iOS开发（OC）——一句话搞定加载等待动画

本文链接：https://blog.youkuaiyun.com/liumude123/article/details/84568061

本文介绍了如何通过优化处理，在网络请求快速完成时避免加载页面的闪现，确保至少0.5秒的显示时间，并提供了相应的.h和.m文件代码示例，以及GitHub上的demo地址和iOS开发交流群信息。

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(因为有加载的图片，所以想要看到最完整的效果，请点击 https://github.com/liumude/LoadingView 下载 iOS开发交流群：301058503（如果不是开发者，做广告的就不用进了，因为迟早都被踢）)

此加载页做了优化处理：在网络状态良好的情况下（1秒请求完毕），不会显示，防止闪现。有可能是1.1秒请求完毕，那样也会闪现，这里也做了处理，在显示加载页之后，至少0.5秒后才会隐藏（如果在显示之后的0.5秒内请求完毕，则显示0.5秒隐藏，如果在显示之后的0.5秒后请求完毕，则请求完毕之后隐藏）

.h文件

#import <UIKit/UIKit.h>

typedef enum : NSUInteger {
    RequestLoading,
    RequestSuccess,
    RequestFaild,
} RequestResult;

@interface JZLoadingViewPacket : UIView


- (void)showWithTitle:(NSString *)title result:(RequestResult)result;

- (void)jz_hide;

+ (JZLoadingViewPacket *)shareInstance;


+ (void)showWithTitle:(NSString *)title result:(RequestResult)result addToView:(UIView *)selfView;

@end

.m文件

#import "JZLoadingViewPacket.h"

@interface JZLoadingViewPacket ()

@property (nonatomic, strong) UIImageView *imageView;
@property (nonatomic, strong) UILabel *titleLabel;
@property (nonatomic, strong) UIView *bgView;


//控制显示后再隐藏的时间间隔>=1秒，提高用户体验
@property (nonatomic, assign) BOOL isShow;
@property (nonatomic, assign) BOOL isUseHiden;

@end

@implementation JZLoadingViewPacket


- (void)showWithTitle:(NSString *)title result:(RequestResult)result  {
    _isShow = NO;
    _isUseHiden = NO;
    self.hidden = NO;
    self.backgroundColor = [UIColor clearColor];
    
    self.titleLabel.text = title;

    if (result == RequestLoading) {
        self.imageView.image = [UIImage imageNamed:@"rotationImage"];
    }else if (result == RequestSuccess) {
        self.imageView.image = [UIImage imageNamed:@"requestSuccess"];
    }else if (result == RequestFaild) {
        self.imageView.image = [UIImage imageNamed:@"networkFaild"];
    }

    [self.imageView.layer removeAllAnimations];
    if (result == RequestLoading) {

        self.bgView.hidden = YES;
        self.imageView.hidden = YES;
        self.titleLabel.hidden = YES;
        [self performSelector:@selector(jz_show) withObject:nil afterDelay:1.0];
        
        CABasicAnimation *animation1 = [CABasicAnimation animationWithKeyPath:@"opacity"];
        //设置动画完成后保持原状
        animation1.fillMode = kCAFillModeForwards;
        anima