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nsstring获取

NSString *aString = @"213"; char c = [aString characterAtIndex:0]; char c1 = [aString characterAtIndex:1];

NSString *str = @"123456"; //获取从0开始的后面的字符 只能到字符串最后未结束 NSString *str1 = [str substringFromIndex:0]; //获取从0开始到3的之间的字符 只能从0开始 NSString *str2 = [str substringToIndex:3]; //获取从0到3的之间的字...

//有两种方法 NSString *originalString = @"I wanna go to the Rio Olympics"; //1.substringFromIndex: 从第18位字符开始到最后的字符的字符串截取 NSString *subfixString = [originalString substringFromIndex:18]; //2.substringWithRange...

#define varString(var) [NSString stringWithFormat:@"%s",#var] int nihao= 0; NSString * nihaoString= varString(nihao);

代码如下: NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init]; [dateFormatter setDateStyle:NSDateFormatterMediumStyle]; [dateFormatter setTimeStyle:NSDateFormatterNoStyle]; [dateFormatter setTimeZone:GTMzone]; NSDa...

其实动态获取字符串NSString的内容宽度高度最主要的还是API NSString类提供的一个方法: sizeWithFont: constrainedToSize 例如: CGSize feelSize = [feeling sizeWithFont:[UIFont systemFontOfSize:12] constrainedToSize:CGSizeMake(190,200).

NSRange range = [str rangeOfString:@"aaa"]; //现获取要截取的字符串位置 NSString * result = [str substringFromIndex:range.location]; //截取字符串 希望可以帮到你!

ios关于文件的读取有四种方法: #import int main(int argc, const char * argv[]) { @autoreleasepool { //第一种方法: NSFileManager实例方法读取数据 NSArray* paths = NSSearchPathForDirectoriesInDomains(NSDesktopDirectory, NSUserDoma...

NSString *string1 = @"test"; NSString *string2 = @"test"; NSLog(@"SW - %d:%d",string1,string2);直接输出内存地址(十进制),

//字符串分割 NSString *str1=@"1[2[3[4";// NSArray *arry=[str1 componentsSeparatedByString:@"["]; 接下来怎么做 你懂的

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