IOS之动画加载的实现过程

来源：爱站网时间：2020-06-30编辑：网友分享

随着移动的互联普及到每个人的生活中，大家对动画效果的要求也越来越高，我们程序员也在不断的为大家带来不同的展现，今天是爱站技术频道小编为大家带来的IOS之动画加载的实现过程，让我们带大家一起来学习吧！

首先来看看效果图

实现过程如下

控制器调用就一句代码:

[self showLoadingInView:self.view];

方便控制器如此调用,就要为控制器添加一个分类

.h文件

#import 
#import "GQCircleLoadView.h"
@interface UIViewController (GQCircleLoad)
//显示动画
- (void)showLoadingInView:(UIView*)view;
//隐藏动画
- (void)hideLoad;
@property (nonatomic,strong) GQCircleLoadView *loadingView;
@end

.m文件

#import "UIViewController+GQCircleLoad.h"
#import 
@implementation UIViewController (GQCircleLoad)
- (GQCircleLoadView*)loadingView
{
 return objc_getAssociatedObject(self, @"loadingView");
}
- (void)setLoadingView:(GQCircleLoadView*)loadingView
{
 objc_setAssociatedObject(self, @"loadingView", loadingView, OBJC_ASSOCIATION_RETAIN_NONATOMIC);
}
- (void)showLoadingInView:(UIView*)view{
 if (self.loadingView == nil) {
  self.loadingView = [[GQCircleLoadView alloc]init];
 }
 if (view) {
  [view addSubview:self.loadingView];
  self.loadingView.frame = view.bounds;
 }else{
  UIWindow *appKeyWindow = [UIApplication sharedApplication].keyWindow;
  [appKeyWindow addSubview:self.loadingView];
  self.loadingView.frame = appKeyWindow.bounds;
 }
}
- (void)hideLoad{
 [self.loadingView removeFromSuperview];
}
@end

接下来就是GQCircleLoadView继承UIView,里面通过drawRect画出圆圈,并且动画的实现

#import "GQCircleLoadView.h"
#define WINDOW_width [[UIScreen mainScreen] bounds].size.width
#define WINDOW_height [[UIScreen mainScreen] bounds].size.height
static NSInteger circleCount = 3;
static CGFloat cornerRadius = 10;
static CGFloat magin = 15;
@interface GQCircleLoadView()
@property (nonatomic, strong) NSMutableArray *layerArr;
@end

@implementation GQCircleLoadView
- (instancetype)initWithFrame:(CGRect)frame{
 if (self = [super initWithFrame:frame]) {
  self.backgroundColor = [UIColor clearColor];
 }
 return self;
}
// 画圆
- (void)drawCircles{
 for (NSInteger i = 0; i =self.layerArr.count?0:(idx+1)];
    [self performSelector:@selector(drawAnimation:) withObject:nextlayer afterDelay:0.25];
    *stop = YES;
   }
  }];
 }
}
- (void)drawRect:(CGRect)rect{
 [super drawRect:rect];
 [self drawCircles];
}
- (NSMutableArray *)layerArr{
 if (_layerArr == nil) {
  _layerArr = [[NSMutableArray alloc] init];
 }
 return _layerArr;
}
@end

Demo就不上传了,总共四个文件代码已经全贴上了!

以上就是爱站技术频道小编为大家带来的 IOS之动画加载的实现过程，大家可以按照上述的代码进行修改，说不定会给项目带来不一样的效果。

IOS之动画加载的实现过程

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