94 lines
2.9 KiB
Mathematica
94 lines
2.9 KiB
Mathematica
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// SDWaitingView.m
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// SDPhotoBrowser
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//
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// Created by aier on 15-2-6.
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// Copyright (c) 2015年 GSD. All rights reserved.
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//
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#import "SDWaitingView.h"
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//// 图片下载进度指示器背景色
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//#define SDWaitingViewBackgroundColor [UIColor colorWithRed:0 green:0 blue:0 alpha:0.7]
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//
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//// 图片下载进度指示器内部控件间的间距
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//
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//#define SDWaitingViewItemMargin 10
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@implementation SDWaitingView
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- (id)initWithFrame:(CGRect)frame
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{
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self = [super initWithFrame:frame];
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if (self) {
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self.backgroundColor = SDWaitingViewBackgroundColor;
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self.layer.cornerRadius = 5;
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self.clipsToBounds = YES;
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self.mode = SDWaitingViewModeLoopDiagram;
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}
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return self;
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}
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- (void)setProgress:(CGFloat)progress
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{
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_progress = progress;
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// NSLog(@"%@",[NSThread currentThread]);
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//将重绘操作放在主线程，解决自动布局控制台报错的问题
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dispatch_async(dispatch_get_main_queue(), ^{
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[self setNeedsDisplay];
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if (progress >= 1) {
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[self removeFromSuperview];
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}
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});
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}
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- (void)drawRect:(CGRect)rect
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{
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CGContextRef ctx = UIGraphicsGetCurrentContext();
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CGFloat xCenter = rect.size.width * 0.5;
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CGFloat yCenter = rect.size.height * 0.5;
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[[UIColor whiteColor] set];
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switch (self.mode) {
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case SDWaitingViewModePieDiagram:
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{
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CGFloat radius = MIN(rect.size.width * 0.5, rect.size.height * 0.5) - SDWaitingViewItemMargin;
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CGFloat w = radius * 2 + SDWaitingViewItemMargin;
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CGFloat h = w;
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CGFloat x = (rect.size.width - w) * 0.5;
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CGFloat y = (rect.size.height - h) * 0.5;
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CGContextAddEllipseInRect(ctx, CGRectMake(x, y, w, h));
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CGContextFillPath(ctx);
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[SDWaitingViewBackgroundColor set];
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CGContextMoveToPoint(ctx, xCenter, yCenter);
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CGContextAddLineToPoint(ctx, xCenter, 0);
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CGFloat to = - M_PI * 0.5 + self.progress * M_PI * 2 + 0.001; // 初始值
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CGContextAddArc(ctx, xCenter, yCenter, radius, - M_PI * 0.5, to, 1);
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CGContextClosePath(ctx);
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CGContextFillPath(ctx);
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}
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break;
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default:
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{
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CGContextSetLineWidth(ctx, 15);
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CGContextSetLineCap(ctx, kCGLineCapRound);
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CGFloat to = - M_PI * 0.5 + self.progress * M_PI * 2 + 0.05; // 初始值0.05
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CGFloat radius = MIN(rect.size.width, rect.size.height) * 0.5 - SDWaitingViewItemMargin;
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CGContextAddArc(ctx, xCenter, yCenter, radius, - M_PI * 0.5, to, 0);
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CGContextStrokePath(ctx);
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}
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break;
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}
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}
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@end
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