查詢時光或長或短,為了晉升用戶體驗,今朝用的比擬多的手腕之一就是查詢期待時添加一個靜態期待後果。當我們在要求收集時加載頁面時有個舉措後果,後果圖以下:
源代碼可以網上找開源項目Coding.net,下面的後果道理為兩張圖片組合,裡面誰人則為動畫遷移轉變,外面的圖標則是通明度的變更;重要代碼以下:
1:把它封裝在EaseLoadingView外面
@interface EaseLoadingView : UIView @property (strong, nonatomic) UIImageView *loopView, *monkeyView; @property (assign, nonatomic, readonly) BOOL isLoading; - (void)startAnimating; - (void)stopAnimating; @end @interface EaseLoadingView () @property (nonatomic, assign) CGFloat loopAngle, monkeyAlpha, angleStep, alphaStep; @end @implementation EaseLoadingView - (instancetype)initWithFrame:(CGRect)frame{ self = [super initWithFrame:frame]; if (self) { self.backgroundColor = [UIColor clearColor]; _loopView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"loading_loop"]]; _monkeyView = [[UIImageView alloc] initWithImage:[UIImage imageNamed:@"loading_monkey"]]; [_loopView setCenter:self.center]; [_monkeyView setCenter:self.center]; [self addSubview:_loopView]; [self addSubview:_monkeyView]; [_loopView mas_makeConstraints:^(MASConstraintMaker *make) { make.center.equalTo(self); }]; [_monkeyView mas_makeConstraints:^(MASConstraintMaker *make) { make.center.equalTo(self); }]; _loopAngle = 0.0; _monkeyAlpha = 1.0; _angleStep = 360/3; _alphaStep = 1.0/3.0; } return self; } - (void)startAnimating{ self.hidden = NO; if (_isLoading) { return; } _isLoading = YES; [self loadingAnimation]; } - (void)stopAnimating{ self.hidden = YES; _isLoading = NO; } - (void)loadingAnimation{ static CGFloat duration = 0.25f; _loopAngle += _angleStep; if (_monkeyAlpha >= 1.0 || _monkeyAlpha <= 0.0) { _alphaStep = -_alphaStep; } _monkeyAlpha += _alphaStep; [UIView animateWithDuration:duration delay:0.0 options:UIViewAnimationOptionCurveLinear animations:^{ CGAff.netransform loopAngleTransform = CGAffineTransformMakeRotation(_loopAngle * (M_PI / 180.0f)); _loopView.transform = loopAngleTransform; _monkeyView.alpha = _monkeyAlpha; } completion:^(BOOL finished) { if (_isLoading && [self superview] != nil) { [self loadingAnimation]; }else{ [self removeFromSuperview]; _loopAngle = 0.0; _monkeyAlpha = 1,0; _alphaStep = ABS(_alphaStep); CGAffineTransform loopAngleTransform = CGAffineTransformMakeRotation(_loopAngle * (M_PI / 180.0f)); _loopView.transform = loopAngleTransform; _monkeyView.alpha = _monkeyAlpha; } }]; } @end
留意loadingAnimation這外面有舉措的處置及通明度的處置,當停滯加載後把它自個從以後的視圖去除;
2:UIView (Common)在UIView擴大類裡
#pragma mark LoadingView @property (strong, nonatomic) EaseLoadingView *loadingView; - (void)beginLoading; - (void)endLoading; @end - (void)setLoadingView:(EaseLoadingView *)loadingView{ [self willChangeValueForKey:@"LoadingViewKey"]; objc_setAssociatedObject(self, &LoadingViewKey, loadingView, OBJC_ASSOCIATION_RETAIN_NONATOMIC); [self didChangeValueForKey:@"LoadingViewKey"]; } - (EaseLoadingView *)loadingView{ return objc_getAssociatedObject(self, &LoadingViewKey); } - (void)beginLoading{ for (UIView *aView in [self.blankPageContainer subviews]) { if ([aView isKindOfClass:[EaseBlankPageView class]] && !aView.hidden) { return; } } if (!self.loadingView) { //初始化LoadingView self.loadingView = [[EaseLoadingView alloc] initWithFrame:self.bounds]; } [self addSubview:self.loadingView]; [self.loadingView mas_makeConstraints:^(MASConstraintMaker *make) { make.self.edges.equalTo(self); }]; [self.loadingView startAnimating]; } - (void)endLoading{ if (self.loadingView) { [self.loadingView stopAnimating]; } }
留意:cocoa的KVO模子中,有兩種告訴不雅察者的方法,主動告訴和手動告訴。望文生義,主動告訴由cocoa在屬性值變更時主動告訴不雅察者,而手動告訴須要在值變更時挪用 willChangeValueForKey:和didChangeValueForKey: 辦法告訴挪用者。
3:應用頁面挪用
- (void)sendRequest{ [self.view beginLoading]; __weak typeof(self) weakSelf = self; [[Coding_NetAPIManager sharedManager] request_CodeFile:_myCodeFile withPro:_myProject andBlock:^(id data, NSError *error) { [weakSelf.view endLoading]; if (data) { weakSelf.myCodeFile = data; [weakSelf refreshCodeViewData]; } [weakSelf.view configBlankPage:EaseBlankPageTypeView hasData:(data != nil) hasError:(error != nil) reloadButtonBlock:^(id sender) { [weakSelf sendRequest]; }]; }]; }
個中[self.view beginLoading]跟[weakSelf.view endLoading]便可以挪用動畫後果;
彌補:另外一種是有許多分歧的圖片構成的動畫後果,可以用每張圖片然後FOR遍歷構成出舉措後果;
//設置通俗狀況的動繪圖片 NSMutableArray *idleImages = [NSMutableArray array]; for (NSUInteger i = 1; i<=60; ++i) { UIImage *image = [UIImage imageNamed:[NSString stringWithFormat:@"dropdown_anim__000%zd",i]]; [idleImages addObject:image]; [idleImages addObject:image]; }
以上內容是本文經由過程IOS期待時動畫後果的完成,願望對年夜家有所贊助。
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