标签：ios开发 导航 图片 存储 uiwebview
在NavigationController中 重写 show／pushViewController方法统一在导航栏中添加按钮
- (void)showViewController:(UIViewController
*)vc sender:(id)sender
{
if (self.viewControllers.count
>
0) {
//首页不显示跳转可以通过只添加leftBtn来间接修改所有返回按钮的图片
vc.hidesBottomBarWhenPushed
=
YES;
vc.navigationItem.leftBarButtonItem
= [[UIBarButtonItem
alloc]initWithTitle:@"left"
style:UIBarButtonItemStylePlain
target:self
action:@selector(back)];
vc.navigationItem.rightBarButtonItem
= [[UIBarButtonItem
alloc]initWithBarButtonSystemItem:UIBarButtonSystemItemCamera
target:self
action:nil];
}
[super
showViewController:vc
sender:sender];
}
- (void)back
{
[self
popViewControllerAnimated:YES];
}
计算文件/文件夹体积 并删除
NSFileManager
*mgr = [NSFileManager
defaultManager];
NSString *rootPath =
@"/Users/wanghong/Desktop/test";
NSArray *subPaths = [mgr
subpathsAtPath:rootPath];
long
long totolSize =
0;
for (NSString
*pathString
in subPaths) {
NSString *path = [rootPath
stringByAppendingPathComponent:pathString];
//NSLog(@"%@",path);
BOOL dir =
NO;
[mgr
fileExistsAtPath:path
isDirectory:&dir];
if (dir ==
NO) {
totolSize += [[mgr
attributesOfItemAtPath:path
error:nil][NSFileSize]
longLongValue];
}
}
CGFloat size = totolSize/1000.0/1000.0;
//size结果字节为单位
_sizeLabel.text
= [NSString
stringWithFormat:@"%fMB",size];
//CLEAN
[mgr
removeItemAtPath:rootPath
error:nil];
修改UIView或其子类的边框为圆角
[btn.layer
setCornerRadius:(btn.frame.size.height/2)];
btn.layer.borderWidth =
2.0f;
self.diskBtn.layer.masksToBounds
=
YES;(有时候需要裁剪)
SDWebImage 清除位于ache文件夹下的缓存
[[SDWebImageManager sharedManager].imageCache clearDisk]; 用clear不是clean
将image存储到相机胶卷中
UIImage
*image = [UIImage
imageNamed:@"ceshi"];
UIImageWriteToSavedPhotosAlbum(image,
NULL,
NULL,
NULL);
创建屏幕快照，返回UIView（用CoreGraphic可以转为UIImage）
[self.view
snapshotViewAfterScreenUpdates:NO]
UIPanGestureRecognizer 有时候会影响 UITableView 的
Scroll 操作。由于你已经设置了 Cell 的 Pan 手势识别器 的 UIGestureRecognizerDelegate ，你只需要实现一个（有些滑稽且冗长命名的）
delegate 方法即可将一切恢复正常。
- (BOOL)gestureRecognizer:(UIGestureRecognizer
*)gestureRecognizer shouldRecognizeSimultaneouslyWithGestureRecognizer:(UIGestureRecognizer
*)otherGestureRecognizer
{
return
NO;
}
NSData
*gif = [NSData
dataWithContentsOfFile: [[NSBundle
mainBundle]
pathForResource:self.imageName
ofType:@"gif"]];
self.gifView
= [[UIWebView
alloc]init];
self.gifView.frame
=
CGRectMake(0,
0,
self.frame.size.width,
kCellHeight);
self.gifView.userInteractionEnabled
=
NO;
[self.gifView
loadData:gif
MIMEType:@"image/gif"
textEncodingName:nil
baseURL:nil];
self.gifView.scalesPageToFit =
YES;
重写push控制器的方法取消导航控制器的动画
- (void)pushViewController:(UIViewController
*)viewController animated:(BOOL)animated
{
//
不需要动画
[super
pushViewController:viewController
animated:NO];
}
整理IOS开发常用小Tips
标签：ios开发 导航 图片 存储 uiwebview
原文地址：http://blog.csdn.net/sinat_19587549/article/details/46276471
