iOS使用UIBezierPath实现ProgressView
使用UIBezierPath实现ProgressView实现的效果如下:
界面采用UITableView和TabelViewCell的实现,红色的视图采用UIBezierPath绘制.注意红色的部分左上角,左下角是直角哟!!!!不多说<这里才是用UIBezierPath实现的真正愿意啦!!!😆>,代码如下:
控制器代码:
// // 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
TabelViewCell代码:
// // 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代码:
// // 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
是不是超级简单。
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