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115 lines
2.8 KiB
115 lines
2.8 KiB
// |
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// UILabel+BezierAnimation.m |
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// Test |
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// |
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// Created by senro wang on 15/8/11. |
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// Copyright (c) 2015年 王燊. All rights reserved. |
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// |
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#import "UILabel+BezierAnimation.h" |
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#import "WSBezier.h" |
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#define KMaxTimes 50 |
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@implementation UILabel (BezierAnimation) |
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NSMutableArray *totlePoints; //记录所有的点。 |
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WSBezier *bezier; //通过 改变bezier 函数的参数 （也就是 四个 控制点）可以改变动画的样式 － |
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float _duration; // 动画 间隔 |
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float _fromNum; |
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float _toNum; |
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float _lastTime; //记录每一个点的 时刻 |
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int _index; |
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//- (instancetype)initWithFrame:(CGRect)frame{ |
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// |
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// if (self = [super initWithFrame:frame]) { |
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// |
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// [self _initBezier]; |
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// [self _cleanVars]; |
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// } |
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// |
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// return self; |
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//} |
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- (void)_cleanVars{ |
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_lastTime = 0; |
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_index = 0; |
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self.text = @"0"; |
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} |
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//初始化 控制点 |
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- (void)_initBezier{ |
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bezier = [[WSBezier alloc] init]; |
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} |
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- (void)animationFromnum:(float)fromNum toNum:(float)toNum duration:(float)duration precision:(NSString*)precision{ |
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[self _initBezier]; |
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[self _cleanVars]; |
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_duration = duration; |
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_fromNum = fromNum; |
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_toNum = toNum; |
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totlePoints = [NSMutableArray array]; |
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float dt = 1.0 / (KMaxTimes - 1); |
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for (NSInteger i = 0; i < KMaxTimes; i ++ ) { |
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WSPoint point = [bezier pointWithdt:dt * i]; |
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float currTime = point.x * _duration; |
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float currValue = point.y * (_toNum - _fromNum) + _fromNum; |
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NSArray *array = [NSArray arrayWithObjects:[NSNumber numberWithFloat:currTime] , [NSNumber numberWithFloat:currValue], nil]; |
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[totlePoints addObject:array]; |
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} |
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[self changeNumberNoBySelectorWithPrecision:precision]; |
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} |
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- (void)changeNumberNoBySelectorWithPrecision:(NSString*)precision { |
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if (_index>= KMaxTimes) { |
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if([precision containsString:@"d"]){ |
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self.text = [NSString stringWithFormat:precision,(int)_toNum]; |
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}else{ |
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self.text = [NSString stringWithFormat:precision,_toNum]; |
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} |
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return; |
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} else { |
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NSArray *pointValues = [totlePoints objectAtIndex:_index]; |
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_index++; |
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float value = [(NSNumber *)[pointValues objectAtIndex:1] floatValue]; |
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float currentTime = [(NSNumber *)[pointValues objectAtIndex:0] floatValue]; |
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float timeDuration = currentTime - _lastTime; |
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_lastTime = currentTime; |
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if([precision containsString:@"d"]){ |
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self.text = [NSString stringWithFormat:precision,(int)value]; |
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}else{ |
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self.text = [NSString stringWithFormat:precision,value]; |
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} |
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[self performSelector:@selector(changeNumberNoBySelectorWithPrecision:) withObject:precision afterDelay:timeDuration]; |
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} |
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} |
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@end
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