如何递归执行view的动画
效果:
山寨的源头:
图片素材:
源码:
//
// ViewController.m
// RepeatAnimationView
//
// Created by YouXianMing on 15/1/30.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
// #import "ViewController.h" @interface ViewController () @property (nonatomic, strong) UIImageView *imageView; @property (nonatomic) CGRect startRect;
@property (nonatomic) CGRect centerRect;
@property (nonatomic) CGRect endRect; @property (nonatomic) CGFloat distanceFromStartToCenter;
@property (nonatomic) CGFloat distanceFromCenterToEnd; @end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad]; self.distanceFromStartToCenter = .f;
self.distanceFromCenterToEnd = .f; // 背景色
self.view.backgroundColor = [UIColor blackColor]; // 红色图片
self.imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"red"]];
self.imageView.center = self.view.center;
self.imageView.alpha = ;
[self.view addSubview:self.imageView]; // 设置rect
self.startRect = self.imageView.frame; CGRect tmpRect = self.startRect;
tmpRect.origin.y -= self.distanceFromStartToCenter;
self.centerRect = tmpRect; tmpRect = self.centerRect;
tmpRect.origin.y -= self.distanceFromCenterToEnd;
self.endRect = tmpRect; // 递归调用
[self doAnimation];
} - (void)doAnimation {
[UIView animateWithDuration:.f
delay:0.2f
options:UIViewAnimationOptionCurveEaseInOut
animations:^{ self.imageView.alpha = .f;
self.imageView.frame = self.centerRect; } completion:^(BOOL finished) { [UIView animateWithDuration:0.5f
delay:0.1f
options:UIViewAnimationOptionCurveEaseInOut
animations:^{ self.imageView.alpha = .f;
self.imageView.frame = self.endRect; } completion:^(BOOL finished) { self.imageView.frame = self.startRect;
[self doAnimation];
}];
}];
} @end
//
// ViewController.m
// RepeatAnimationView
//
// Created by YouXianMing on 15/1/30.
// Copyright (c) 2015年 YouXianMing. All rights reserved.
// #import "ViewController.h" @interface ViewController () @property (nonatomic, strong) UIImageView *imageView;
@property (nonatomic, strong) UIImageView *cyanView; @property (nonatomic) CGRect startRect;
@property (nonatomic) CGRect centerRect;
@property (nonatomic) CGRect endRect; @property (nonatomic) CGFloat distanceFromStartToCenter;
@property (nonatomic) CGFloat distanceFromCenterToEnd; @end @implementation ViewController - (void)viewDidLoad {
[super viewDidLoad]; self.distanceFromStartToCenter = .f;
self.distanceFromCenterToEnd = .f; // 背景色
self.view.backgroundColor = [UIColor blackColor]; // 红色图片
self.imageView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"red"]];
self.imageView.center = self.view.center;
self.imageView.alpha = ;
[self.view addSubview:self.imageView]; self.cyanView = [[UIImageView alloc] initWithFrame:self.imageView.bounds];
self.cyanView.image = [UIImage imageNamed:@"cyan"];
[self.imageView addSubview:self.cyanView]; // 设置rect
self.startRect = self.imageView.frame; CGRect tmpRect = self.startRect;
tmpRect.origin.y -= self.distanceFromStartToCenter;
self.centerRect = tmpRect; tmpRect = self.centerRect;
tmpRect.origin.y -= self.distanceFromCenterToEnd;
self.endRect = tmpRect; // 递归调用
[self doAnimation];
} - (void)doAnimation {
[UIView animateWithDuration:.f
delay:0.2f
options:UIViewAnimationOptionCurveEaseInOut
animations:^{ self.imageView.alpha = .f;
self.imageView.frame = self.centerRect;
self.cyanView.alpha = 0.5; } completion:^(BOOL finished) { [UIView animateWithDuration:0.5f
delay:0.1f
options:UIViewAnimationOptionCurveEaseInOut
animations:^{ self.imageView.alpha = .f;
self.imageView.frame = self.endRect;
self.cyanView.alpha = .f; } completion:^(BOOL finished) { self.imageView.frame = self.startRect;
self.cyanView.alpha = .f;
[self doAnimation];
}];
}];
} @end