iPhone之实现自定义进度条Progress

iPhone之实现自定义进度条Progress

思路：没有继承UIProgressView，而是继承UIView，添加了两个UIImageView，一个是背影图，再在上面添加了一个填充图并把x坐标设置到屏的最左边，然后一个定时器，隔一段时间改变填充图的x的坐标，这样就实现了类似进度这样的效果。

效果图：

代码：

CustomProgress.h

//
//  CustomProgress.h
//  Chok_passenger
//
//  Created by 任海丽 on 13-7-11.
//  Copyright (c) 2013年 任海丽. All rights reserved.
//
 
#import <UIKit/UIKit.h>
 
@protocol  CustomProgressDelegate<NSObject>
//修改进度标签内容
- (void)changeTextProgress:(NSString*)string;
//进度条结束时
- (void)endTime;
@end
 
@interface CustomProgress : UIView
 
// 背景图像
@property (retain, nonatomic) UIImageView *trackView;
// 填充图像
@property (retain, nonatomic) UIImageView *progressView;
 
@property (retain, nonatomic) NSTimer *progressTimer; //时间定时器
@property (nonatomic) CGFloat targetProgress; //进度
@property (nonatomic) CGFloat currentProgress; //当前进度
 
@property (nonatomic, strong)id<CustomProgressDelegate> delegate;
 
- (void)setProgress:(CGFloat)progress;//设置进度
 
@end

CustomProgress.m

//
//  CustomProgress.m
//  Chok_passenger
//
//  Created by 任海丽 on 13-7-11.
//  Copyright (c) 2013年 任海丽. All rights reserved.
//
 
#import "CustomProgress.h"
 
@implementation CustomProgress
 
- (id)initWithFrame:(CGRect)frame
{
self = [super initWithFrame:frame];
if (self) {
self.backgroundColor = [UIColor clearColor];
// 背景图像
_trackView = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, frame.size.width, frame.size.height)];
[_trackView setImage:[UIImage imageNamed:@"wait_progress_back.png"]];
_trackView.clipsToBounds = YES;//当前view的主要作用是将出界了的_progressView剪切掉，所以需将clipsToBounds设置为YES
[self addSubview:_trackView];
// 填充图像
_progressView = [[UIImageView alloc] initWithFrame:CGRectMake(0-frame.size.width, 0, frame.size.width, frame.size.height)];
[_progressView setImage:[UIImage imageNamed:@"wait_progress.png"]];
[_trackView addSubview:_progressView];
 
_currentProgress = 0.0;
 
}
return self;
}
 
- (void)setProgress:(CGFloat)progress{
if (0 == progress) {
self.currentProgress = 0;
[self changeProgressViewFrame];
return;
}
 
_targetProgress = progress;
if (_progressTimer == nil)
{
//创建定时器
_progressTimer = [NSTimer scheduledTimerWithTimeInterval:1 target:self selector:@selector(moveProgress) userInfo:nil repeats:YES];
}
}
 
//////////////////////////////////////////////////////
//修改进度
- (void) moveProgress
{
//判断当前进度是否大于进度值
if (self.currentProgress < _targetProgress)
{
self.currentProgress = MIN(self.currentProgress + 0.1*_targetProgress, _targetProgress);
if (_targetProgress >=10) {
[_delegate changeTextProgress:[NSString stringWithFormat:@"%d %%",(int)self.currentProgress]];
}else{
[_delegate changeTextProgress:[NSString stringWithFormat:@"%.1f %%",self.currentProgress]];
}
 
//改变界面内容
[self changeProgressViewFrame];
 
} else {
//当超过进度时就结束定时器，并处理代理方法
[_progressTimer invalidate];
_progressTimer = nil;
[_delegate endTime];
}
}
//修改显示内容
- (void)changeProgressViewFrame{
//只要改变frame的x的坐标就能看到进度一样的效果
_progressView.frame = CGRectMake(self.frame.size.width * (_currentProgress/_targetProgress) - self.frame.size.width, 0, self.frame.size.width, self.frame.size.height);
}
 
@end

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