一、导航栏
1、状态栏
(1)、更改状态栏的字体颜色
参考博客:IOS上 关于状态栏的相关设置(UIStatusBar)\n
iOS状态栏使用总结
注意:tableView滑动改变颜色,可以直接看第一篇,在滑动改变的方法中,必须重新加载状态栏颜色(setNeedsStatusBarAppearanceUpdate)
(2)、通话或者开启热点,状态栏由20更改为40
解决方法(监听UIApplicationDidChangeStatusBarFrameNotification或者willChange方法):
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(didChangeStatusBarFrame) name:UIApplicationDidChangeStatusBarFrameNotification object:nil];
- (void)didChangeStatusBarFrame{
// NSLog(@"------------\n%@",[self class]);
// NSLog(@"%ld",self.view.subviews.count);
for (UIView *subView in self.view.subviews) {
// NSLog(@"subview:%@-%@",subView,[subView class]);
CGRect subFrame = subView.frame;
CGFloat origalH = subFrame.size.height;
CGFloat origalY = subFrame.origin.y;
if ([subView isKindOfClass:[UIScrollView class]]) {
if ([[UIApplication sharedApplication]statusBarFrame].size.height - 20>0) {
subFrame.size.height = origalH - 20;
}else{
subFrame.size.height = origalH + 20;
}
}else{
if (subFrame.size.height!=NavHeight) {
if ([[UIApplication sharedApplication]statusBarFrame].size.height - 20>0) {
subFrame.origin.y = origalY - 20;
}else{
subFrame.origin.y = origalY + 20;
}
}
}
subView.frame = subFrame;
}
// NSLog(@"~~~~~~~~");
}
当然,其实最有效的方法,还是,直接使用!!!约束!!!新项目还是使用约束。
二、scrollView
1、滑动视图从iOS 11.0 开始,因为添加了安全距离,因此初始化,最好添加下面代码:
if (@available(iOS 11.0, *)) {
self.tableView.insetsContentViewsToSafeArea = NO;
self.tableView.contentInsetAdjustmentBehavior = UIScrollViewContentInsetAdjustmentNever;
} else {
self.automaticallyAdjustsScrollViewInsets = NO;
}
if (@available(iOS 11.0, *)) {
//如果不添加,可能头部尾部多出空白
self.tableView.estimatedRowHeight = 0;
self.tableView.estimatedSectionFooterHeight = 0;
self.tableView.estimatedSectionHeaderHeight = 0;
}
tableView没有头部尾部,但是仍有小部分空白,可以重置高度
- (CGFloat)tableView:(UITableView *)tableView heightForHeaderInSection:(NSInteger)section{
return 0.01;
}
- (CGFloat)tableView:(UITableView *)tableView heightForFooterInSection:(NSInteger)section{
return 0.01;
}
三、文本框
1、UITextField
(1)、限制字数(为了限制中文)
[[NSNotificationCenter defaultCenter] addObserver:self selector:@selector(textFieldDidChange:) name:UITextFieldTextDidChangeNotification object:_textField];
- (void)textFieldDidChange:(NSNotification *)noti{
UITextField *textField = (UITextField *)[noti object];
// NSString *toBeString = textField.text;
NSString *lang = [[UITextInputMode currentInputMode] primaryLanguage]; // 键盘输入模式
if ([lang isEqualToString:@"zh-Hans"]) { // 简体中文输入,包括简体拼音,健体五笔,简体手写
UITextRange *selectedRange = [textField markedTextRange];
//获取高亮部分
UITextPosition *position = [textField positionFromPosition:selectedRange.start offset:0];
// 没有高亮选择的字,则对已输入的文字进行字数统计和限制
if (!position) {
NSString *str = textField.text;
if (str.length>200) {
str = [str substringToIndex:200];
}
self.textField.text = str;
}// 有高亮选择的字符串,则暂不对文字进行统计和限制
else{
}
}
// 中文输入法以外的直接对其统计限制即可,不考虑其他语种情况
else{
NSString *str = textField.text;
if (str.length>200) {
str = [str substringToIndex:200];
}
self.textField.text = str;
}
}
- (void)dealloc{
[[NSNotificationCenter defaultCenter]removeObserver:self name:UITextFieldTextDidChangeNotification object:_textField];
}
(2)、直接使用系统UITextField,输入过长字符串,会出现从半截开始,如:北京已有速电子商务科技有限公司有限公司,解决方法,也是使用上面的通知监听,在方法textFieldDidChange里,直接
- (void)textFieldDidChange:(NSNotification *)noti{
UITextField *textField = (UITextField *)[noti object];
NSString *str = textField.text;
self.textField.text = str;
}
2、UITextView
(1)、限制字数
写一个公用类,进行限制,参考:https://github.com/yuanweiqianyu/ziLiao
四、扩展类目
1、UIColor
+ (UIColor *)colorWithRed:(NSInteger)red green:(NSInteger)green blue:(NSInteger)blue
{
return [UIColor colorWithRed:red/255.0 green:green/255.0 blue:blue/255.0 alpha:1];
}
+ (UIColor *)colorWithHexString:(NSString *)color alpha:(CGFloat)alpha
{
NSString *cString = [[color stringByTrimmingCharactersInSet:[NSCharacterSet whitespaceAndNewlineCharacterSet]] uppercaseString];
// String should be 6 or 8 characters
if ([cString length] < 6) {
return [UIColor clearColor];
}
// strip 0X if it appears
if ([cString hasPrefix:@"0X"])
cString = [cString substringFromIndex:2];
if ([cString hasPrefix:@"#"])
cString = [cString substringFromIndex:1];
if ([cString length] != 6)
return [UIColor clearColor];
// Separate into r, g, b substrings
NSRange range;
range.location = 0;
range.length = 2;
//r
NSString *rString = [cString substringWithRange:range];
//g
range.location = 2;
NSString *gString = [cString substringWithRange:range];
//b
range.location = 4;
NSString *bString = [cString substringWithRange:range];
// Scan values
unsigned int r, g, b;
[[NSScanner scannerWithString:rString] scanHexInt:&r];
[[NSScanner scannerWithString:gString] scanHexInt:&g];
[[NSScanner scannerWithString:bString] scanHexInt:&b];
return [UIColor colorWithRed:((float) r / 255.0f) green:((float) g / 255.0f) blue:((float) b / 255.0f) alpha:alpha];
}
2、NSString(正则验证)
https://github.com/yuanweiqianyu/ziLiao
仅做参考,如有错误,敬请指正。日后陆续更新补充。
最后更新时间:2018.06.12
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