解决ImageView/Button变形
- 保证图片在不同比例手机上不会变形的方法；
_ImageView.contentMode = UIViewContentModeScaleAspectFill;
_ImageView.clipsToBounds = YES;
[nutritionButton setImage:[UIImage imageNamed:@"HG_Main_YYZJ"] forState:UIControlStateNormal];
[nutritionButton.imageView setContentMode:UIViewContentModeScaleAspectFill ];
- 分享一个写的不错的文章关于uiview视图的小技巧
http://www.cnblogs.com/pengyingh/articles/2379476.html
动态高度
CGRect rect = [@"需要展示的文字" boundingRectWithSize:CGSizeMake(SCREEN_W - (SCREEN_W/10*2.6), MAXFLOAT)
options:NSStringDrawingTruncatesLastVisibleLine | NSStringDrawingUsesLineFragmentOrigin | NSStringDrawingUsesFontLeading
attributes:@{NSFontAttributeName:[UIFont boldSystemFontOfSize:14]} context:nil];
注释：
1.CGSizeMake(SCREEN_W - (SCREEN_W/10*2.6), MAXFLOAT)
这段文字需要的宽高
2.[UIFont boldSystemFontOfSize:14]
这段文字的大小
自动布局
当我们设置navBar为透明时 整个屏幕坐标会向上64 ，当显示时就会出现屏幕下移 ，有人会说取动布局
self.automaticallyAdjustsScrollViewInsets = NO;
当这个方法不好使的时候get大家一个新技能
self.extendedLayoutIncludesOpaqueBars = YES;
这个属性看单词的意思，延伸视图包含不包含不透明的Bar,是用来指定导航栏是透明的还是不透明，IOS7中默认是YES，当滚动页面的时候我们隐约能在导航栏下面看到我们页面的试图，如果设置为NO就会从导航栏下面展示我们的视图
获取当前时间
NSDate *now = [NSDate date];
NSLog(@”now date is: %@”, now);
NSCalendar *calendar = [NSCalendar currentCalendar];
NSUInteger unitFlags = NSYearCalendarUnit | NSMonthCalendarUnit | NSDayCalendarUnit | NSHourCalendarUnit | NSMinuteCalendarUnit | NSSecondCalendarUnit;
NSDateComponents *dateComponent = [calendar components:unitFlags fromDate:now];
int year = [ dateComponent year];
int month = [dateComponent month];
int day = [dateComponent day];
int hour = [dateComponent hour];
int minute = [dateComponent minute];
int second = [dateComponent second];
NSLog(@”year is: %d”, year);
NSLog(@”month is: %d”, month);
NSLog(@”day is: %d”, day);
NSLog(@”hour is: %d”, hour);
NSLog(@”minute is: %d”, minute);
NSLog(@”second is: %d”, second);
MJ崩溃现象
3550A584-4921-4AC4-A931-99149B057DF3.png
MJRefresh出现崩溃现象
解决办法：类库增加判断
if (range.location != NSNotFound) {
language = [language substringToIndex:range.location];
}
get一个关于 UIslider控件方法大全
https://my.oschina.net/u/2340880/blog/401902
改变self.title字体颜色
// NSDictionary * dict=@{NSForegroundColorAttributeName :[UIColor whiteColor]};
// self.navigationController.navigationBar.titleTextAttributes = dict;
软件下载
http://www.orsoon.com/Mac/144664.html?winzoom=0.875
状态栏
改变状态栏颜色
info 添加View controller-based status bar appearance字段
[[UIApplication sharedApplication ]setStatusBarStyle:UIStatusBarStyleDefault];//黑色
[[UIApplication sharedApplication ]setStatusBarStyle:UIStatusBarStyleLightContent];//白色
状态栏详解
http://www.cnblogs.com/ethan-qi/p/5527588.html
http://blog.csdn.net/iukey/article/details/7327164
单个页面需要旋转时
#pragma mark 旋转屏幕
- (UIInterfaceOrientationMask)supportedInterfaceOrientations{
return UIInterfaceOrientationMaskLandscape;
}
-(UIInterfaceOrientation)preferredInterfaceOrientationForPresentation {
return UIInterfaceOrientationLandscapeRight;
}
- (BOOL)prefersStatusBarHidden
{
return NO; // 返回NO表示要显示，返回YES将hiden
}
iOS开发——OC篇&常用问题解答（一）
http://www.cnblogs.com/iCocos/p/4539000.html
富文本
NSString * ZJYDescribeStr = @" 点击上面的注册按钮，即表示您同意《逐步环球的服务和隐私条款》";
NSRange rang = {22,14};
NSMutableAttributedString * att = [[NSMutableAttributedString alloc]initWithString:ZJYDescribeStr];
NSDictionary * dic = @{NSForegroundColorAttributeName:[[UIColor purpleColor]colorWithAlphaComponent:0.3]};
[att setAttributes:dic range:rang];
label.attributedText = att;
小技巧
在xcode中，大家可能会想要像浏览器一样打开多个标签来查看多个文件的内容，因为之前遇到打开多个标签的情况，所以知道肯定有。可是找了半天也没有找到打开多个标签在哪里
现在奉上快捷键：command + T
RGB
将一个 NSString = @“#FF0000”转换成 RGB的方法
NSString *color = @“#FF0000”;
// 转换成标准16进制数
[color replaceCharactersInRange:[color rangeOfString:@"#" ] withString:@"0x"];
// 十六进制字符串转成整形。
long colorLong = strtoul([color cStringUsingEncoding:NSUTF8StringEncoding], 0, 16);
// 通过位与方法获取三色值
int R = (colorLong & 0xFF0000 )>>16;
int G = (colorLong & 0x00FF00 )>>8;
int B = colorLong & 0x0000FF;
//string转color
UIColor *wordColor = [UIColor colorWithRed:R/255.0 green:G/255.0 blue:B/255.0 alpha:1.0];
自定义手势收起键盘
- (void)viewDidLoad
{
[super viewDidLoad];
UITapGestureRecognizer *tapGestureRecognizer = [[UITapGestureRecognizer alloc] initWithTarget:self action:@selector(keyboardHide:)];
//设置成NO表示当前控件响应后会传播到其他控件上，默认为YES。
tapGestureRecognizer.cancelsTouchesInView = NO;
//将触摸事件添加到当前view
[self.view addGestureRecognizer:tapGestureRecognizer];
}
-(void)keyboardHide:(UITapGestureRecognizer*)tap{
[textFiled resignFirstResponder];
}
设备号ID的获取
//设备id获取
#define DEVICE [[UIDevice currentDevice].identifierForVendor UUIDString]
更改适配
Build Active Architecture Only
Debug Yes
Release No
滑动tableView时 收起键盘
_tableView.keyboardDismissMode = UIScrollViewKeyboardDismissModeOnDrag;