Snail—UI学习之动画Animations

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直接上代码，看的不深，以后再做详细讲解

#import "WJJRootViewController.h"@interface WJJRootViewController (){//把view设为全局变量UIView * _view;
}@end@implementation WJJRootViewController- (id)initWithNibName:(NSString *)nibNameOrNil bundle:(NSBundle *)nibBundleOrNil
{self = [super initWithNibName:nibNameOrNil bundle:nibBundleOrNil];if (self) {// Custom initialization}return self;
}- (void)viewDidLoad
{[super viewDidLoad];// Do any additional setup after loading the view.self.view.backgroundColor = [UIColor grayColor];_view = [[UIView alloc] initWithFrame:CGRectMake(300, 400, 20, 20)];_view.tag = 250;_view.backgroundColor = [UIColor purpleColor];[self.view addSubview:_view];//动画执行第一种方法UIButton * button1 = [UIButton buttonWithType:UIButtonTypeSystem];button1.tag = 1;button1.frame = CGRectMake(0, 460,

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