iOS学习笔记
快捷方式查询Xcode的苹果开发文档:
command+shift+0
工程中使用PCH文件时，需在targets—>Build Settings—>Prefix Header项加入相对路径$(PROJECT_DIR)/$(PROJECT_NAME)/PrefixHeader.pch
邮件
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"mailto://devprograms@apple.com"]];
电话
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"tel://8004664411"]];
sms
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"sms://466453"]];
浏览器
[[UIApplication sharedApplication] openURL:[NSURL URLWithString:@"http://itunesconnect.apple.com"]];
*****************************************************************颜色处理******************************************************************
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
***********************获取手机iOS系统的版本号******************************
[[[UIDevice currentDevice] systemVersion] floatValue]
获取手机的唯一标示符
NSString *str = [UIDevice currentDevice].identifierForVendor.UUIDString;
NSLog(@"%@",str);
[[ASIdentifierManager sharedManager].advertisingIdentifier UUIDString];
一、使用advertisingIdentifier步骤
1、添加框架
AdSupport.framework
2、添加头文件
#import <AdSupport/ASIdentifierManager.h>
3、使用语句
NSString *adId = [[[ASIdentifierManager sharedManager] advertisingIdentifier] UUIDString];
***********************隐藏状态栏******************************
- (UIStatusBarStyle)preferredStatusBarHiden
{
return YES;
}
**********************取消tableView的cell的选中状态**************************
[tableView deselectRowAtIndexPath:[tableView indexPathForSelectedRow] animated:YES];
*********************AFNetworking清除缓存*************************
//显示缓存大小
NSInteger size = [[NSURLCache sharedURLCache] currentMemoryUsage];
//字节要转化为M
CGFloat fileSize = size/1024.0/1024.0;
UIActionSheet *sheet = [[UIActionSheet alloc] initWithTitle:[NSString stringWithFormat:@"缓存大小：%.3fM",fileSize] delegate:self cancelButtonTitle:@"取消" destructiveButtonTitle:@"确定" otherButtonTitles: nil];
[sheet showInView:self.view];
//代理方法清除缓存
- (void)actionSheet:(UIActionSheet *)actionSheet clickedButtonAtIndex:(NSInteger)buttonIndex
{
if (buttonIndex == actionSheet.destructiveButtonIndex)
{
[[NSURLCache sharedURLCache] removeAllCachedResponses];
}
}
*********************tableView的cell的分割线从顶端（最左端）开始*************************
- (void)viewDidLayoutSubviews{
if ([self.tableView respondsToSelector:@selector(setSeparatorInset:)]) {
[self.tableView setSeparatorInset:UIEdgeInsetsMake(0, 0, 0, 0)];
}
if ([self.tableView respondsToSelector:@selector(setLayoutMargins:)]) {
[self.tableView setLayoutMargins:UIEdgeInsetsMake(0, 0, 0, 0)];
}
}
- (void)tableView:(UITableView *)tableView willDisplayCell:(UITableViewCell *)cell forRowAtIndexPath:(NSIndexPath *)indexPath{
if ([cell respondsToSelector:@selector(setSeparatorInset:)]) {
[cell setSeparatorInset:UIEdgeInsetsZero];
}
if ([cell respondsToSelector:@selector(setLayoutMargins:)]) {
[cell setLayoutMargins:UIEdgeInsetsZero];
}
}
***********改变webView的字体大小********************
- (void)webViewDidFinishLoad:(UIWebView *)webView{
[UIApplication sharedApplication].networkActivityIndicatorVisible = NO;
NSString *str =[NSString stringWithFormat: @"document.getElementsByTagName('body')[0].style.webkitTextSizeAdjust= '%@%%'",@(250)];
[_webView stringByEvaluatingJavaScriptFromString:str];
}
***********webView加载git动画********************
NSString *path = [[NSBundle mainBundle] pathForResource:@"happy" ofType:@"gif"];
//将图片转为NSData
NSData *gifData = [NSData dataWithContentsOfFile:path];
//自动调整尺寸
_webView.scalesPageToFit = YES;
//禁止滚动
_webView.scrollView.scrollEnabled = NO;
//设置透明效果
_webView.backgroundColor = [UIColor clearColor];
_webView.opaque = 0;
//加载数据
[_webView loadData:gifData MIMEType:@"image/gif" textEncodingName:nil baseURL:nil];
#define UIColorFromRGB(rgbValue) [UIColor colorWithRed:((float)((rgbValue & 0xFF0000) >> 16))/255.0 green:((float)((rgbValue & 0xFF00) >> 8))/255.0 blue:((float)(rgbValue & 0xFF))/255.0 alpha:1.0]
