碧玉妆成一树高，万条垂下绿丝绦。
不知细叶谁裁出，二月春风似剪刀
前言
岁月无情，转眼间年已过完，本打算在年前写一篇视频编辑处理方面的文章，奈何时间...旧事未完，新事又来，在最近的项目中，需要实现如下图中的效果
xiaoguo.png
由于时间紧迫，本打算找个现成的..居然没找到，好吧！那就自己动手，丰衣足食吧。
思路
由于服务器只返回图片或者人员名字，所以想全部通过图片来拼接的方式不可行，为了性能，就采取了Quartz 2D中CGContextRef的方式来进行绘制。最开始我的思路是先绘制一个大圆圈，然后再绘制几条白色的线条，来实现目标，但是问题来了，就是文字的背景颜色，于是放弃该方案，最终选择通过返回的数据的个数来绘制不同的弧面（最多4个），在绘制弧面的时候，让弧度之间的空白处作为白色线条。
first
在思路确定好后，就准备开始动手进行敲键盘了，为了先试试效果，先写了一个纯文字来绘制图片的API，如下
+ (UIImage *)gl_creatImageWithString:(NSAttributedString *)string imageSize:(CGSize)imageSize imageColor:(UIColor *)imageColor
{
//通过自己创建一个context来绘制，通常用于对图片的处理
UIGraphicsBeginImageContextWithOptions(imageSize, NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
//设置填充颜色
CGContextSetFillColorWithColor(context, imageColor.CGColor);
//直接按rect的范围覆盖
CGContextAddEllipseInRect(context, CGRectMake(0, 0, imageSize.width, imageSize.height));
CGContextFillPath(context);
CGSize stringSize = [string size];
CGFloat x = (imageSize.width - stringSize.width)/2.0;
CGFloat y = (imageSize.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
}
来，看看效果
wenzi.jpeg
恩！感觉不错，心里一阵窃喜！这里入参为
NSAttributedString变量类型，方便自己设置大小颜色等效果
second
绘制圆形图片，这个在之前的文章中已经实现该功能，所以就节省了步骤，代码如下
+ (UIImage *)gl_circleImage:(UIImage *)image
{
UIGraphicsBeginImageContextWithOptions(CGSizeMake(image.size.width, image.size.height), NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
CGRect rect = CGRectMake(0, 0, image.size.width, image.size.height);
//画椭圆 当宽和高一样的时候 为圆
CGContextAddEllipseInRect(context, rect);
//剪切可视范围
CGContextClip(context);
//绘制图片
[image drawInRect:rect];
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
}
怀抱激动的心情，于是写下了如下代码
//通过自己创建一个context来绘制，通常用于对图片的处理
UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat radius = size.width/2.0 - 1;
CGPoint center = CGPointMake(size.width/2.0 - 1, size.height/2.0);
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:M_PI_2 endAngle:M_PI + M_PI_2 clockwise:YES];
[path addLineToPoint:center];
CGPoint center_n = CGPointMake(size.width/2.0 + 1, size.height/2.0);
UIBezierPath *path_n = [UIBezierPath bezierPathWithArcCenter:center_n radius:radius startAngle:M_PI + M_PI_2 endAngle:2 * M_PI + M_PI_2 clockwise:YES];
[path_n addLineToPoint:center_n];
CGContextAddPath(context, path_n.CGPath);
CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
CGContextAddPath(context, path.CGPath);
CGContextFillPath(context);
NSAttributedString *string = (NSAttributedString*)contents[0];
CGSize stringSize = [string size];
CGFloat x = (path.bounds.size.width - stringSize.width)/2.0;
CGFloat y = (path.bounds.size.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
CGContextClip(context);
if ([contents[1] isKindOfClass:[UIImage class]]) {
UIImage *img = (UIImage *)contents[1];
[img drawInRect:path_n.bounds];
}
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
然而在运行的那一刻，瞬间泪崩
Simulator Screen Shot - iPhone X - 2018-03-12 at 16.39.34.png
什么鬼，不是说好的半圆么....这个问题让我真是苦恼，仔细检查代码，发现没啥问题呀，路径也是半圆的路径，正在一筹莫展的时候，突然在网上看到一个问题
CGContextStrokePath, CGContextFillPath, CGContextEOFillPath, CGContext- DrawPath. 描边或者填充操作都会清除这个路径，清除路径，也就是说当我执行CGContextClip的时候，路径已经不在了，所以我想要的半圆也就没了。看到这，我立刻改了下代码，如下
//通过自己创建一个context来绘制，通常用于对图片的处理
UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat radius = size.width/2.0 - 1;
CGPoint center = CGPointMake(size.width/2.0 - 1, size.height/2.0);
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:M_PI_2 endAngle:M_PI + M_PI_2 clockwise:YES];
[path addLineToPoint:center];
CGPoint center_n = CGPointMake(size.width/2.0 + 1, size.height/2.0);
UIBezierPath *path_n = [UIBezierPath bezierPathWithArcCenter:center_n radius:radius startAngle:M_PI + M_PI_2 endAngle:2 * M_PI + M_PI_2 clockwise:YES];
[path_n addLineToPoint:center_n];
CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
CGContextAddPath(context, path.CGPath);
CGContextFillPath(context);
NSAttributedString *string = (NSAttributedString*)contents[0];
CGSize stringSize = [string size];
CGFloat x = (path.bounds.size.width - stringSize.width)/2.0;
CGFloat y = (path.bounds.size.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
CGContextAddPath(context, path_n.CGPath);
CGContextClip(context);
if ([contents[1] isKindOfClass:[UIImage class]]) {
UIImage *img = (UIImage *)contents[1];
[img drawInRect:path_n.bounds];
}
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
将CGContextAddPath(context, path_n.CGPath);添加半圆的路径移动到CGContextFillPath(context);后面CGContextClip(context);前面，再一执行，瞬间效果就对了
Simulator Screen Shot - iPhone X - 2018-03-12 at 16.39.54.png
last
在上面的问题都解决好之后，剩余的问题就都不是问题了，就是一些简单逻辑和坐标的计算，代码如下
+ (UIImage *)gl_groupHeadPortraitWithContents:(NSArray *)contents size:(CGSize)size
{
NSAssert(contents.count <=4 && contents.count >0, @"contents can not be empty array");
switch (contents.count) {
case 1:
{
if ([contents[0] isKindOfClass:[UIImage class]]) {
return [self gl_circleImage:(UIImage *)contents[0]];
}else if ([contents[0] isKindOfClass:[NSAttributedString class]]){
return [self gl_creatImageWithString:contents[0] imageSize:size imageColor:[UIColor grayColor]];
}
}
break;
case 2:
{
//通过自己创建一个context来绘制，通常用于对图片的处理
UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat radius = size.width/2.0 - 1;
CGPoint center = CGPointMake(size.width/2.0 - 1, size.height/2.0);
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:M_PI_2 endAngle:M_PI + M_PI_2 clockwise:YES];
[path addLineToPoint:center];
CGPoint center_n = CGPointMake(size.width/2.0 + 1, size.height/2.0);
UIBezierPath *path_n = [UIBezierPath bezierPathWithArcCenter:center_n radius:radius startAngle:M_PI + M_PI_2 endAngle:2 * M_PI + M_PI_2 clockwise:YES];
[path_n addLineToPoint:center_n];
if ([contents[0] isKindOfClass:[UIImage class]]) {
CGContextAddPath(context, path.CGPath);
}else{
CGContextSetFillColorWithColor(context, [UIColor redColor].CGColor);
CGContextAddPath(context, path.CGPath);
CGContextFillPath(context);
NSAttributedString *string = (NSAttributedString*)contents[0];
CGSize stringSize = [string size];
CGFloat x = (path.bounds.size.width - stringSize.width)/2.0;
CGFloat y = (path.bounds.size.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
}
if ([contents[1] isKindOfClass:[UIImage class]]) {
CGContextAddPath(context, path_n.CGPath);
}else{
CGContextSetFillColorWithColor(context, [UIColor orangeColor].CGColor);
CGContextAddPath(context, path_n.CGPath);
CGContextFillPath(context);
NSAttributedString *string = (NSAttributedString*)contents[1];
CGSize stringSize = [string size];
CGFloat x = path_n.currentPoint.x + (path_n.bounds.size.width - stringSize.width)/2.0;
CGFloat y = (path_n.bounds.size.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
//图片在前的时候 文字在后 路径被清了 导致后面的clip剪切不了路径
CGContextAddPath(context, path.CGPath);
}
CGContextClip(context);
if ([contents[0] isKindOfClass:[UIImage class]]) {
UIImage *img = (UIImage *)contents[0];
[img drawInRect:path.bounds];
}
if ([contents[1] isKindOfClass:[UIImage class]]) {
UIImage *img = (UIImage *)contents[1];
[img drawInRect:path_n.bounds];
}
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
}
break;
case 3:
{
//通过自己创建一个context来绘制，通常用于对图片的处理
UIGraphicsBeginImageContextWithOptions(size, NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
//先确定三个路径
CGFloat radius = size.width/2.0 - 1;
CGPoint center = CGPointMake(size.width/2.0 - 1, size.height/2.0);
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:M_PI_2 endAngle:M_PI + M_PI_2 clockwise:YES];
[path addLineToPoint:center];
CGPoint center_s = CGPointMake(size.width/2.0 + 1, size.height/2.0 - 1);
UIBezierPath *path_s = [UIBezierPath bezierPathWithArcCenter:center_s radius:radius-1 startAngle:M_PI + M_PI_2 endAngle:2 * M_PI clockwise:YES];
[path_s addLineToPoint:center_s];
CGPoint center_t = CGPointMake(size.width/2.0 + 1, size.height/2.0 + 1);
UIBezierPath *path_t = [UIBezierPath bezierPathWithArcCenter:center_t radius:radius-1 startAngle:2 * M_PI endAngle:2 * M_PI + M_PI_2 clockwise:YES];
[path_t addLineToPoint:center_t];
NSMutableArray *imageArray = [[NSMutableArray alloc] init];
NSMutableArray *titleArray = [[NSMutableArray alloc] init];
for (id object in contents) {
if ([object isKindOfClass:[UIImage class]]) {
[imageArray addObject:object];
}else{
[titleArray addObject:object];
}
}
if (imageArray.count == 3) {
//全部为图片
CGContextAddPath(context, path.CGPath);
CGContextAddPath(context, path_s.CGPath);
CGContextAddPath(context, path_t.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
UIImage *img1 = (UIImage *)imageArray[1];
UIImage *img2 = (UIImage *)imageArray[2];
[img0 drawInRect:path.bounds];
[img1 drawInRect:path_s.bounds];
[img2 drawInRect:path_t.bounds];
}else if (imageArray.count == 2){
//文字1
CGContextSetFillColorWithColor(context, [UIColor orangeColor].CGColor);
CGContextAddPath(context, path_t.CGPath);
CGContextFillPath(context);
NSAttributedString *string = (NSAttributedString*)titleArray[0];
CGSize stringSize = [string size];
CGFloat x = path_t.currentPoint.x + (path_t.bounds.size.width - stringSize.width)/2.0;
CGFloat y = path_t.currentPoint.y + (path_t.bounds.size.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
//图片1 图片2
CGContextAddPath(context, path.CGPath);
CGContextAddPath(context, path_s.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
UIImage *img1 = (UIImage *)imageArray[1];
[img0 drawInRect:path.bounds];
[img1 drawInRect:path_s.bounds];
}else if (imageArray.count == 1){
//文字1
CGContextSetFillColorWithColor(context, [UIColor orangeColor].CGColor);
CGContextAddPath(context, path_t.CGPath);
CGContextFillPath(context);
NSAttributedString *string = (NSAttributedString*)titleArray[0];
CGSize stringSize = [string size];
CGFloat x = path_t.currentPoint.x + (path_t.bounds.size.width - stringSize.width)/2.0;
CGFloat y = path_t.currentPoint.y + (path_t.bounds.size.height - stringSize.height)/2.0;
[string drawInRect:CGRectMake(x, y, stringSize.width, stringSize.height)];
//文字2
CGContextSetFillColorWithColor(context, [UIColor purpleColor].CGColor);
CGContextAddPath(context, path_s.CGPath);
CGContextFillPath(context);
NSAttributedString *string_s = (NSAttributedString*)titleArray[1];
CGSize stringSize_s = [string_s size];
CGFloat x_s = path_s.currentPoint.x + (path_s.bounds.size.width - stringSize_s.width)/2.0;
CGFloat y_s = (path_s.bounds.size.height - stringSize_s.height)/2.0;
[string_s drawInRect:CGRectMake(x_s, y_s, stringSize_s.width, stringSize_s.height)];
//图片
CGContextAddPath(context, path.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
[img0 drawInRect:path.bounds];
}else{
for (int i = 0; i < titleArray.count; i ++) {
UIColor *color;
UIBezierPath *drawPath;
NSAttributedString *string_s = (NSAttributedString*)titleArray[i];
CGSize stringSize_s = [string_s size];
CGFloat x_s = 0;
CGFloat y_s = 0;
if (i == 0) {
color = [UIColor greenColor];
drawPath = path;
x_s = (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else if(i == 1){
color = [UIColor purpleColor];
drawPath = path_s;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else{
color = [UIColor redColor];
drawPath = path_t;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextAddPath(context, drawPath.CGPath);
CGContextFillPath(context);
[string_s drawInRect:CGRectMake(x_s, y_s, stringSize_s.width, stringSize_s.height)];
}
}
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
}
break;
case 4:
{
CGSize imageSize = size;
//通过自己创建一个context来绘制，通常用于对图片的处理
UIGraphicsBeginImageContextWithOptions(imageSize, NO, [UIScreen mainScreen].scale);
//获取上下文
CGContextRef context = UIGraphicsGetCurrentContext();
CGFloat radius = size.width/2.0 - 1;
CGPoint center = CGPointMake(imageSize.width/2.0 + 1, imageSize.height/2.0 + 1);
//路径
UIBezierPath *path = [UIBezierPath bezierPathWithArcCenter:CGPointMake(imageSize.width/2.0 - 1, imageSize.height/2.0 - 1) radius:radius startAngle:M_PI endAngle:M_PI + M_PI_2 clockwise:YES];
[path addLineToPoint:CGPointMake(imageSize.width/2.0 - 1, imageSize.height/2.0 - 1)];
//路径1
UIBezierPath *path1 = [UIBezierPath bezierPathWithArcCenter:CGPointMake(imageSize.width/2.0 + 1, imageSize.height/2.0 - 1) radius:radius startAngle:M_PI + M_PI_2 endAngle:2*M_PI clockwise:YES];
[path1 addLineToPoint:CGPointMake(imageSize.width/2.0 + 1, imageSize.height/2.0 - 1)];
//路径2
UIBezierPath *path2 = [UIBezierPath bezierPathWithArcCenter:center radius:radius startAngle:0 endAngle:M_PI_2 clockwise:YES];
[path2 addLineToPoint:center];
//路径3
UIBezierPath *path3 = [UIBezierPath bezierPathWithArcCenter:CGPointMake(center.x-2, center.y) radius:radius startAngle:M_PI_2 endAngle:M_PI clockwise:YES];
[path3 addLineToPoint:CGPointMake(center.x-2, center.y)];
NSMutableArray *imageArray = [[NSMutableArray alloc] init];
NSMutableArray *titleArray = [[NSMutableArray alloc] init];
for (id object in contents) {
if ([object isKindOfClass:[UIImage class]]) {
[imageArray addObject:object];
}else{
[titleArray addObject:object];
}
}
if (imageArray.count == 4) {
//图片
CGContextAddPath(context, path.CGPath);
CGContextAddPath(context, path1.CGPath);
CGContextAddPath(context, path2.CGPath);
CGContextAddPath(context, path3.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
UIImage *img1 = (UIImage *)imageArray[1];
UIImage *img2 = (UIImage *)imageArray[2];
UIImage *img3 = (UIImage *)imageArray[3];
[img0 drawInRect:path.bounds];
[img1 drawInRect:path1.bounds];
[img2 drawInRect:path2.bounds];
[img3 drawInRect:path3.bounds];
}else if (imageArray.count == 3){
for (int i = 0; i < titleArray.count; i ++) {
UIColor *color;
UIBezierPath *drawPath;
NSAttributedString *string_s = (NSAttributedString*)titleArray[i];
CGSize stringSize_s = [string_s size];
CGFloat x_s = 0;
CGFloat y_s = 0;
if (i == 0) {
color = [UIColor redColor];
drawPath = path3;
x_s = (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextAddPath(context, drawPath.CGPath);
CGContextFillPath(context);
[string_s drawInRect:CGRectMake(x_s, y_s, stringSize_s.width, stringSize_s.height)];
}
CGContextAddPath(context, path.CGPath);
CGContextAddPath(context, path1.CGPath);
CGContextAddPath(context, path2.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
UIImage *img1 = (UIImage *)imageArray[1];
UIImage *img2 = (UIImage *)imageArray[2];
[img0 drawInRect:path.bounds];
[img1 drawInRect:path1.bounds];
[img2 drawInRect:path2.bounds];
}else if (imageArray.count == 2){
for (int i = 0; i < titleArray.count; i ++) {
UIColor *color;
UIBezierPath *drawPath;
NSAttributedString *string_s = (NSAttributedString*)titleArray[i];
CGSize stringSize_s = [string_s size];
CGFloat x_s = 0;
CGFloat y_s = 0;
if(i == 1){
color = [UIColor purpleColor];
drawPath = path2;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else{
color = [UIColor redColor];
drawPath = path3;
x_s = (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextAddPath(context, drawPath.CGPath);
CGContextFillPath(context);
[string_s drawInRect:CGRectMake(x_s, y_s, stringSize_s.width, stringSize_s.height)];
}
CGContextAddPath(context, path.CGPath);
CGContextAddPath(context, path1.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
UIImage *img1 = (UIImage *)imageArray[1];
[img0 drawInRect:path.bounds];
[img1 drawInRect:path1.bounds];
}else if (imageArray.count == 1){
for (int i = 0; i < titleArray.count; i ++) {
UIColor *color;
UIBezierPath *drawPath;
NSAttributedString *string_s = (NSAttributedString*)titleArray[i];
CGSize stringSize_s = [string_s size];
CGFloat x_s = 0;
CGFloat y_s = 0;
if(i == 0){
color = [UIColor orangeColor];
drawPath = path1;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else if(i == 1){
color = [UIColor purpleColor];
drawPath = path2;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else{
color = [UIColor redColor];
drawPath = path3;
x_s = (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextAddPath(context, drawPath.CGPath);
CGContextFillPath(context);
[string_s drawInRect:CGRectMake(x_s, y_s, stringSize_s.width, stringSize_s.height)];
}
CGContextAddPath(context, path.CGPath);
CGContextClip(context);
UIImage *img0 = (UIImage *)imageArray[0];
[img0 drawInRect:path.bounds];
}else{
for (int i = 0; i < titleArray.count; i ++) {
UIColor *color;
UIBezierPath *drawPath;
NSAttributedString *string_s = (NSAttributedString*)titleArray[i];
CGSize stringSize_s = [string_s size];
CGFloat x_s = 0;
CGFloat y_s = 0;
if (i == 0) {
color = [UIColor greenColor];
drawPath = path;
x_s = (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else if(i == 1){
color = [UIColor orangeColor];
drawPath = path1;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else if(i == 2){
color = [UIColor purpleColor];
drawPath = path2;
x_s = drawPath.currentPoint.x + (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}else{
color = [UIColor redColor];
drawPath = path3;
x_s = (drawPath.bounds.size.width - stringSize_s.width)/2.0;
y_s = drawPath.currentPoint.y + (drawPath.bounds.size.height - stringSize_s.height)/2.0;
}
CGContextSetFillColorWithColor(context, color.CGColor);
CGContextAddPath(context, drawPath.CGPath);
CGContextFillPath(context);
[string_s drawInRect:CGRectMake(x_s, y_s, stringSize_s.width, stringSize_s.height)];
}
}
UIImage *newimg = UIGraphicsGetImageFromCurrentImageContext();
UIGraphicsEndImageContext();
return newimg;
}
break;
default:
break;
}
return nil;
}
由于时间关系，代码比较长，中间文字的绘制的坐标稍微有点偏，算的上是我目前为止封装的比较长的API了，各位看官得耐心了，多多包涵~
下面还是看看效果图
four.png
three
最后还是来个传送门
