iOS使用UIBezierPath实现ProgressView

//// ViewController.m// ProgressViewDemo//// Created by 思 彭 on 2017/4/20.// Copyright © 2017年 思 彭. All rights reserved.//#import "ViewController.h"#import "ProgressTableViewCell.h"@interface ViewController ()<UITableViewDelegate, UITableViewDataSource>@property (nonatomic, strong) UITableView *tableView;@property (nonatomic, strong) CAShapeLayer *layer;@end@implementation ViewController- (void)viewDidLoad {  [super viewDidLoad];  self.navigationItem.title = @"ProgressDemo";  [self setUI];}#pragma mark - 设置界面- (void)setUI {    self.tableView = [[UITableView alloc]initWithFrame:CGRectMake(0, 0, self.view.frame.size.width, self.view.frame.size.height) style:UITableViewStyleGrouped];  self.tableView.delegate = self;  self.tableView.dataSource = self;  self.tableView.backgroundColor = [UIColor clearColor];  // 注册cell  [self.tableView registerClass:[ProgressTableViewCell class] forCellReuseIdentifier:@"cell"];  self.tableView.tableFooterView = [[UIView alloc]init];  [self.view addSubview:self.tableView];}#pragma mark - UITableViewDataSource- (NSInteger)numberOfSectionsInTableView:(UITableView *)tableView {    return 1;}- (NSInteger)tableView:(UITableView *)tableView numberOfRowsInSection:(NSInteger)section {    return 5;}- (UITableViewCell *)tableView:(UITableView *)tableView cellForRowAtIndexPath:(NSIndexPath *)indexPath {    ProgressTableViewCell *cell = [tableView dequeueReusableCellWithIdentifier:@"cell" forIndexPath:indexPath];  return cell;}#pragma mark - UITableViewDelegate- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section {    return 0.001f;;}- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section {    return 0.0001f;}- (CGFloat)tableView:(UITableView *)tableView heightForRowAtIndexPath:(NSIndexPath *)indexPath {    return 44;}@end

//// ProgressTableViewCell.m// ProgressViewDemo//// Created by 思 彭 on 2017/4/21.// Copyright © 2017年 思 彭. All rights reserved.//#import "ProgressTableViewCell.h"#import "Masonry.h"#import "ProgressView.h"@interface ProgressTableViewCell ()@property (nonatomic, strong) UILabel *titleLabel;@property (nonatomic, strong) ProgressView *progressView;@property (nonatomic, strong) UILabel *numberLabel;@end@implementation ProgressTableViewCell- (void)awakeFromNib {  [super awakeFromNib];  // Initialization code}- (instancetype)initWithStyle:(UITableViewCellStyle)style reuseIdentifier:(NSString *)reuseIdentifier {    if (self = [super initWithStyle:style reuseIdentifier:reuseIdentifier]) {    [self createSubViews];    [self layOut];  }  return self;}- (void)createSubViews {    self.titleLabel = [[UILabel alloc]init];  self.titleLabel.font = [UIFont systemFontOfSize:16];  self.titleLabel.text = @"西单大悦城";  self.titleLabel.textAlignment = NSTextAlignmentLeft;  [self.contentView addSubview:self.titleLabel];  self.progressView = [[ProgressView alloc]init];  self.progressView.backgroundColor = [UIColor whiteColor];  self.progressView.progress = arc4random_uniform(100) + 40;  [self.contentView addSubview:self.progressView];  self.numberLabel = [[UILabel alloc]init];  self.numberLabel.font = [UIFont systemFontOfSize:16];  self.numberLabel.text = @"￥2000";  self.numberLabel.textAlignment = NSTextAlignmentRight;  [self.contentView addSubview:self.numberLabel];}- (void)layOut {    [self.titleLabel mas_makeConstraints:^(MASConstraintMaker *make) {    make.left.mas_equalTo(self.contentView).offset(10);    make.centerY.mas_equalTo(self.contentView);//    make.width.greaterThanOrEqualTo(@(70));    make.width.mas_equalTo(self.contentView.frame.size.width * 0.3);  }];  [self.progressView mas_makeConstraints:^(MASConstraintMaker *make) {    make.left.mas_equalTo(self.titleLabel.mas_right).offset(10);    make.height.mas_equalTo(20);    make.centerY.mas_equalTo(self.titleLabel.mas_centerY);    make.width.mas_equalTo(self.contentView.frame.size.width * 0.4);  }];  [self.numberLabel mas_makeConstraints:^(MASConstraintMaker *make) {    make.left.mas_equalTo(self.progressView.mas_right).offset(10);    make.centerY.mas_equalTo(self.contentView);    make.right.mas_equalTo(self.contentView).offset(-10);  }];}@end

//// ProgressView.m// ProgressViewDemo//// Created by 思 彭 on 2017/4/20.// Copyright © 2017年 思 彭. All rights reserved.//#import "ProgressView.h"@interface ProgressView ()@end@implementation ProgressView-(void)drawRect:(CGRect)rect{    // 创建贝瑟尔路径    /*  CGFloat width = self.progress / rect.size.width * rect.size.width;  // 显示的宽度 = 服务器返回的数值 / 设置的总宽度 * 满值;      显示的宽度= 满值 * 比例值   比例值 = 服务器返回的宽度 / 满值   */    CGFloat width = rect.size.width * self.progress / rect.size.width;   // 显示的宽度 = 服务器返回的数值 * 设置的总宽度 / 满值;  UIBezierPath *path = [UIBezierPath bezierPathWithRoundedRect:CGRectMake(0, 0, width, rect.size.height) byRoundingCorners:UIRectCornerTopRight|UIRectCornerBottomRight cornerRadii:CGSizeMake(rect.size.height, rect.size.height)];  [[UIColor redColor] setFill];  [path fill];}- (void)setProgress:(CGFloat)progress{    _progress = progress;  // 重绘，系统会先创建与view相关联的上下文，然后再调用drawRect  [self setNeedsDisplay];}@end