1.相关属性简述 NSJSONReadingOptions读取属性: typedef NS_OPTIONS(NSUInteger, NSJSONReadingOptions) { NSJSONReadingMutableContainers = (),// 返回可变容器 NSJSONReadingMutableLeaves = (), // 不仅返回的最外层是可变的, 内部的子数值或字典也是可变对象 NSJSONReadingAllowFragments = ()// 返回允许JSON字符串最外…

(持续更新中……) 1,四舍五入 2,剔除字符 3,拼接字符 4,字符个数和长度 5,字符串的比较 6,字符串的范围 7,字符串转Number类型…

1.分割字符串 NSString * str1 = @"123/456"; NSArray * arr1 = [str1 componentsSeparatedByString:@"/"];  //根据 "/" 把字符串分割 2.截取字符串(字符串下标从0开始数) (1)截取到第N位(不包含第N位) NSString * str = @"123456"; NSString * str1 = [str substringToIn…

Object-c中比较两个字符串是否相等时,应该用isEqualToString:而不能仅仅只是比较字符串的指针值. NSString *str1=@"hello 1";  NSString *str2;  str2=[NSString stringWithFormat:@"hello %d", 1];  if ([thing1 isEqualToString:thing2]){     NSLog(@"They are the same!") …

例如,要截取一个字符串中,两个指定字符串中间的字符串,OC截取方法如下: // 要截取 "> 和 </ 之间的汉字内容: @implementationViewController - (void)viewDidLoad { [super viewDidLoad]; NSString *string = @"<a href=\"http\">这是要截取的内容</a>"; NSRange startRange = [str…

- (BOOL)isUrlString { NSString *emailRegex = @"[a-zA-z]+://.*"; NSPredicate *emailTest = [NSPredicate predicateWithFormat:@"SELF MATCHES %@", emailRegex]; return [emailTest evaluateWithObject:self]; }…

+ (BOOL)stringContainsEmoji:(NSString *)string { __block BOOL returnValue = NO; [string enumerateSubstringsInRange:NSMakeRange(0, [string length]) options:NSStringEnumerationByComposedCharacterSequences usingBlock:^(NSString *substring, NSRange subst…

- (CGFloat)achiveWidthWithHeight:(CGFloat)height Font:(UIFont *)font { CGSize size = [self boundingRectWithSize:CGSizeMake(MAXFLOAT, height) options:NSStringDrawingUsesLineFragmentOrigin attributes:@{NSFontAttributeName:font} context:nil].size; retur…

一个简单的操作,记录下: NSString *strUrl = [urlString stringByReplacingOccurrencesOfString:@" " withString:@""]; 去掉空格 NSString *strUrl = [urlString stringByReplacingOccurrencesOfString:@" " withString:@"/"];替换字符 仅做记录!…

改变指定位置字符的颜色,代码如下: NSString *descStr = @"楼主"; NSString *nickStr = [NSString stringWithFormat:@"小仙女%@",descStr]; NSMutableAttributedString *attrStr = [[NSMutableAttributedString alloc]initWithString:descStr]; [attrStr addAttribute:NSFore…