120 lines
2.5 KiB
Mathematica
120 lines
2.5 KiB
Mathematica
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// YJWebProgressLayer.m
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// YJWebProgressLayer
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//
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// Created by Kean on 2016/12/15.
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// Copyright © 2016年 Kean. All rights reserved.
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//
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#import "YJWebProgressLayer.h"
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#import "NSTimer+addition.h"
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//#define SCREEN_WIDTH [UIScreen mainScreen].bounds.size.width
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static NSTimeInterval const kFastTimeInterval = 0.03;
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@interface YJWebProgressLayer ()
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@property (nonatomic, strong) CAShapeLayer *layer;
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@property (nonatomic, strong) NSTimer *timer;
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@property (nonatomic, assign) CGFloat plusWidth; // 线条分为无数个点，线条的增加点的宽度
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@end
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@implementation YJWebProgressLayer
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- (instancetype)init {
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if (self = [super init]) {
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[self initialize];
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}
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return self;
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}
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- (void)dealloc {
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[self closeTimer];
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}
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- (void)initialize {
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// 绘制贝赛尔曲线
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UIBezierPath * path = [UIBezierPath bezierPath];
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[path moveToPoint:CGPointMake(0, 3)]; // 起点
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[path addLineToPoint:CGPointMake(SCREEN_WIDTH, 3)]; // 终点
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self.path = path.CGPath;
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self.strokeEnd = 0;
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_plusWidth = 0.005;
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self.lineWidth = 2;
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self.strokeColor = [UIColor orangeColor].CGColor; // 设置进度条的颜色
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_timer = [NSTimer scheduledTimerWithTimeInterval:kFastTimeInterval target:self selector:@selector(pathChanged:) userInfo:nil repeats:YES];
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[_timer pauseTime];
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}
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// 设置进度条增加的进度
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- (void)pathChanged:(NSTimer *)timer {
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self.strokeEnd += _plusWidth;
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if (self.strokeEnd > 0.60) {
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_plusWidth = 0.002;
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}
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if (self.strokeEnd > 0.85) {
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_plusWidth = 0.0007;
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}
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if (self.strokeEnd > 0.93) {
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_plusWidth = 0;
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}
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}
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// 使用的是 WKWebView 在用KVO计算实际的读取进度时，调用该方法
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- (void)wkWebViewPathChanged:(CGFloat)estimatedProgress {
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self.strokeEnd = estimatedProgress;
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}
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- (void)startLoad {
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[_timer webPageTimeWithTimeInterval:kFastTimeInterval];
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}
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- (void)finishedLoadWithError:(NSError *)error {
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CGFloat timer;
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if (error == nil) {
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[self closeTimer];
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timer = 0.5;
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self.strokeEnd = 1.0;
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}else {
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timer = 45.0;
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}
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dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(timer * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
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if (timer == 45.0) [self closeTimer];
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self.hidden = YES;
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[self removeFromSuperlayer];
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});
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}
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#pragma mark - private
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- (void)closeTimer {
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[_timer invalidate];
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_timer = nil;
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}
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@end
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