画线触摸事件在iPhone的全屏模式下无法完美运行 [英] Draw lines a touches event not work perfectly on FullScreen mode in iphone

问题描述

我正在创建可成功在iphone上绘制的应用程序.但是，仅在状态栏中最初隐藏状态栏= myapp-info.plist中没有，否则，设置状态栏最初处于隐藏状态=是无法正常工作.我的视图控制器代码如下:

 -(void)viewDidLoad {[super viewDidLoad];drawImage = [[UIImageView alloc] initWithImage:nil];drawImage.frame = self.view.frame;drawImage.backgroundColor = [UIColor blackColor];[self.view addSubview:drawImage];mouseMoved = 0;}-(void)touchesBegan:(NSSet *)touch withEvent:(UIEvent *)event {mouseSwiped =否；UITouch * touch = [触摸anyObject];如果([touch tapCount] == 2){drawImage.image = nil;返回;}lastPoint = [touch locationInView:self.view];//lastPoint.y-= 20;}-(void)viewDidAppear:(BOOL)动画{//[UIApplication sharedApplication] .statusBarHidden = NO;}-(void)touchesMoved:(NSSet *)touch withEvent:(UIEvent *)event {mouseSwiped =是；UITouch * touch = [触摸anyObject];CGPoint currentPoint = [触摸locationInView:self.view];currentPoint.y-= 20;//仅适用于'kCGLineCapRound'UIGraphicsBeginImageContext(self.view.frame.size);//Albert Renshaw-Apps4Life[drawImage.image drawInRect:CGRectMake(0，0，drawImage.frame.size.width，drawImage.frame.size.height)]；//最初为self.frame.size.width，self.frame.size.height)]；CGContextSetLineCap(UIGraphicsGetCurrentContext()，kCGLineCapRound);//kCGLineCapSquare，kCGLineCapButt，kCGLineCapRoundCGContextSetLineWidth(UIGraphicsGetCurrentContext()，5.0);//尺寸CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext()，0.0，1.0，0.0，1.0);//R，G，B和Alpha的值CGContextBeginPath(UIGraphicsGetCurrentContext());CGContextMoveToPoint(UIGraphicsGetCurrentContext()，lastPoint.x，lastPoint.y);CGContextAddLineToPoint(UIGraphicsGetCurrentContext()，currentPoint.x，currentPoint.y);CGContextStrokePath(UIGraphicsGetCurrentContext());drawImage.image = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();lastPoint = currentPoint;mouseMoved ++;如果(mouseMoved == 10){mouseMoved = 0;}}-(void)touchesEnded:(NSSet *)touches withEvent:(UIEvent *)event {UITouch * touch = [触摸anyObject];如果([touch tapCount] == 2){drawImage.image = nil;返回;}if(！mouseSwiped){//如果颜色==绿色UIGraphicsBeginImageContext(self.view.frame.size);[drawImage.image drawInRect:CGRectMake(0，0，drawImage.frame.size.width，drawImage.frame.size.height)]];//最初为self.frame.size.width，self.frame.size.height)]；CGContextSetLineCap(UIGraphicsGetCurrentContext()，kCGLineCapRound);//kCGLineCapSquare，kCGLineCapButt，kCGLineCapRoundCGContextSetLineWidth(UIGraphicsGetCurrentContext()，10.0);CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext()，0.0，1.0，0.0，1.0);CGContextMoveToPoint(UIGraphicsGetCurrentContext()，lastPoint.x，lastPoint.y);CGContextAddLineToPoint(UIGraphicsGetCurrentContext()，lastPoint.x，lastPoint.y);CGContextStrokePath(UIGraphicsGetCurrentContext());CGContextFlush(UIGraphicsGetCurrentContext());drawImage.image = UIGraphicsGetImageFromCurrentImageContext();UIGraphicsEndImageContext();}}-(void)didReceiveMemoryWarning {//如果没有超级视图，则释放视图.[super didReceiveMemoryWarning];//释放所有未使用的缓存数据，图像等.}-(void)viewDidUnload {[self setDrawImage:nil];[self setMy_view:nil];//释放主视图的所有保留子视图.//例如self.myOutlet = nil;}-(void)dealloc {[my_view版本]；[drawImage发布]；[super dealloc];} 

此代码在没有全屏模式的情况下也可以正常运行.否则，不能像下面的输出一样工作:

请任何人帮助我们提供任何代码或示例...！

谢谢..

解决方案

从
-(void)viewDidLoad 中移动 drawImage.frame = self.view.frame; code>方法
到
-(void)viewWillAppear:(BOOL)动画
应该在viewWillAppear或viewDidAppear中进行任何几何调整.

I am create app to draw on iphone Sucessfully.But,it's work only set Status bar is initially hidden = No in myapp-info.plist.else if,set Status bar is initially hidden=yes don't working Perfectly.My viewcontroller code is Below:

- (void)viewDidLoad {
    [super viewDidLoad];
    drawImage = [[UIImageView alloc] initWithImage:nil];
    drawImage.frame = self.view.frame;
    drawImage.backgroundColor=[UIColor blackColor];
    [self.view addSubview:drawImage];
    mouseMoved = 0;
}

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

    mouseSwiped = NO;
    UITouch *touch = [touches anyObject];

    if ([touch tapCount] == 2) {
        drawImage.image = nil;
        return;
    }

    lastPoint = [touch locationInView:self.view];
    //lastPoint.y -= 20;

}

-(void)viewDidAppear:(BOOL)animated
{
 // [UIApplication sharedApplication].statusBarHidden = NO;
}

- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event {
    mouseSwiped = YES;
    UITouch *touch = [touches anyObject];   
    CGPoint currentPoint = [touch locationInView:self.view];
    currentPoint.y -= 20; // only for 'kCGLineCapRound'
    UIGraphicsBeginImageContext(self.view.frame.size);
    //Albert Renshaw - Apps4Life
    [drawImage.image drawInRect:CGRectMake(0, 0, drawImage.frame.size.width, drawImage.frame.size.height)]; //originally self.frame.size.width, self.frame.size.height)];
    CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); //kCGLineCapSquare, kCGLineCapButt, kCGLineCapRound
    CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 5.0); // for size
    CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.0, 1.0, 0.0, 1.0); //values for R, G, B, and Alpha
    CGContextBeginPath(UIGraphicsGetCurrentContext());
    CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
    CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), currentPoint.x, currentPoint.y);
    CGContextStrokePath(UIGraphicsGetCurrentContext());
    drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
    UIGraphicsEndImageContext();

    lastPoint = currentPoint;

    mouseMoved++;

    if (mouseMoved == 10) {
        mouseMoved = 0;
    }

}

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

    UITouch *touch = [touches anyObject];

    if ([touch tapCount] == 2) {
        drawImage.image = nil;
        return;
    }
    if(!mouseSwiped) {
        //if color == green
        UIGraphicsBeginImageContext(self.view.frame.size);
        [drawImage.image drawInRect:CGRectMake(0, 0, drawImage.frame.size.width, drawImage.frame.size.height)]; //originally self.frame.size.width, self.frame.size.height)];
        CGContextSetLineCap(UIGraphicsGetCurrentContext(), kCGLineCapRound); //kCGLineCapSquare, kCGLineCapButt, kCGLineCapRound
        CGContextSetLineWidth(UIGraphicsGetCurrentContext(), 10.0);
        CGContextSetRGBStrokeColor(UIGraphicsGetCurrentContext(), 0.0, 1.0, 0.0, 1.0);
        CGContextMoveToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
        CGContextAddLineToPoint(UIGraphicsGetCurrentContext(), lastPoint.x, lastPoint.y);
        CGContextStrokePath(UIGraphicsGetCurrentContext());
        CGContextFlush(UIGraphicsGetCurrentContext());
        drawImage.image = UIGraphicsGetImageFromCurrentImageContext();
        UIGraphicsEndImageContext();
    }
}

- (void)didReceiveMemoryWarning {
    // Releases the view if it doesn't have a superview.
    [super didReceiveMemoryWarning];

    // Release any cached data, images, etc that aren't in use.
}

- (void)viewDidUnload {
    [self setDrawImage:nil];
    [self setMy_view:nil];
    // Release any retained subviews of the main view.
    // e.g. self.myOutlet = nil;
}


- (void)dealloc {
    [my_view release];
    [drawImage release];
    [super dealloc];
}

This Code working perfectly on without fullScreen mode.else,does not working like Below output:

Please any one help me with us any code or examples...!

Thanks..!

解决方案

Move drawImage.frame = self.view.frame; from
- (void)viewDidLoad method
to
-(void)viewWillAppear:(BOOL)animated
Any geometry adjustments should be made in viewWillAppear or viewDidAppear.

这篇关于画线触摸事件在iPhone的全屏模式下无法完美运行的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！