金额跳动效果
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");
}
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
}
显示金额动画
- (void)changeAnimation:(NSTimer *)timer{
NSMutableDictionary *info = timer.userInfo;
double begin = ((NSNumber *)[info objectForKey:kBeginNumberKey];
double end = ((NSNumber *)[info objectForKey:kEndNumberKey]).intValue;
double 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)]];
}
}
