+ (nullable UIImage *)imageNamed:(NSString *)name;
根据name生成图片
系统有缓存,程序员无法回收
+ (nullable UIImage *)imageWithContentsOfFile:(NSString *)path;
根据路径加载图片
只要没有强引用,就会回收,传入全路径,不能加载Assets里面的图片
+ (nullable UIImage *)animatedImageWithImages:(NSArray<UIImage *> *)images duration:(NSTimeInterval)duration NS_AVAILABLE_IOS(5_0);
根据数组和持续时间生成动画图片
images:动画图片数组
duration:动画持续时间
案例(动画图片)
- (void)setupUI {
//创建图片数组
NSMutableArray *arrayM = [NSMutableArray array];
for (int i = 1; i <= 25; i++) {
//图片名称
NSString *imageName = [NSString stringWithFormat:@"father%03d",i];
//创建UIImage
UIImage *image = [UIImage imageNamed:imageName];
//添加到数组
[arrayM addObject:image];
}
//参数1:要动画的图片数组
//参数2:动画持续时间
UIImage *img = [UIImage animatedImageWithImages:arrayM duration:2];
//创建UIImageView
UIImageView *iv = [[UIImageView alloc] initWithFrame:CGRectMake(0, 0, 200, 150)];
//设置位置
iv.center = self.view.center;
//设置图片
iv.image = img;
//添加到父容器
[self.view addSubview:iv];
}
