仿照余額寶余額動態變動

@implementation yuebaoView { NSTimer *_yesterdayIncomeLabelAnimationTimer; NSTimer *_totalMoneyAmountLabelAnimationTimer;}- (void)setNumberTextOfLabel:(UILabel *)label WithAnimationForValueContent:(CGFloat)value {CGFloat lastValue = [label.text floatValue];CGFloat delta = value - lastValue;if (delta == 0) return;if (delta > 0) {CGFloat ratio = value / 60.0;NSDictionary *userInfo = @{@"label" : label,@"value" : @(value),@"ratio" : @(ratio)};NSTimer *timer = [NSTimer scheduledTimerWithTimeInterval:0.02 target:self selector:@selector(setupLabel:) userInfo:userInfo repeats:YES];if (label == self.yesterdayIncomeLabel) {_yesterdayIncomeLabelAnimationTimer = timer;} else {_totalMoneyAmountLabelAnimationTimer = timer;} } }- (void)setupLabel:(NSTimer *)timer { NSDictionary *userInfo = timer.userInfo; UILabel *label = userInfo[@"label"]; CGFloat value = [userInfo[@"value"] floatValue]; CGFloat ratio = [userInfo[@"ratio"] floatValue];static int flag = 1; CGFloat lastValue = [label.text floatValue]; CGFloat randomDelta = (arc4random_uniform(2) + 1) * ratio; CGFloat resValue = lastValue + randomDelta;if ((resValue >= value) || (flag == 50)) {label.text = [NSString stringWithFormat:@"%.2f", value];flag = 1;[timer invalidate];timer = nil;return; } else {label.text = [NSString stringWithFormat:@"%.2f", resValue]; }flag++;}

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