iOS 自定义控件 progressView(环形进度条)

转帖：http://blog.csdn.net/xiangzhang321/article/details/42688133

之前做项目的时候有用到环形进度条，先是在网上找了一下第三方控件，发现好用是好用，就是东西太多了，有点复杂，还不如自己写一个简单点适合自己用的。

先把自定义控件的效果图贴出来。





其实我写的这个控件很简单。索性就直接把源码贴出来吧。

.h文件的内容就是一些声明

#import <UIKit/UIKit.h>

@interface ProgressView : UIView

//中心颜色

@property (strong, nonatomic)UIColor *centerColor;

//圆环背景色

@property (strong, nonatomic)UIColor *arcBackColor;

//圆环色

@property (strong, nonatomic)UIColor *arcFinishColor;

@property (strong, nonatomic)UIColor *arcUnfinishColor;

//百分比数值（0-1）

@property (assign, nonatomic)float percent;

//圆环宽度

@property (assign, nonatomic)float width;

@end

.m文件里就是具体实现了

#import "ProgressView.h"

@implementation ProgressView

- (id)initWithFrame:(CGRect)frame{

self = [super initWithFrame:frame];

if (self) {

self.backgroundColor = ClearColor;

_percent = 0;

_width = 0;

}

return self;

}

- (void)setPercent:(float)percent{

_percent = percent;

[self setNeedsDisplay];

}

- (void)drawRect:(CGRect)rect{

[self addArcBackColor];

[self drawArc];

[self addCenterBack];

[self addCenterLabel];

}

- (void)addArcBackColor{

CGColorRef color = (_arcBackColor == nil) ? [UIColorlightGrayColor].CGColor : _arcBackColor.CGColor;

CGContextRef contextRef = UIGraphicsGetCurrentContext();

CGSize viewSize = self.bounds.size;

CGPoint center = CGPointMake(viewSize.width / 2, viewSize.height / 2);

// Draw the slices.

CGFloat radius = viewSize.width / 2;

CGContextBeginPath(contextRef);

CGContextMoveToPoint(contextRef, center.x, center.y);

CGContextAddArc(contextRef, center.x, center.y, radius,0,2*M_PI, 0);

CGContextSetFillColorWithColor(contextRef, color);

CGContextFillPath(contextRef);

}

- (void)drawArc{

if (_percent == 0 || _percent > 1) {

return;

}

if (_percent == 1) {

CGColorRef color = (_arcFinishColor == nil) ? [UIColorgreenColor].CGColor : _arcFinishColor.CGColor;

CGContextRef contextRef = UIGraphicsGetCurrentContext();

CGSize viewSize = self.bounds.size;

CGPoint center = CGPointMake(viewSize.width / 2, viewSize.height / 2);

// Draw the slices.

CGFloat radius = viewSize.width / 2;

CGContextBeginPath(contextRef);

CGContextMoveToPoint(contextRef, center.x, center.y);

CGContextAddArc(contextRef, center.x, center.y, radius,0,2*M_PI, 0);

CGContextSetFillColorWithColor(contextRef, color);

CGContextFillPath(contextRef);

}else{

float endAngle = 2*M_PI*_percent;

CGColorRef color = (_arcUnfinishColor == nil) ? [UIColorblueColor].CGColor : _arcUnfinishColor.CGColor;

CGContextRef contextRef = UIGraphicsGetCurrentContext();

CGSize viewSize = self.bounds.size;

CGPoint center = CGPointMake(viewSize.width / 2, viewSize.height / 2);

// Draw the slices.

CGFloat radius = viewSize.width / 2;

CGContextBeginPath(contextRef);

CGContextMoveToPoint(contextRef, center.x, center.y);

CGContextAddArc(contextRef, center.x, center.y, radius,0,endAngle, 0);

CGContextSetFillColorWithColor(contextRef, color);

CGContextFillPath(contextRef);

}

}

-(void)addCenterBack{

float width = (_width == 0) ? 5 : _width;

CGColorRef color = (_centerColor == nil) ? [UIColorwhiteColor].CGColor : _centerColor.CGColor;

CGContextRef contextRef = UIGraphicsGetCurrentContext();

CGSize viewSize = self.bounds.size;

CGPoint center = CGPointMake(viewSize.width / 2, viewSize.height / 2);

// Draw the slices.

CGFloat radius = viewSize.width / 2 - width;

CGContextBeginPath(contextRef);

CGContextMoveToPoint(contextRef, center.x, center.y);

CGContextAddArc(contextRef, center.x, center.y, radius,0,2*M_PI, 0);

CGContextSetFillColorWithColor(contextRef, color);

CGContextFillPath(contextRef);

}

- (void)addCenterLabel{

NSString *percent = @"";

float fontSize = 14;

UIColor *arcColor = [UIColor blueColor];

if (_percent == 1) {

percent = @"100%";

fontSize = 14;

arcColor = (_arcFinishColor == nil) ? [UIColorgreenColor] : _arcFinishColor;

}else if(_percent < 1 && _percent >= 0){

fontSize = 13;

arcColor = (_arcUnfinishColor == nil) ? [UIColorblueColor] : _arcUnfinishColor;

percent = [NSStringstringWithFormat:@"%0.2f%%",_percent*100];

}

CGSize viewSize = self.bounds.size;

NSMutableParagraphStyle *paragraph = [[NSMutableParagraphStyle alloc] init];

paragraph.alignment = NSTextAlignmentCenter;

NSDictionary *attributes = [NSDictionarydictionaryWithObjectsAndKeys:[UIFontboldSystemFontOfSize:fontSize],NSFontAttributeName,arcColor,NSForegroundColorAttributeName,[UIColorclearColor],NSBackgroundColorAttributeName,paragraph,NSParagraphStyleAttributeName,nil];

[percent drawInRect:CGRectMake(5, (viewSize.height-fontSize)/2, viewSize.width-10, fontSize)withAttributes:attributes];

}

@end

具体的调用就是

ProgressView *progress = [[ProgressViewalloc]initWithFrame:CGRectMake(detil.width-65, 10, 60, 60)];

progress.arcFinishColor = COLOR_STRING(@"#75AB33");

progress.arcUnfinishColor = COLOR_STRING(@"#0D6FAE");

progress.arcBackColor = COLOR_STRING(@"#EAEAEA");

progress.percent = 1;

[detil addSubview:progress];