摘要：字符串操作：http://www.myexception.cn/mobile/455287.html1,判断两字符串是否相同NSString *str1 = @"hello pepe"; NSString *str2=[NSString stringWithFormat:@"hello %s","pepe"]; if([str1 isEqualToString:str2]){ NSLog(@"相同"); } else{ NSLog(@"不同"); }2,浮点型运算CGRect screenRec 阅读全文

摘要：CGRect screenRect=[UIScreenmainScreen].bounds;CGSize screenSize=screenRect.size;//屏幕分辨率screenSize.width;screenSize.height; 阅读全文