开发小技巧总结

1、滑动的时候隐藏navigation  bar

navigationController.hidesBarsOnSwipe = Yes;

 2、消除导航条返回键自带的title

[[UIBarButtonItem appearance] setBackButtonTitlePositionAdjustment:UIOffsetMake(0, -60)
                                                 forBarMetrics:UIBarMetricsDefault];

 3、将导航条变得透明而不模糊

[self.navigationController.navigationBar setBackgroundImage:[UIImage new]
                         forBarMetrics:UIBarMetricsDefault];
self.navigationController.navigationBar .shadowImage = [UIImage new];
self.navigationController.navigationBar .translucent = YES;

 4、拉伸图片不变形

[[UIImage imageNamed:@""] stretchableImageWithLeftCapWidth:10 topCapHeight:10];
[[UIImage imageNamed:@""] resizableImageWithCapInsets:UIEdgeInsetsMake(10, 10, 10, 10)];

 5、gif图片显示优化

FLAnimatedImage可以帮你完成GIF的显示处理。解决GIF显示卡顿的情况。

FLAnimatedImage *image = [FLAnimatedImage animatedImageWithGIFData:[NSData dataWithContentsOfURL:[NSURL URLWithString:@"https://upload.wikimedia.org/wikipedia/commons/2/2c/Rotating_earth_%28large%29.gif"]]];
FLAnimatedImageView *imageView = [[FLAnimatedImageView alloc] init];
imageView.animatedImage = image;
imageView.frame = CGRectMake(0.0, 0.0, 100.0, 100.0);
[self.view addSubview:imageView];

 6、CollectionView实现tableview的悬停header

CSStickyHeaderFlowLayout可以解决您的疑问。

#import "CSStickyHeaderFlowLayout.h"
- (void)viewDidLoad {
 [super viewDidLoad]; // Locate your layout     
CSStickyHeaderFlowLayout *layout = (id)self.collectionViewLayout;
if ([layout isKindOfClass:[CSStickyHeaderFlowLayout class]]) { 
layout.parallaxHeaderReferenceSize = CGSizeMake(320, 200);
 } 
}


- (UICollectionReusableView *)collectionView:(UICollectionView *)collectionView viewForSupplementaryElementOfKind:(NSString *)kind atIndexPath:(NSIndexPath *)indexPath { // Check the kind if it's CSStickyHeaderParallaxHeader 
if ([kind isEqualToString:CSStickyHeaderParallaxHeader]) { 
UICollectionReusableView *cell = [collectionView dequeueReusableSupplementaryViewOfKind:kind withReuseIdentifier:@"header" forIndexPath:indexPath];
 return cell; 
} 
}

 

转载于:https://www.cnblogs.com/angongIT/p/5707275.html