如何自定义分组表视图/边框颜色的背景您需要设置UITableViewCell的backgroundView属性自定义UIView,吸引了在适当的边界和背景颜色的本身。 这种观点必须能够吸纳4种不同的模式the边界,圆形至于有关第一次在一节细胞顶部,为在最后一节细胞bottom,因为在对一节middle cells no圆角圆角落,并四舍五入为第一个细胞都含有4个角落。
不幸的是我无法弄清楚如何使这种模式下自动设置,所以我不得不设在UITableViewDataSource的- cellForRowAtIndexPath它的方法。
这是一个真正的太平洋岛屿电信协会,但我已经与苹果公司的工程师证实,这是目前唯一的办法。
更新下面是自定义视图代码为保函。 有一个绘图错误,使圆角看起来有点滑稽,但我们转移到一个不同的设计和取消了自定义的背景前,我有机会来解决它。 不过这可能会很对你有帮助:
//
// CustomCellBackgroundView.h
//
// Created by Mike Akers on 11/21/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import <UIKit/UIKit.h>
typedef enum {
CustomCellBackgroundViewPositionTop,
CustomCellBackgroundViewPositionMiddle,
CustomCellBackgroundViewPositionBottom,
CustomCellBackgroundViewPositionSingle
} CustomCellBackgroundViewPosition;
@interface CustomCellBackgroundView : UIView {
UIColor *borderColor;
UIColor *fillColor;
CustomCellBackgroundViewPosition position;
}
@property(nonatomic, retain) UIColor *borderColor, *fillColor;
@property(nonatomic) CustomCellBackgroundViewPosition position;
@end
//
// CustomCellBackgroundView.m
//
// Created by Mike Akers on 11/21/08.
// Copyright 2008 __MyCompanyName__. All rights reserved.
//
#import "CustomCellBackgroundView.h"
static void addRoundedRectToPath(CGContextRef context, CGRect rect,
float ovalWidth,float ovalHeight);
@implementation CustomCellBackgroundView
@synthesize borderColor, fillColor, position;
- (BOOL) isOpaque {
return NO;
}
- (id)initWithFrame:(CGRect)frame {
if (self = [super initWithFrame:frame]) {
// Initialization code
}
return self;
}
- (void)drawRect:(CGRect)rect {
// Drawing code
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(c, [fillColor CGColor]);
CGContextSetStrokeColorWithColor(c, [borderColor CGColor]);
if (position == CustomCellBackgroundViewPositionTop) {
CGContextFillRect(c, CGRectMake(0.0f, rect.size.height - 10.0f, rect.size.width, 10.0f));
CGContextBeginPath(c);
CGContextMoveToPoint(c, 0.0f, rect.size.height - 10.0f);
CGContextAddLineToPoint(c, 0.0f, rect.size.height);
CGContextAddLineToPoint(c, rect.size.width, rect.size.height);
CGContextAddLineToPoint(c, rect.size.width, rect.size.height - 10.0f);
CGContextStrokePath(c);
CGContextClipToRect(c, CGRectMake(0.0f, 0.0f, rect.size.width, rect.size.height - 10.0f));
} else if (position == CustomCellBackgroundViewPositionBottom) {
CGContextFillRect(c, CGRectMake(0.0f, 0.0f, rect.size.width, 10.0f));
CGContextBeginPath(c);
CGContextMoveToPoint(c, 0.0f, 10.0f);
CGContextAddLineToPoint(c, 0.0f, 0.0f);
CGContextStrokePath(c);
CGContextBeginPath(c);
CGContextMoveToPoint(c, rect.size.width, 0.0f);
CGContextAddLineToPoint(c, rect.size.width, 10.0f);
CGContextStrokePath(c);
CGContextClipToRect(c, CGRectMake(0.0f, 10.0f, rect.size.width, rect.size.height));
} else if (position == CustomCellBackgroundViewPositionMiddle) {
CGContextFillRect(c, rect);
CGContextBeginPath(c);
CGContextMoveToPoint(c, 0.0f, 0.0f);
CGContextAddLineToPoint(c, 0.0f, rect.size.height);
CGContextAddLineToPoint(c, rect.size.width, rect.size.height);
CGContextAddLineToPoint(c, rect.size.width, 0.0f);
CGContextStrokePath(c);
return; // no need to bother drawing rounded corners, so we return
}
// At this point the clip rect is set to only draw the appropriate
// corners, so we fill and stroke a rounded rect taking the entire rect
CGContextBeginPath(c);
addRoundedRectToPath(c, rect, 10.0f, 10.0f);
CGContextFillPath(c);
CGContextSetLineWidth(c, 1);
CGContextBeginPath(c);
addRoundedRectToPath(c, rect, 10.0f, 10.0f);
CGContextStrokePath(c);
}
- (void)dealloc {
[borderColor release];
[fillColor release];
[super dealloc];
}
@end
static void addRoundedRectToPath(CGContextRef context, CGRect rect,
float ovalWidth,float ovalHeight)
{
float fw, fh;
if (ovalWidth == 0 || ovalHeight == 0) {// 1
CGContextAddRect(context, rect);
return;
}
CGContextSaveGState(context);// 2
CGContextTranslateCTM (context, CGRectGetMinX(rect),// 3
CGRectGetMinY(rect));
CGContextScaleCTM (context, ovalWidth, ovalHeight);// 4
fw = CGRectGetWidth (rect) / ovalWidth;// 5
fh = CGRectGetHeight (rect) / ovalHeight;// 6
CGContextMoveToPoint(context, fw, fh/2); // 7
CGContextAddArcToPoint(context, fw, fh, fw/2, fh, 1);// 8
CGContextAddArcToPoint(context, 0, fh, 0, fh/2, 1);// 9
CGContextAddArcToPoint(context, 0, 0, fw/2, 0, 1);// 10
CGContextAddArcToPoint(context, fw, 0, fw, fh/2, 1); // 11
CGContextClosePath(context);// 12
CGContextRestoreGState(context);// 13
}
首先感谢所有为这个代码。 我已经在这个函数绘图改变,以消除一些角落绘制问题。
-(void)drawRect:(CGRect)rect
{
// Drawing code
CGContextRef c = UIGraphicsGetCurrentContext();
CGContextSetFillColorWithColor(c, [fillColor CGColor]);
CGContextSetStrokeColorWithColor(c, [borderColor CGColor]);
CGContextSetLineWidth(c, 2);
if (position == CustomCellBackgroundViewPositionTop) {
CGFloat minx = CGRectGetMinX(rect) , midx = CGRectGetMidX(rect), maxx = CGRectGetMaxX(rect) ;
CGFloat miny = CGRectGetMinY(rect) , maxy = CGRectGetMaxY(rect) ;
minx = minx + 1;
miny = miny + 1;
maxx = maxx - 1;
maxy = maxy ;
CGContextMoveToPoint(c, minx, maxy);
CGContextAddArcToPoint(c, minx, miny, midx, miny, ROUND_SIZE);
CGContextAddArcToPoint(c, maxx, miny, maxx, maxy, ROUND_SIZE);
CGContextAddLineToPoint(c, maxx, maxy);
// Close the path
CGContextClosePath(c);
// Fill & stroke the path
CGContextDrawPath(c, kCGPathFillStroke);
return;
} else if (position == CustomCellBackgroundViewPositionBottom) {
CGFloat minx = CGRectGetMinX(rect) , midx = CGRectGetMidX(rect), maxx = CGRectGetMaxX(rect) ;
CGFloat miny = CGRectGetMinY(rect) , maxy = CGRectGetMaxY(rect) ;
minx = minx + 1;
miny = miny ;
maxx = maxx - 1;
maxy = maxy - 1;
CGContextMoveToPoint(c, minx, miny);
CGContextAddArcToPoint(c, minx, maxy, midx, maxy, ROUND_SIZE);
CGContextAddArcToPoint(c, maxx, maxy, maxx, miny, ROUND_SIZE);
CGContextAddLineToPoint(c, maxx, miny);
// Close the path
CGContextClosePath(c);
// Fill & stroke the path
CGContextDrawPath(c, kCGPathFillStroke);
return;
} else if (position == CustomCellBackgroundViewPositionMiddle) {
CGFloat minx = CGRectGetMinX(rect) , maxx = CGRectGetMaxX(rect) ;
CGFloat miny = CGRectGetMinY(rect) , maxy = CGRectGetMaxY(rect) ;
minx = minx + 1;
miny = miny ;
maxx = maxx - 1;
maxy = maxy ;
CGContextMoveToPoint(c, minx, miny);
CGContextAddLineToPoint(c, maxx, miny);
CGContextAddLineToPoint(c, maxx, maxy);
CGContextAddLineToPoint(c, minx, maxy);
CGContextClosePath(c);
// Fill & stroke the path
CGContextDrawPath(c, kCGPathFillStroke);
return;
}
}
Iphone 图片
猜你喜欢
转载自20120923lina.iteye.com/blog/1697448
今日推荐
周排行