前言
金额效果，因为觉得公司目前的金额太乏味，决定加点效果，也特此写了个小demo，代码非常简单，贴代码方便大家看看
通过 runtime 建立属性(setter/getter方法)
/** 由于分类中要添加属性，所以通过runtime方法来实现 */
- (void)setAnimatedNumber:(NSNumber *)animatedNumber {objc_setAssociatedObject(self, "animatedNumber", animatedNumber, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}- (NSNumber *)animatedNumber {return objc_getAssociatedObject(self, "animatedNumber");
}- (void)setTimer:(NSTimer *)timer {objc_setAssociatedObject(self, "timer", timer, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}- (NSTimer *)timer {return objc_getAssociatedObject(self, "timer");
}- (void)setValueString:(NSString *)valueString {objc_setAssociatedObject(self, "valueString", valueString, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}- (NSString *)valueString {return objc_getAssociatedObject(self, "valueString");
}
复制代码变量初始化以及定时器
- (void)dw_setNumber:(NSNumber *)number {[self dw_setNumber:number duration:5.0]; //这里，我写5秒，是为了方便我录gif，使用中可以改为1或者2
}
复制代码显示金额动画
- (void)changeAnimation:(NSTimer *)timer{NSMutableDictionary *info = timer.userInfo;int begin = (int)[info objectForKey:kBeginNumberKey];int end = ((NSNumber *)[info objectForKey:kEndNumberKey]).intValue;int range = ((NSNumber *)[info objectForKey:kRangeNumberKey]).intValue;NSNumberFormatter *formatter = [[NSNumberFormatter alloc] init];[formatter setNumberStyle:NSNumberFormatterNoStyle];[formatter setFormatWidth:9];[formatter setPositiveFormat:@",##0.00"];int value = self.valueString.intValue;if (value == 0) {self.valueString = [NSString stringWithFormat:@"%d", begin];self.text = [NSString stringWithFormat:@"%.@",[formatter stringFromNumber:@(begin)]];} else if (value >= end) {self.text = [NSString stringWithFormat:@"%.@",[formatter stringFromNumber:@(end)]];[self.timer invalidate];self.timer = nil;return;} else {value += range;self.valueString = [NSString stringWithFormat:@"%d", value];self.text = [NSString stringWithFormat:@"%.@",[formatter stringFromNumber:@(value)]];}}
复制代码代码传送门
