iphone SDK：不能在图像数组中对角滚动？
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【中文标题】iphone SDK：不能在图像数组中对角滚动？【英文标题】：iphone SDK:Can't diagonal scrolling in a image array? 【发布时间】：2010-11-25 14:43:40 【问题描述】：我有一张大尺寸的图片。为了节省内存不想一次加载整张图片，所以我把图片分成9张像3X3数组一样
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我可以将较小的图像片段从一个图像滚动到相邻的图像，例如从 (1,1) 到 (1,2)(1,3)，或从 (1,1) 到 (2,1) (3,1)，但我无法将其从 (1,1) 滚动到 (2,2) 或 (3,3)。
似乎我只能左右或上下滚动图片，但不能对角滚动。
如果我沿对角线滚动，那么所有图像看起来都乱七八糟，像这样：
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如何在滚动时对角滚动和/或跳过部分？
这是我的代码：
.h
CGPoint first;
IBOutlet UIScrollView *scr;
NSMutableArray *ary;
int x_total;
int y_total;
BOOL move;
BOOL inside;
IBOutlet UIView *mapview;
int x_begin;
int y_begin;
int x_times;
int y_times;
剪切图像
move = NO;
inside = NO;
x_times = 0;
y_total = 0;
ary = [NSMutableArray new];
for (int i = 0; i < 3; i++)
for (int j = 0; j < 3; j++)
UIImageView *img = [[UIImageView alloc] initWithImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_%d_%d.jpg", i ,j]]];
[img setFrame:CGRectMake((i-1) *64, (j-1)*64, 64, 64)];
[mapview addSubview:img];
[ary addObject:img];
x_begin = 64*2;
y_begin = 64*2;
x_total = 0;
y_total = 0;
以及控制手指触摸和移动的方法
- (void)touchesBegan:(NSSet *)touches withEvent:(UIEvent *)event
NSLog(@"touchesBegan");
//Set Animation
[UIView beginAnimations:nil context:nil];
[UIView setAnimationDuration:1];
[UIView setAnimationBeginsFromCurrentState:YES];
//Trigger start
//UITouch *touch = [touches anyObject];
NSSet *teaches = [event allTouches];
for (UITouch *myTouch in teaches)
//first = [myTouch previousLocationInView:self.view];
CGPoint currentTouchPosition = [myTouch previousLocationInView:mapview];
//first = [myTouch previousLocationInView:mapview];
NSLog(@"currentTouchPosition x is %f",currentTouchPosition.x);
NSLog(@"currentTouchPosition y is %f",currentTouchPosition.y);
NSLog(@"mapview.frame.origin.x is %d",mapview.frame.origin.x);
NSLog(@"mapview.frame.origin.y is %d",mapview.frame.origin.y);
if ((currentTouchPosition.x > 0 && currentTouchPosition.x < 64) && (currentTouchPosition.y > 0 && currentTouchPosition.y < 64))
first = currentTouchPosition;
inside = YES;
else
first.x = 0;
first.y = 0;
inside = NO;
[UIView commitAnimations];
触摸移动
- (void)touchesMoved:(NSSet *)touches withEvent:(UIEvent *)event
//Touch Trigger
NSSet *teaches = [event allTouches];
for (UITouch *myTouch in teaches)
CGPoint currentTouchPosition = [myTouch previousLocationInView:mapview];
NSLog(@"currentTouchPosition.x is %d ",currentTouchPosition.x);
if (inside)
if ((currentTouchPosition.x > 0 && currentTouchPosition.x < 64) && (currentTouchPosition.y > 0 && currentTouchPosition.y < 64))
int x = first.x-currentTouchPosition.x;
int y = first.y-currentTouchPosition.y;
x_total += x;
y_total += y;
NSLog(@"x_total is %d",x_total);
NSLog(@"y_total is %d",y_total);
NSArray *arr = [mapview subviews];
NSEnumerator *enumerator = [arr objectEnumerator];
id anObject;
UIImageView *tmpimg;
while (anObject = [enumerator nextObject])
if([anObject isMemberOfClass:[UIImageView class]])
tmpimg = (UIImageView *)anObject;
if (x < 0)
[tmpimg setFrame:CGRectMake(tmpimg.frame.origin.x-x, tmpimg.frame.origin.y, tmpimg.frame.size.width, tmpimg.frame.size.height)];
else
[tmpimg setFrame:CGRectMake(tmpimg.frame.origin.x-x, tmpimg.frame.origin.y, tmpimg.frame.size.width, tmpimg.frame.size.height)];
if (y < 0)
[tmpimg setFrame:CGRectMake(tmpimg.frame.origin.x, tmpimg.frame.origin.y-y, tmpimg.frame.size.width, tmpimg.frame.size.height)];
else
[tmpimg setFrame:CGRectMake(tmpimg.frame.origin.x, tmpimg.frame.origin.y-y, tmpimg.frame.size.width, tmpimg.frame.size.height)];
if (y_times == 0)
if (y_total >= 64/2)
y_times ++;
for (int i = 0; i < 3; i++)
int g;
if (i == 0)
g = 0;
else if (i == 1)
g = 3;
else if (i == 2)
g = 6;
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:g];
[[ary objectAtIndex:g] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_%d_3.jpg" ,i]]];
[[ary objectAtIndex:g] setFrame:CGRectMake(tmpimg.frame.origin.x, tmpimg.frame.origin.y+(64+64*2), 64, 64)];
tmpimg = nil;
y_total= 0;
if (x_times == 0)
if (x_total >= 64/2)
x_times ++;
for (int i = 0; i < 3; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_3_%d.jpg" ,i]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x+(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_times == 1)
if (x_total >= 64)
x_times ++;
for (int i = 3; i < 6; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_4_%d.jpg" ,i-3]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x+(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_total <= -64/2)
x_times --;
for (int i = 0; i < 3; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_0_%d.jpg" ,i]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x-(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_times == 2)
if (x_total >= 64)
x_times ++;
for (int i = 6; i < 9; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_5_%d.jpg" ,i-6]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x+(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_total <= -64/2)
x_times --;
for (int i = 3; i < 6; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_1_%d.jpg" ,i-3]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x-(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_times == 3)
if (x_total <= -64/2)
x_times --;
for (int i = 6; i < 9; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_2_%d.jpg" ,i-6]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x-(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
if (y_times == 1)
if (y_total <= -64/2)
y_times --;
for (int i = 0; i < 3; i++)
int g;
if (i == 0)
g = 0;
else if (i == 1)
g = 3;
else if (i == 2)
g = 6;
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:g];
[[ary objectAtIndex:g] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_%d_0.jpg" ,i]]];
[[ary objectAtIndex:g] setFrame:CGRectMake(tmpimg.frame.origin.x, tmpimg.frame.origin.y-(64+64*2), 64, 64)];
tmpimg = nil;
y_total= 0;
if (x_times == 0)
if (x_total >= 64/2)
x_times ++;
for (int i = 0; i < 3; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
if (i == 0)
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_3_%d.jpg" ,i+3]]];
else
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_3_%d.jpg" ,i]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x+(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_times == 1)
if (x_total >= 64)
x_times ++;
for (int i = 3; i < 6; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
if (i == 3)
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_4_%d.jpg" ,i]]];
else
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_4_%d.jpg" ,i-3]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x+(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_total <= -64/2)
x_times --;
for (int i = 0; i < 3; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
if (i == 0)
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_0_%d.jpg" ,i+3]]];
else
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_0_%d.jpg" ,i]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x-(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_times == 2)
if (x_total >= 64)
x_times ++;
for (int i = 6; i < 9; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
if (i == 3)
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_5_%d.jpg" ,i-3]]];
else
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_5_%d.jpg" ,i-6]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x+(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_total <= -64/2)
x_times --;
for (int i = 3; i < 6; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
if (i == 3)
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_1_%d.jpg" ,i]]];
else
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_1_%d.jpg" ,i-3]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x-(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
else if (x_times == 3)
if (x_total <= -64/2)
x_times --;
for (int i = 6; i < 9; i++)
UIImageView *tmpimg;
tmpimg = [ary objectAtIndex:i];
if (i == 3)
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_2_%d.jpg" ,i-3]]];
else
[[ary objectAtIndex:i] setImage:[UIImage imageNamed:[NSString stringWithFormat:@"map14_2_%d.jpg" ,i-6]]];
[[ary objectAtIndex:i] setFrame:CGRectMake(tmpimg.frame.origin.x-(64+64*2), tmpimg.frame.origin.y, 64, 64)];
tmpimg = nil;
x_total= 0;
first.x = currentTouchPosition.x;
first.y = currentTouchPosition.y;
arr=nil;
else
first.x = 0;
first.y = 0;
inside = NO;
else
if ((currentTouchPosition.x > 0 && currentTouchPosition.x < 64) && (currentTouchPosition.y > 0 && currentTouchPosition.y < 64))
first = currentTouchPosition;
inside = YES;
else
first.x = 0;
first.y = 0;
inside = NO;
【问题讨论】：
手指移动有点长.... 原始图像有多大？另外，您使用的是 UIScrollView 吗？ 原图为1280*1024，不使用UIScrollView tl;博士。我认为如果您能进一步缩小问题范围，这对我们会有所帮助；阅读大量代码对帮助您来说有点困难。 1280x1024 将毫无问题地加载到内存中，为什么你需要让你的生活更艰难:)？ 【参考方案1】：这听起来有点像你在尝试重新发明***。
你看过 UIScrollView 吗？
特别是，有一个示例代码（我相信是 ImageSuite），它专门展示了如何将较大的图像分割成图块，然后仅根据需要将它们定位在允许向任何方向滚动的滚动视图中。
这就是例如 MKMapView (Maps.app) 的工作原理。
【讨论】：
我不确定，我会告诉我的朋友~谢谢朋友！以上是关于iphone SDK：不能在图像数组中对角滚动？的主要内容，如果未能解决你的问题，请参考以下文章
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