字符串decode編碼

NSString*codingStr = [@"我的" stringByAddingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

decode解碼

NSString*encodingStr = [codingStr stringByReplacingPercentEscapesUsingEncoding:NSUTF8StringEncoding];

判斷字符串是否存在某字符

if([str1 rangeOfString:@“aaa”].location != NSNotFound) {

NSLog(@"這個(gè)字符串中有a");

}

//rangeOfString 前面的參數(shù)是要被搜索的字符串，后面的是要搜索的字符

//NSNotFound 表示請(qǐng)求操作的某個(gè)內(nèi)容或者item沒有發(fā)現(xiàn)，或者不存在

截取字符串

NSString*string =@"sdfsfsfsAdfsdf";

string = [string?substringToIndex:7];//去掉下標(biāo)7之后的字符串

NSLog(@"截取的值為：%@",string);

[string?substringFromIndex:2];//去掉下標(biāo)2之前的字符串

NSLog(@"截取的值為：%@",string);

匹配字符串

NSString*string =@"sdfsfsfsAdfsdf";

NSRangerange = [stringrangeOfString:@"f"];//匹配得到的下標(biāo)

NSLog(@"rang:%@",NSStringFromRange(range));

string = [string?substringWithRange:range];//截取范圍類的字符串

NSLog(@"截取的值為：%@",string);

分隔字符串

NSString*string =@"sdfsfsfsAdfsdf";

NSArray?*array = [string?componentsSeparatedByString:@"A"]; //從字符A中分隔成2個(gè)元素的數(shù)組

NSLog(@"array:%@",array); //結(jié)果是adfsfsfs和dfsdf