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我正在處理這個for循環,它的工作原理是完美的..我經常返回找到的數字列表,但我需要循環以降序給我回數字......從現在30到18歲,而不是18到30歲...有人可以'給我一個幫助嗎?在一個循環中反轉NSInteger對於
我張貼有問題的代碼
for (NSInteger i = 18; i <= 30; i += 2) {
self.axisY_Label = [[UILabel alloc] initWithFrame:CGRectMake(10, paddingValue, 35, 20)];
self.axisY_Label.text = [NSString stringWithFormat:@"%ld", (long)i];
self.axisY_Label.textColor = [UIColor whiteColor];
self.axisY_Label.font = [UIFont fontWithName:@"HelveticaNeue" size:13];
UIView *line = [[UIView alloc] initWithFrame:CGRectMake(_axisY_Label.frame.size.width, _axisY_Label.center.y, self.frame.size.width, 0.3)];
line.backgroundColor = [UIColor whiteColor];
line.alpha = .2;
[self addSubview:line];
paddingValue += _axisY_Label.frame.size.width;
[self addSubview:_axisY_Label];
}