tableView上面多出來20個像素，是因為自動布局的緣故怠李，設(shè)置一下屬性就可以解決問題
self.edgesForExtendedLayout = UIRectEdgeNone;
如果想數(shù)組進行倒序排列
NSMutableArray *array = [NSMutableArray arrayWithObjects:@“1”,@“2”,@“3”,nil];
NSArray *reversedArray = [[array reverseObjectEnumerator allObjects];
如果想scrollView不能上下滑動只能左右滑動下面設(shè)置可以實現(xiàn)
- (void)scrollViewDidScroll:(UIScrollView *)scrollView{
Float oldY = 0.0;
[scrollView setContentOffset:CGPointMake(scrollView.contentOffset.x,oldY)];
}
設(shè)置UILabel行間距和字間距
+(void)setLabelSpace:(UILabel*)label withValue:(NSString*)str withFont:(UIFont*)font{
NSMutableParagraphStyle*paraStyle = [[NSMutableParagraphStylealloc]init];
paraStyle.lineBreakMode=NSLineBreakByCharWrapping;
paraStyle.alignment=NSTextAlignmentLeft;
paraStyle.lineSpacing=UILABEL_LINE_SPACE;//設(shè)置行間距
paraStyle.hyphenationFactor=1.0;
paraStyle.firstLineHeadIndent=0.0;
paraStyle.paragraphSpacingBefore=0.0;
paraStyle.headIndent=0;
paraStyle.tailIndent=0;
//設(shè)置字間距NSKernAttributeName:@1.5f
NSDictionary*dic =@{NSFontAttributeName:font,NSParagraphStyleAttributeName:paraStyle,NSKernAttributeName:@0.0f};
NSAttributedString*attributeStr = [[NSAttributedStringalloc]initWithString:strattributes:dic];
label.attributedText= attributeStr;
}
5、計算UILabel的高度(帶有行間距的情況)
+(CGFloat)getSpaceLabelHeight:(NSString*)str withFont:(UIFont*)font withWidth:(CGFloat)width {
NSMutableParagraphStyle*paraStyle = [[NSMutableParagraphStylealloc]init];
paraStyle.lineBreakMode=NSLineBreakByCharWrapping;
paraStyle.alignment=NSTextAlignmentLeft;
paraStyle.lineSpacing=UILABEL_LINE_SPACE;
paraStyle.hyphenationFactor=1.0;
paraStyle.firstLineHeadIndent=0.0;
paraStyle.paragraphSpacingBefore=0.0;
paraStyle.headIndent=0;
paraStyle.tailIndent=0;
NSDictionary*dic =@{NSFontAttributeName:font,NSParagraphStyleAttributeName:paraStyle,NSKernAttributeName:@0.0f};
CGSizesize = [strboundingRectWithSize:CGSizeMake(width,KHeight)options:NSStringDrawingUsesLineFragmentOriginattributes:diccontext:nil].size;
returnsize.height;
}
