小动画练习

小动画练习/** 小动画练习 */#import "SnowView.h"@interface SnowView()@property(nonatomic, assign) CGFloat snowY;@end@implementation SnowView- (void)drawRect:(CGRect)rect{        UIImage *image = [UIImage imageNamed:@"me"];    self.snowY++;    [image drawAtPoint:CGPointMake(0, self.snowY)];}/** *  完成初始化，调用此方法，写一个定时器 */- (void)awakeFromNib{    [NSTimer scheduledTimerWithTimeInterval:0.1 target:self selector:@selector(setNeedsDisplay) userInfo:nil repeats:YES];}@end