import <Foundation/Foundation.h>
@interface NSTimer (addition)
- (void)pause;
- (void)resume;
- (void)resumeWithTimeInterval:(NSTimeInterval)time;
@end
import "NSTimer+addition.h"
@implementation NSTimer (addition)
(void)pause {
if (!self.isValid) return;
[self setFireDate:[NSDate distantFuture]];
}(void)resume {
if (!self.isValid) return;
[self setFireDate:[NSDate date]];
}(void)resumeWithTimeInterval:(NSTimeInterval)time {
if (!self.isValid) return;
[self setFireDate:[NSDate dateWithTimeIntervalSinceNow:time]];
}
@end
@interface RGWebProgressLayer : CAShapeLayer
(void)finishedLoad;
(void)startLoad;
(void)closeTimer;
@end
import "RGWebProgressLayer.h"
import "NSTimer+addition.h"
static NSTimeInterval const kFastTimeInterval = 0.003;
@implementation RGWebProgressLayer{
CAShapeLayer *_layer;
NSTimer *_timer;
CGFloat _plusWidth; ///< 增加點(diǎn)
}
- (instancetype)init {
if (self = [super init]) {
[self initialize];
}
return self;
}
-
(void)initialize {
self.lineWidth = 2;
self.strokeColor = [UIColor greenColor].CGColor;_timer = [NSTimer scheduledTimerWithTimeInterval:kFastTimeInterval target:self selector:@selector(pathChanged:) userInfo:nil repeats:YES];
[_timer pause];UIBezierPath *path = [UIBezierPath bezierPath];
[path moveToPoint:CGPointMake(0, 2)];
[path addLineToPoint:CGPointMake(KScreen_Width, 2)];self.path = path.CGPath;
self.strokeEnd = 0;
_plusWidth = 0.01;
} -
(void)pathChanged:(NSTimer *)timer {
self.strokeEnd += _plusWidth;if (self.strokeEnd > 0.8) {
_plusWidth = 0.002;
}
} (void)startLoad {
[_timer resumeWithTimeInterval:kFastTimeInterval];
}-
(void)finishedLoad {
[self closeTimer];self.strokeEnd = 1.0;
dispatch_after(dispatch_time(DISPATCH_TIME_NOW, (int64_t)(0.25 * NSEC_PER_SEC)), dispatch_get_main_queue(), ^{
self.hidden = YES;
[self removeFromSuperlayer];
});
} (void)dealloc {
// NSLog(@"progressView dealloc");
[self closeTimer];
}
pragma mark - private
- (void)closeTimer {
[_timer invalidate];
_timer = nil;
}
