha:1].CGColor;
signatureView.layer.cornerRadius=30;
[self.view addSubview:signatureView];
UIButton*OkButton = [UIButton buttonWithType:UIButtonTypeCustom];
[OkButton setFrame:CGRectMake(320,448,118,49)];
[OkButton setTitle:@"OK" forState:UIControlStateNormal];
[OkButton setImage:[UIImage imageNamed:@"okT.png"] forState:UIControlStateNormal];
[OkButton addTarget:self action:@selector(onOKButtonClick) forControlEvents:UIControlEventTouchUpInside];
[signatureView addSubview:OkButton];
UILabel*textLabel=[[UILabel alloc] initWithFrame:CGRectMake(20,6,300,50)];
textLabel.font=[UIFont fontWithName:@"Helvetica-Bold" size:16];
textLabel.text=@"Use the touchscreen to sign here";
textLabel.backgroundColor=[UIColor clearColor];
textLabel.textColor=[UIColor grayColor];
[signatureView addSubview:textLabel];
drawScreen=[[MyLineDrawingView alloc]initWithFrame:CGRectMake(10,50,780,400)];
[signatureView addSubview:drawScreen];
[drawScreen release];
//MyLineDrwaingView
@interface MyLineDrawingView : UIView {
UIBezierPath *myPath;
UIColor *brushPattern;
}
@end
#import "MyLineDrawingView.h"
@implementation MyLineDrawingView
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
// Initialization code
self.backgroundColor=[UIColor whiteColor];
myPath=[[UIBezierPath alloc]init];
myPath.lineCapStyle=kCGLineCapRound;
myPath.miterLimit=0;
myPath.lineWidth=10;
//brushPattern=[UIColor redColor];
brushPattern=[UIColor blackColor];
}
return self;
}
// Only override drawRect: if you perform custom drawing.
// An empty implementation adversely affects performance during animation.
- (void)drawRect:(CGRect)rect
{
[brushPattern setStroke];
[myPath strokeWithBlendMode:kCGBlendModeNormal alpha:1.0];
}
#pragma mark - Touch Methods
-(void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
[myPath moveToPoint:[mytouch locationInView:self]];
}
-(void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
{
UITouch *mytouch=[[touches allObjects] objectAtIndex:0];
[myPath addLineToPoint:[mytouch locationInView:self]];
[self setNeedsDisplay];
}
-(void)onOKButtonClick {
CGRect rect = [drawScreen bounds]; //use your signature view's Rect means Frame;
UIGraphicsBeginImageContext(rect.size);
CGContextRef context = UIGraphicsGetCurrentContext();
[signatureView.layer renderInContext:context]; //this line is also important for you
UIImage *img = UIGraphicsGetImageFromCurrentImageContext();
signImageView.image = img;
}